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Interview Questions On MindMajix

If you're looking for The Best Online Interview Questions and Answers for Experienced & Freshers, you are at right place. There are lot of opportunities from many reputed companies in the world.
Mindmajix offers the best advanced Interview Questions 2018 that helps you in cracking your interview.


The Best Informatica Interview Questions 2018-Learn Now!

The Best Informatica Interview Questions 2018-Learn Now!

Q: What is Version Control?
1. By using version control we are maintaining the history of the metadata objects.
2. A versioned repository stores multiple versions of an object.
3. Each version is a separate object with unique number.
4. You can perform the following change management tasks to create and manage multiple versions of objects in the respository.
i. Check in Read only Mode
ii. Check in Editable Mode

Q: How to use Normalizer Transformation in Informatica?
1. This is of type an Active T/R which reads the data from COBOL files and VSAM sources (virtual storage access method)
2. Normalizer T/R act like a source Qualifier T/R while reading the data from COBOL files.
3. Use Normalizer T/R that converts a single input record into multiple output records. This is known as Data pivoting.

Q: What are the Limitations of Pushdown Optimization?
1. Rank T/R cannot be pushed
2. Transaction control T/R
3. Sorted aggregation.

Q: How to use PMCMD Utiliy Command?
1. It is a command based client program that communicates with integration service to perform some of the tasks which can also be performed using workflow manager client.
2. Using PMCMD we can perform the following tasks:

i. Starting workflow.
ii. Scheduling workflow.

  1. The PMCMD can be operated in two different modes:

i. Interactive Mode.
ii. Command line Mode.

Q: Scheduling a Workflow?
1. A schedule is an automation of running the workflow at a given date and time.
2. There are 2 types of schedulers:

(i) Reusable scheduler
(ii) Non Reusable scheduler

(i) Reusable scheduler:-
A reusable scheduler can be assigned to multiple workflows.

(ii) Non Reusable scheduler:-

  • A non reusable scheduler is created specific to the workflow.
  • A non reusable scheduler can be converted into a reusable scheduler.

The following are the 3rd party schedulers:

  1. Cron (Unix based scheduling process)
  2. Tivoli
  3. Control M
  4. Autosys
  5. Tidal
  6. WLM (work hard manager)

  • 99% production people will do scheduling.
  • Before we run the workflow manually. Through scheduling we run workflow this is called Auto Running.

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Top SSIS Interview Questions And Answers For Experienced 2018-Learn Now!

Top SSIS Interview Questions And Answers For Experienced 2018-Learn Now!

Q. What is SSIS?
SSIS was first introduced with SQL Server 2005, which was the next generation of SQL Server software after SQL Server 2000. SSIS is an ETL tool that handles data Extraction, Transformation and load. In addition, it can handle more tasks besides the ETL tasks such as data profiling, file system manipulation etc…. If you know or, you can use the script task to perform much more efficient batch operations.

Q. What is SSIS control flow integration?
SSIS control flow allows you to program graphically how the tasks will run by using the logical connectors between tasks. there are three basic logical connectors that you can use: success, failure, or complete. Furthermore, you can use the FX (expression) to handle more complex conditions in your control flow.

Q. What is Data Transformation?
The data transformation stage applies a series of rules or functions to the extracted data from the source to derive the data for loading into the end target.
Q. What kind of variables can you create?
You can create global variables and task level variables in SSIS. For programmers, these variables are the same as global and function level variables. A global variable is available to all tasks across the entire job. Variables created in tasks are only available within that task.

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The Best IOS Development Interview Questions [UPDATED] 2018

IOS Development Interview Questions| IOS Applications| Multitasking Function Of IOS| IOS For Freshers And Professionals| Read More!

The Best SSAS Interview Questions & Answers [UPDATED - 2018]

SSAS Interview Questions | Advanced Technical Topics | For freshers & Professionals | Free Practice Test | Free Sample Resumes. Read Now!


Top RPA Interview Questions 2018-Learn Now!

Top RPA Interview Questions 2018-Learn Now!

Q. What exactly do you understand by Robotic Automation?
There are several rules-based tasks which in the present scenario are handled by the computers or the machines which can simply mimic the actions performed by humans. The same can be considered as Robotic Automation. It is becoming more and more common in the present time. Read more on Robotic Process Automation.

Q. What are the factors that are encouraging the organizations to proceed with RPA according to you?
Well, the biggest factor is RPA always makes sure of error-free results which mean no wastage of time. Of course, time is money in the present scenario. Organizations need not to worry about paying extreme attention to quality verification and testing the results again and again. Also, it needs less human interference which always makes sure of no conflicts and fast operations. Moreover, for organizations, its only one-time investment and results are forever.

Related Article: Enterprise Robotic Process Automation Software

Q. What are the pros and cons that are associated with Robotic Process Automation according to you?
Everything has its own advantages and drawbacks when it comes to actual implementation.Robotic Process Automation (RPA) is such an approach that too has many benefits and disadvantages. The benefits include error-free outcomes, faster operations, less human inference, high profits, less monitoring. On the other side, the biggest drawback is not all the organizations can afford the same in the initial stage. All tasks depend on each other. Interruption of one can largely affect all other sub-tasks. This is another biggest issue which is there with RPA approach.

Q. Name any four popular RPA vendors you are familiar with?
Verint, NICE, Blue Prism and Kofax are the well-known RPA vendors.

Q. Do you have any idea about the characteristics of RPA?
The biggest thing is RPA is totally user-friendly. All the tasks are based on business operations than on IT. It is not always necessary that all the projects need top-notch skills and large investment in the infrastructure. There are a lot of risks and complexities that can simply be eliminated. Most of the tasks are handled by the software robots and there is a central control mechanism for the same.

Q. Suppose you need to handle a project based on RPA and the required skills are not sufficient, would you reject the project or find an alternative. IF so, how?
Leaving a project is not at all a wise choice. The fact is there are many options available for RAP training. Most of the options have a short duration. So any team member can be provided training on such skills that lack. This can be the true options available. Also, support is available from every vendor that can also assist in this matter.

Q. What are the basic or the general requirements of RAP for front and back office processing?
Well, the fact is RPA is well-known for its flexibility and it is capable to meet the robust IT standards without compromising the security. It is possible to use the robotic software for front and back office. Most of the requirements are same for both of them and thus users need not to worry. The same configuration can easily be deployed and the results that can be derived are always superior in every aspect.

Q. Does handling Robotic Process Automation operations need special skills?
The fact is RPA is an approach that doesn’t need programming skills. Anyone can be an RPA expert with some basic knowledge or training which is generally having a very short duration. Everything can be managed easily either through a flowchart or in a stepwise manner.

Q. How can you say organizations can save cost in the long run by switching to RPA?
There is no need for the business owners to hire professionals with special skills in RPA, Gain knowledge on getting work done using Robust Process Automation. Existing or the current employees can easily be trained. RAP assures quality outcomes without compromising the efficiency and it is reliable to work and adopt.

Q. How can you say RPA is Wide-Range Automation in a true sense?
Well, the fact is RPA always make sure of accuracy irrespective of the task one performs through it. It can be considered in modern banking, telecom, insurance, healthcare, security, intelligence, as well as in communications sector. By boosting the transaction process, it is possible for the users to simply automate the programs that are highly complex and need extra time if handled with other methods.

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The Best Unix Shell Scripting Interview Questions [UPDATED] 2018

Unix Shell Scripting Interview Questions | Advanced Technical Topics | For freshers & Professionals | Free Practice Test | Free Sample Resumes. Read Now!


Essential CCNA Interview Questions 2018-Learn Now!

Essential CCNA Interview Questions 2018-Learn Now!

Q. What is a network address? What is the purpose of each part of a network address?
Network addresses are the addresses used in packets. Each network address has a network part, which identifies a particular data link, and a host or node part, which identifies a specific device on the data link identified by the network part.

Q. What is Routing?
Routing is a process of finding a path to transfer data from source to destination.

Q. What is the advantage of VLAN?
VLAN facilitates you to create a collision domain by groups other than just physical location while in conventional LAN domains are always tied to physical location.

Q. What are the advantages of LAN switching?
Following are the main advantages of LAN switching:
1. It allows full duplex data transmission and reception.
2. Media rate adaption.
3. Easy and efficient migration.

Q. What is the difference between private IP and public IP?
Public IP is used across internet while private IP is used within the local LAN.

Q. Explain the terms Unicast, Multicast, Broadcast and Multicast.
Unicast: It specifies one to one communication.
Multicast: It specifies one to a group communication.
Broadcast: It specifies one to all communication.
Multicast: It specifies one to nearest communication.

Q. What is the difference between static IP addressing and dynamic IP addressing?
Static IP addresses are reserved and they don't change over time while dynamic IP addresses can be changed each time you connect to the internet.
Static IP addresses are given manually while dynamic IP addresses are provided by DHCP server.

Q. What is VLAN?
VLAN stands for Virtual Local Area Network.

Q. What is the difference between communication and transmission?
Communication is a process of sending and receiving data by an externally connected data cable whereas transmission is a process of sending data from source to destination.

Q. What is the 2nd layer of OSI layer model?
Data link layer is the second layer of OSI model.

Q. What is the main difference between full and half duplex?
In full duplex, communication occurs from both side, while in half duplex communication occurs in one direction.

Q. At which layer of OSI does frame relay technology work?
Frame relay work at Data link layer OSI model

Q. What is the passive topology in CCNA?
When the topology enables the computers on the network only to simply listen and receive the signals, it is known as passive topology because they don't amplify the signals any way.

Q. Can you assign IP on layer 2?
No, you cannot assign IP addresses on layer 2.

Q. What are the possible ways of data transmission in CCNA?
These are the three possible ways of data transmission:
1. Simplex
2. Half-duplex
3. Full-duplex

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The Best AWS Interview Questions & Answers [UPDATED ... - Mindmajix

The Best AWS Interview Questions & Answers [UPDATED ... - Mindmajix

Q: What do you mean by classic link?
The Amazon virtual private cloud classic link will permit EC2 instances in the EC2 classic platform. This occurs so that it can communicate with the instances that are present in the virtual private cloud. The communication occurs with the help of private IP addresses. In order to use a classic link it is important that you enable it to for virtual private cloud in your account. Then you will need to associate a security group with an instance in the EC2 classic. This security group is from the VPC for which you enabled the classic link in your account. Each and every rule that is there for the VPC security group is applicable for the communications between the instances in EC2 classic and those instances in the VPC.
Q: What is the process to use classic link?
For the purpose of using classic link, you will need to enable minimum one virtual private cloud on your account for classic link. After doing this, you can associate a security group from that VPC to the EC2 classic instance that you would prefer. This will make sure that your EC2 classic instance is linked to VPC. It will become a member of the chosen security group in the VPC. It should be remembered that you cannot connect your EC2 classic instance to more than one virtual private cloud at the same time.
Q: Is it possible for an EC2 classic instance to become a member of a virtual private cloud?
No, it is not possible for an EC2 classic instance to be a member of a VPC though it can become a member of the security group of virtual private cloud. The security group should be associated with the EC2 classic instance.
Q: Is it possible for classic link settings on EC2 classic interface to persist through start or stop cycles?
It is not possible for a classic link connection to persist through the start or stop cycles of the EC2 classic interface. After the EC2 classic interface is stopped it will need to be linked back to a virtual private cloud. But the classic link will persist through the instance reboot cycles.
Q: Is it possible to have more than two network interfaces to be attached to EC2 instance?
The number of network interfaces that are to be attached with an EC2 instance will depend on the type of the instance.
Q: Can a network interface in one availability zone be attached with an instance in another availability zone?
The instances that are present in the same availability zone can be attached with network interfaces.
Q: Can a network interface in one VPC be attached to an instance that is present in another VPC?
It is possible for the network interfaces to be attached to instances that are in the same virtual private cloud as that of the interface.
Q: Is it possible to use elastic network interfaces in a way so that it can host multiple websites which are required to separate IP addresses on a single instance?
Yes it is a possible scenario but not the best suited use case in case of multiple interfaces. Apart from doing this it is much more logical to assign an additional private IP address to the instance and to associate the EIPs to the private IPs as per requirement.
Q: Can a primary interface be detached on EC2 instance?
It is possible. You can only attach and detach secondary interfaces on an instance of EC2 but you would not be able to detach eth0 interface.
Q: In order to access VPCs that you are peered with, can you make use of AWS direct connect or hardware VPN connections?
This is not a possible concept. Amazon VPC does not support edge to edge routing.
Q: Is it possible to peer two VPCs with matching IP address ranges?
No, it is not possible to peer two VPCs with matching IP address ranges since peered VPCs should posses IP ranges that are non-overlapping.
Q: In order to use peering connections, is it necessary to have an Internet gateway?
No, you do not need an Internet gateway in order to virtual private cloud peering connections.
Q: The VPC peering traffic that is present with the region, is it encrypted?
No, the VPC peering traffic within the region is not encrypted. The traffic between instances that is present in peered VPCs does remain isolated and private. This is similar to the fact the traffic between two instances in the same VPC are also isolated and private.
Q: In case of peering connections, is there any limitation on bandwidth?
There is no difference in bandwidth between instances in peered VPCs and also between instances in the VPC. Peered VPCs can be spanned by a placement group. But you will not be provided with full bisects on bandwidth that is present between instances in peered VPCs.
Q: Is it possible to modify the route tables of virtual private cloud? If possible then how?
Yes, it is possible go modify the route table of VPC. In order to specify which subnets are to be routed to VPC, Internet gateway or any other instances you are allowed to create route rules.
Q: Is it possible to specify the subnet that will be used by a gateway as its default?
Yes, it possible to specify which subnet will be used by which gateway as its default. You are entitled to make a default route for each and every subnet. Via the VPC, Internet gateway or the NAT gateway, the default route will be able to direct traffic to egress the virtual private cloud.
Q: In order to control and mane Amazon VPC, is it possible to make use of AWS management console?
It is possible to use AWS management console to manage and control Amazon VPC objects that include subnets, virtual private cloud, IPsec VPN connections, and Internet gateways. Also you can make use of a simple wizard in order to create a virtual private cloud.

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30+ Latest Machine Learning Interview Questions [UPDATED] 2018

Machine Learning Interview Questions | Advanced Technical Topics | For freshers & Professionals | Free Practice Test | Free Sample Resumes. Read Now!


Essential AngularJS Interview Questions 2018-Learn Now!

Essential AngularJS Interview Questions 2018-Learn Now!

Q. Databinding in angularjs
Angular remembers the value and compares it to previous value. This is basic dirty-checking. If there is a change in value, then it fires the change event.
The $apply() method, which is what you call when you are transitioning from non-angular world into angular world, calls $digest(). A digest is just plain old dirty-checking. It works on all browsers and is totally predictable.
To contrast dirty-checking (angular) vs change listeners (KO, backbone): While dirty-checking may seem simple, and even inefficient, (I will address that later), it turns out that it is semantically correct all the time, while change listeners have lots of weird corner cases and need things like dependency tracking to make it more semantically correct. KO dependency tracking is a clever feature for a problem which angular does not have.
Q. Cannot get to $rootScope
You can not ask for instance during configuration phase – you can ask only for providers.
Skip code block
var app = angular.module(‘modx’, []);
// configure stuff
app.config(function($routeProvider, $locationProvider) {
// you can inject any provider here
// run blocks$rootScope) {
// you can inject any instance here
Q. How to preventDefault on anchor tags?
UPDATE: I’ve since changed my mind on this solution. After more development and time spent working on this, I believe a better solution to this problem is to do the following:
And then update your css to have an extra rule:
cursor: pointer;
Its much more simple and provides the exact same functionality and is much more efficient. Hope that might be helpful to anyone else looking up this solution in the future.
Q. Difference between service, directive and module
Think of a module as being a place to wire up a number of other things, such as directives, services, constants etc. Modules can be injected into other modules giving you a high level of reuse.
When writing an angular app, you would have a top-level module which is your application code (sans templates)
Services are mainly a way to communicate between controllers, but you can inject one service into another. services are often used as a way to get to your data stores and people will wrap the angular api’s such as ngResource. This technique is useful since it makes testing (particularly mocking) quite easy. You can have services for doing other things like authentication, logging etc.
Directives are used for creating widgets or wrapping existing things like jquery plugins. Wrapping existing plugins can be a challenge and the reason you would do this is to establish a two-way data binding between the plugins and angular. If you don’t need two-way data binding then you don’t need to wrap them.
Directives are also a place to do DOM manipulation, catching DOM-events etc. You should not be doing DOM-related stuff in controllers or services. creating directives can get pretty complex, IMHO, I recommend first looking to api for something that will do what you are looking to do OR ask angular googlegroup for advice.
Q. AngularJS – How to use $routeParams in generating the templateUrl?
I couldn’t find a way to inject and use the $routeParams service (which I would assume would be a better solution) I tried this thinking it might work:
angular.module(‘myApp’, []).
config(function ($routeProvider, $routeParams) {
$routeProvider.when(‘/:primaryNav/:secondaryNav’, {
templateUrl: ‘resources/angular/templates/nav/’+$routeParams.primaryNav+’/’+$routeParams.secondaryNav+’.html’
Q. Which yielded this error: Unknown provider: $routeParams from myApp
If something like that isn’t possible you can change your templateUrl to point to a partial html file that just has ng-include and then set the url in your controller using $routeParams like this:
Skip code block
angular.module(‘myApp’, []).
config(function ($routeProvider) {
$routeProvider.when(‘/:primaryNav/:secondaryNav’, {
templateUrl: ‘resources/angular/templates/nav/urlRouter.html’,
controller: ‘RouteController’
function RouteController($scope, $routeParams) {
$scope.templateUrl= ‘resources/angular/templates/nav/’+$routeParams.primaryNav+’/’+$routeParams.secondaryNav+’.html’;
With this as your urlRouter.html
Q. In Angular Seed project, what is point of index-async.html?
I don’t see an app/index.ajax.html. I’m assuming you mean app/index-async.html.
The two files are interchangeable, and you can use either one to build your application. index-async.html loads scripts asynchronously, which might give you a faster bootstrap time. index.htmlloads scripts synchronously, which is often a bit slower, but the intention is that the code is easier to understand for someone learning to use the framework.
To read more about asynchronous bootstrapping, check out the docs here:
Q. angular.js link behaviour – disable deep linking for specific URLs
This is the code for turning off deep linking all together. It disables the click event handler from the rootElement.
angular.module(‘myApp’, [])
.run([‘$location’, ‘$rootElement’, function ($location, $rootElement) {
Q. this vs $scope in AngularJS controllers ?
“How does ‘this’ and $scope work in AngularJS controllers?”
• this
o When the controller constructor function is called,this is the controller.
o When a function defined on a $scope object is called,this is the “scope in effect when the function was called”. This may (or may not!) be the $scope that the function is defined on. So, inside the function, this and $scope may not be the same.
• $scope
o Every controller has an associated $scope object.
o A controller (constructor) function is responsible for setting model properties and functions/behavior on its associated $scope.
o Only methods defined on this $scope object (and parent scope objects, if prototypical inheritance is in play) are accessible from the HTML/view. E.g., from ng-click, filters, etc.

If you're looking for AngularJS Interview Questions for Experienced or Freshers, you are at right place. Mindmajix offers Advanced AngularJS Interview Questions 2018 that helps you in cracking your interview & acquire dream career as AngularJS Developer.


The Best API Testing Interview Questions [UPDATED] 2018 - Mindmajix

The Best API Testing Interview Questions [UPDATED] 2018 - Mindmajix


Q. What API testing means?
API stands for Application Programming interface details regarding how some software components must act together. In general terms, API testing is a set of procedures and functions allowing the creation of apps accessing data or features of an operating system or application. All in all, testing of such procedures is acknowledged as API testing.
Q. What are the names of tests executed on APIs?
There can be numerous reasons behind executing API testing and there are a number of tests that can be performed on APIs. Some common API test examples are as follows:
1. Any data structure which demands proper validation can be updated by API
2. In case some interruption arises during the process or any other event is prompted, you can call to another API
3. Tests for inputting condition based return values can be performed
4. With the help of these tests some resources can be easily modified like process killing, update of the database, etc.
5. The return values can also be tested which can be even null or are with wrong results
Q. What is the procedure to perform API testing and what exactly needs to be checked?
During the API testing process, a request is raised to the API with the known data. This way you can analyse the validation response. Basically, things that must be checked during performing API testing are:
1. Accuracy of data
2. Schema validation
3. HTTP status codes
4. Data type, validations, order and completeness
5. Authorization checks
6. Implementation of response timeout
7. Error codes in case API returns, and
8. Non-functional testing like performance and security testing
Q. What is the test environment of API?
To set up the test environment of API is not a cake walk. It is bit complete and demands the configuration of the database as well as server according to the need of the software. There is no availability of GUI (Graphical User Interface) in this form of testing.
Once the installation process is over, API is verified for the proper functioning. During the whole process API that is invoked by initial environment is being set up with distinct parameters to examine the test results.
Q. What approach should be followed for the API testing?
There are certain factors that determine the API testing approach. Let’s check them below:
1. Defining the accurate input parameters
2. Verifying the calls of the blend of two or more than two value added parameters
3. Defining the basic functionality and scope of the API program
4. Writing suitable API test cases and making use of testing techniques like equivalence class, boundary value, etc. to verify the functionality
5. Testing case execution
6. Testing result comparisons with the results expected
7. Verifying behaviour of API under conditions like the connection with files etc.
Q. Define the basic difference between API testing and UI level testing?
UI testing means the testing of graphical interface. It‘s focus is basically on the feel and look of an application. Within user interface testing, things like how user interacts with app elements such as images, fonts, layouts, etc is checked.
On the other hand API testing allows communicating between two different software systems. During this testing, a software system that implements an API includes sub-routines or functions that can be performed by other software system.
Q. Name the common protocols used in API testing.
Many protocols are there that can be used in API testing. These are as follows:
Q. Name different tools used for API testing.
There are many tools available that can be used for API testing. A few of them are:
Postman, SoapUi Pro, Curl, and Alertsite API monitoring
Q. What is SOAP?
The term SOAP refers to Simple Object Access Control. In simple terms, it is an XML based protocol that helps in exchanging information among computers.
Q. What’s the procedure to test API’s?
For testing API’s one must follows the below-mentioned steps:
1. Make a selection of the suite you like to add the API test case to
2. Now choose the test development mode
3. Next demands the development of test cases for the required API methods
4. After this you need to configure the control parameters of the application and then test conditions
5. Once done with all the previous steps, configure method validation
6. Now is the time for execution of the API test
7. After this you can check test reports and filter API test cases
8. Last but not the least, sequence all API test cases. That’s it!
Q. What is REST API?
REST API is a set of functions helping developers in performing requests along with receiving responses. Through HTTP protocol interaction is made in REST API.
The term REST refers to Representational State Transfer. In very short span of time, it has become an effective standard for API creation.
Q. What are the areas that need to be taken care of while writing API document?
The main areas that need your concentration while writing API documents area as follows:
1. You need to check the source of the content
2. Plan or sketch of your document
3. Delivery layout of the same
4. Information needed for each of the function available in the document
5. Lastly, automatic document creation programs
If you're looking for API testing Interview Questions for Experienced or Freshers, you are at right place. Mindmajix offers Advanced API testing Interview Questions 2018 that helps you in cracking your interview & acquire dream career as API testing Developer.



The Best Docker Interview Questions & Answers ... - Mindmajix

Essential Docker Interview Questions 2018-Learn Now!
Q1) What is Docker?
Docker can be defined as Containerization platform that packs all your applications, all the necessary dependencies combined to form containers. This will not only ensure the applications work seamlessly given any environment but also provides better efficiency to your Production ready applications. Docker wraps up bits and pieces of software with all the needed filesystems containing everything that needs to run the code, provide the runtime, system tools / libraries. This will ensure that the software is always run and executed the same, regardless of the environment.
Containers run on the same machine sharing the same Operating system Kernel, this makes it faster – as starting the applications is the only time that is required to start your Docker container (remember that the OS Kernel is already UP and running and uses the least of the RAM possible).
Q2) What is the advantage of Docker over hypervisors?
Docker is light weight and more efficient in terms of resource uses because it uses the host underlying kernel rather than creating its own hypervisor.
Q3) How is Docker different from other container technologies?
To start with, Docker is one of the upcoming and is a fresh project. Since its inception has been done in the Cloud era, it is way better many of the other competing Container technologies which have ruled their way until Docker came into existence. There is an active community that is running towards the better upbringing of Docker and it has also started extending its support to Windows and Mac OSX environments in the recent days. Other than these, below are the best possible reasons to highlight Docker as one of the better options to choose from than the existing Container technologies.
• There is no limitation on running Docker as the underlying infrastructure can be your laptop or else your Organization’s Public / Private cloud space
• Docker with its Container HUB forms the repository of all the containers that you are ever going to work, use and download. Sharing of applications is as well possible with the Containers that you create.
• Docker is one of the best documented technologies available in the Containerization space.
Q4) What is Docker image?
Docker image can be understood as a template from which Docker containers can be created as many as we want out of that single Docker image. Having said that, to put it in layman terms, Docker containers are created out of Docker images. Docker images are created with the build command, and this produces a container that starts when it is run. Docker images are stored in the Docker registry such as the public Docker registry ( as these are designed to be constituted with layers of other images, enabling just the minimal amount of data over the network.
Q5) What is Docker container?
This is a very important question so just make sure you don’t deviate from the topic and I will advise you to follow the below mentioned format:
1. Docker containers include the application and all of its dependencies, but share the kernel with other containers, running as isolated processes in user space on the host operating system. Docker containers are not tied to any specific infrastructure: they run on any computer, on any infrastructure, and in any cloud.
2. Now explain how to create a Docker container, Docker containers can be created by either creating a Docker image and then running it or you can use Docker images that are present on the Dockerhub.
3. Docker containers are basically runtime instances of Docker images.
Q6) What is Docker hub?
Docker hub is a cloud-based registry service which allows you to link to code repositories, build your images and test them, stores manually pushed images, and links to Docker cloud so you can deploy images to your hosts. It provides a centralized resource for container image discovery, distribution and change management, user and team collaboration, and workflow automation throughout the development pipeline.
Q7) What is Docker Swarm?
Docker Swarm can be best understood as the native way of Clustering implementation for Docker itself. Docker Swarm turns a pool of Docker hosts into a single and virtual Docker host. It serves the standard Docker API or any other tool that can already communicate with a Docker daemon can make use of Docker Swarm to scale in a transparent way to multiple hosts. Following are the list of some of the supported tools that will be helpful in achieving what we have discussed just now.
• Dokku
• Docker Compose
• Docker Machine
• Jenkins
Q8) What is Dockerfile used for?
Dockerfile is nothing but a set of instructions that have to be passed on to Docker itself, so that it can build images automatically reading these instructions from that specified Dockerfile. A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Using docker build users can create an automated build that executes several command-line instructions in succession.
Q9) Can I use JSON instead of YAML for my compose file in Docker?
YES, you can very comfortably use JSON instead of the default YAML for your Docker compose file. In order to use JSON file with compose, you need to specify the filename to use as the following:
docker-compose -f docker-compose.json up
Q10) Tell us how you have used Docker in your past position?
This is a question that you could bring upon your whole experience with Docker and if you have used any other Container technologies before Docker. You could also explain the ease that this technology has brought in the automation of the development to production lifecycle management. You can also discuss about any other integrations that you might have worked along with Docker such as Puppet, Chef or even the most popular of all technologies – Jenkins. If you do not have any experience with Docker itself but similar tools from this space, you could convey the same and also show in your interest towards learning this leading containerization technology.
If you're looking for Docker Interview Questions for Experienced or Freshers, you are at right place. Mindmajix offers Docker Interview Questions 2018 that helps you in cracking your interview & acquire dream career as Docker Developer.

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