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Grunt Interview Questions

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by Ravindra Savaram
Last modified: July 17th 2021

If you're looking for Grunt Interview Questions for Experienced or Freshers, you are in right place. There are a lot of opportunities from many reputed companies in the world. According to research Grunt has a market share of about 70.3%. So, You still have the opportunity to move ahead in your career in Grunt Development. Mindmajix offers Advanced Grunt Interview Questions 2021 that help you in cracking your interview & acquire a dream career as Grunt Developer.

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Frequently Asked Grunt Interview Questions and Answers

  1. What is Grunt?
  2. Where exactly is Grunt used in JavaScript?
  3. How popular Grunt is right now? Do you have any idea?
  4. Does Grunt automate tasks that programmers perform?
  5. What exactly do you know about the configuration of Grunt?
  6. Mention a few stages where you will use the Grunt?
  7. Explain the distribution of plug-ins in the Grunt?
  8. Is it possible to run two different versions of Grunt on the system at the same time?
  9. What is the significance of a task in Grunt? Name any two tasks that you can define
  10. Name a few commonly used Grunt plug-ins?

1. Where exactly is Grunt used in JavaScript?

Grunt is basically b helping tool that aims to cut down the code. Basically, it is used when there is a need to call functional or similar tasks again and again. The code can be made extremely simpler and the best part is programmers can easily keep up the pace all the time irrespective of the tasks they perform. Because JavaScript is an approach that can be considered for a lot of applications, users need not worry about anything. 

2. What are the factors that you should pay attention to when it comes to using Grunt?

Well, the very first thing is the latest version of the tool. When it comes to getting error-free results, it is necessary that programmers pay attention to the version of the tool. Having the latest version of Java or grunt eliminates all the probabilities of error and simply makes sure of best-written code. 

3. What is Grunt?

It is basically considered as one of the best JavaScript task runners that come with a lot of features and functionality. Users can get access to features that are beyond their imagination while working on a project. 

Well, Grunt is a managing tool that is even used in large-scale corporations in the present scenario. It has also been recognized as one of the best tools in its class by a lot of experts that are responsible for testing. There are other factors such as reliability that have contributed to its success. When it comes to accuracy, Grunt can simply be trusted for any kind of project without worrying about anything. 

5. Does Grunt automate tasks that programmers perform?

Yes, Grunt is capable to automate so many tasks that assure outcomes free from any form of bugs that is the prime requirement in the IT sector presently. Organizations have to spend a very large sum of money on testing the projects. Grunt always makes sure that the same can be reduced up to a possible extent. 

6. What is the prime motive of using this approach according to you and it can be beneficial in the long run?

Grunt has got a lot of favorable results after its introduction. Its prime motive is to automate various important tasks. Programmers and developers can always make sure of simple compilation as well as testing of the tasks that are time-consuming and often have errors in them.

7. What exactly do you mean by the term “Minification” in JavaScript? What is its significance?

Well, the fact is coding is the basis of any project based on computer languages. While writing the codes, there is a need to repeat the tasks frequently such as calling a function again and again. Grunt cut down this issue simply by making this easier and time-saving. This is exactly what is considered minification. This approach basically enables developers to save their valuable time and organizations can simply save a large sum of money on large-scale projects. This is exactly why it is considered relevant. 

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8. Is it possible to check JS errors with the help of Grunt?

Yes, it can simply be done. Most of the time Grunt performs this task automatically and without the interference of the user. However, it is possible to customize the results by applying various filters in case the need for the same is felt. The chance of occurrence of errors after Grunt is considered as very less. 

9. What do you mean by Unit Testing in JavaScript? Does Grunt have any application with it?

A project is built in many sections and in fact by different teams. The outcome of every team is considered as a unit. The unit can also be a part of any project based on computer language. Each unit is tested before it is integrated with the final project. In Java, there is a separate approach for this that can simply be considered. Grunt plays an important role by check each unit one after one when it is used. Thus, the outcomes are always superior. 

10. What is the role of the Node.Js package manager with the implementation of Grunt?

A grunt is a popular approach. Before using it, obviously, it needs to be installed just like any other application. The Node.js package manager along with an npm is responsible for the proper installation of Grunt, as well as Grunt plug-in. The following command is helpful in this matter. 

npm install grunt --save-dev

11. What exactly do you know about the configuration of Grunt?

Grunt can be installed through Node.Js and after the installation is complete, users need to perform a basic step for its final configuration and i.e. adding two different files in it. These are:

1. Gruntfile.js
2. Package.json


Grunt files make sure of the configuration of tasks while on the other side the task of package.json is to store the metadata used by the project.

12. Explain the role of --save-dev the option. Where it is used?

This option is used while installing the Grunt. When this option is enabled during the installation, it automatically adds the metadata to the package.json. It is also possible to add it manually for getting desirable results or in case you only need to use a part of the metadata for the final outcome. This is actually a common approach while handling small-scale projects. 

13. Is it possible to run the multiple tasks together in Grunt?

Yes, this can be done. Generally, developers can save a lot of time with the help of this approach.

14. On Node.js, where exactly can you find the Grunt?

It is basically written on the top of the Node.Js 

15. Mention a few stages where you will use the Grunt?

It can be used for the following situations and purposes

  1. Concatenating the given files
  2. Test running
  3. Running JShint
  4. Script minimization

In addition to this, there are lots of purposes and tasks where this approach is considered depending upon the motive and the type of outcome required. 

16. If you see a tilde sign in package.json, what does it actually means?

It basically represents that there is a need to update the package or the application. The same can be done after its appearance. Basically, it is an indicator to let the user know that there is a new version available now and the existing one can simply be updated to the latest package. 

17. What is the other name of the plugins in the Grunt?

They are also known as Grunt modules.

18. Explain the distribution of plug-ins in the Grunt?

Well, they are distributed with the help of the NPM directory. Most of the time they are prefixed with the grunt however, it is possible to use them separately or for another purpose very simply. Users need not worry about anything. There is not always a need to call the entire directory in case only one plug-in is required. Also, installing the Grunt doesn’t always mean you need to install all the plug-ins at the same time. They can be installed later when the need for the same is felt. 

19. Can you write a basic command for the installation of the Grunt Plugin? Can it also be installed without writing a code?

The following command can be executed for this purpose

npm install --save-dev


Yes, it is possible to install the same without the command. However, the method is time-consuming and can interrupt the primary tasks users are performing at the same time. Thus command approach is preferred. However, the same may vary slightly depending upon the type of plug-in you need to install and use. 

20. In Grunt, what if you need a recent version of a plug-in and not the latest one. What can be done about this?

Well, if the installation of the plug-in is considered by default, it always installs the latest version available. However, the fact that there can be a need for the previous version anytime cannot be denied. To install the same, a manual procedure can be adopted. This can be done by mentioning the same in the command and the installation will be after that.

21. What is the command that you need to execute removing the Grunt?

The following command can be executed for this
npm uninstall grunt
It must be noted that if you are using the Grunt for a long time, there is always a need for you to remove some files manually from the memory after the installation of the Grunt. Not all the files are necessary to be removed when you uninstall the Grunt from the system.

22. What exactly do you know about Grunt-cli? Explain its significance?

It is basically nothing but a command-line interface that is considered in the Grunt for running the commands. It can also be defined as a tool that is used for accessing the Grunt from the command line. There is no strict upper limit on the location. It can be accessed from any location simply.

23. Is it possible to run two different versions of Grunt on the system at the same time?

Yes, it’s possible. There are actually two components available that can be considered for this task. The legacy version or component is a popular one that is used when modifications are required in the old projects. The Grunt-cli is helpful in making it possible to run two different versions at the same time.  

24. Mention the procedure of how Gruntfile.js can make use of package.json

First, the task configuration needs to be specified simply in the grunt file. Next is to enable the grunt to read the information from the package and save it. It simply enables the Grunt to use the attributes from the package.json file. 

25. In the Grunt final output, it is possible to assign any name to the file or it needs to be chosen from default?

It can be assigned any name provided no other file with a similar name already exists. 

26. It is possible for the users or Grunt to override the default settings of the plug-in they install. How can this be done??

Yes, it is possible to do this simply. For this, a user can simply specify the options property. As every target has an options property, the task can simply be accomplished in no time. 

27. What is the significance of a task in Grunt? Name any two tasks that you can define

Tasks are very closely associated with the Grunt. They can be considered as an integral part of this approach. The fact is whenever you run a Grunt, there is a need for you to specify the task which makes the grunt familiar with the task that you want to perform. It is possible simply to specify more than one task. Examples of tasks are:
>> Uglify
>> Concat

28. Is it possible for users to load the plug-in of grunt in the Gruntfile.js?

Yes, this can be done easily. The following command can be executed for this

grunt.loadNpmTasks('grunt-contrib-uglify');

You need to make sure before executing this command that the plug-ins you are loading are already installed otherwise you will get an error message. 

29. Can you state the difference between the two popular options in Grunt and i.e. –save and –save-dev?

There are two dependencies sections in Grunt and they are used for adding packages and for adding the section. Both these actions are performed by these options. If these options are not used, the data will not be saved at its default positions and needs to be uploaded again and again which consumes a lot of time. 

30. Name a few commonly used Grunt plug-ins?

  1. jshint
  2. Concat
  3. Less
  4. Uglify
  5. watc
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About Author

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NameRavindra Savaram
Author Bio

Ravindra Savaram is a Content Lead at Mindmajix.com. His passion lies in writing articles on the most popular IT platforms including Machine learning, DevOps, Data Science, Artificial Intelligence, RPA, Deep Learning, and so on. You can stay up to date on all these technologies by following him on LinkedIn and Twitter.