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JavaScript Interview Questions  for Freshers

JavaScript Interview Questions for Freshers

If you're just starting out in your development career and are looking for answers to basic interview questions for a Junior JavaScript Developer, this publication is for you. 

JavaScript Interview Questions for Freshers

Delve into the basics of JavaScript and confidently go through the interview process, solidifying your skills and willingness to take on the challenge of development.

#1  What are the different data types present in javascript?

#2  Explain Hoisting in javascript.

#3 Why do we use the word “debugger” in javascript?

#4 Difference between “ == “ and “ === “ operators.

#5 Difference between var and let keyword in javascript.

#6 Explain Implicit Type Coercion in javascript.

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#7 Is javascript a statically typed or a dynamically typed language?

#8 What is NaN property in JavaScript?

#9 Explain passed by value and passed by reference.

#10 What is an Immediately Invoked Function in JavaScript?

#11 What do you mean by strict mode in javascript and characteristics of javascript strict-mode?

#12 Explain Higher Order Functions in javascript.

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#13 Explain “this” keyword.

#14 What do you mean by Self Invoking Functions?

#15 Explain call(), apply() and, bind() methods.

#16 What is the difference between exec () and test () methods in javascript?

#17 What is currying in JavaScript?

#18 What are some advantages of using External JavaScript?

#19 Explain Scope and Scope Chain in javascript.

#20 Explain Closures in JavaScript.

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#21 Mention some advantages of javascript.

#22 What are object prototypes?

#23 What are callbacks?

#24 What are the types of errors in javascript?

#25 What is memoization?

#26 What is recursion in a programming language?

#26 What is recursion in a programming language?

#27 What is the use of a constructor function in javascript?

#28 What is DOM?

#29 Which method is used to retrieve a character from a certain index?

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#30 What do you mean by BOM?

#31 What is the distinction between client-side and server-side JavaScript?

#32 What are arrow functions?

#33 What do mean by prototype design pattern?

#34 Differences between declaring variables using var, let and const.

#35 What is the rest parameter and spread operator?

#36 In JavaScript, how many different methods can you make an object?

#37 What is the use of promises in javascript?

#38 What are classes in javascript?

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#39 What are generator functions?

#40 Explain WeakSet in javascript.

#41 Why do we use callbacks?

#42 Explain WeakMap in javascript.

#43 What is Object Destructuring?

#44 Difference between prototypal and classical inheritance

#45 What is a Temporal Dead Zone?

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#46 What do you mean by JavaScript Design Patterns?

#47 Is JavaScript a pass-by-reference or pass-by-value language?

#48 Difference between Async/Await and Generators usage to achieve the same functionality.

#49 What are the primitive data types in JavaScript?

#50 What is the role of deferred scripts in JavaScript?

#51 What has to be done in order to put Lexical Scoping into practice?What is the role of deferred scripts in JavaScript?

#52 What is the purpose of the following JavaScript code?

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#53 Guess the outputs of the following codes.

#54 Guess the outputs of the following code.

#55 Guess the output of the following code

#56 Guess the outputs of the following code

#57 Guess the outputs of the following code

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#58 Write a function that performs binary search on a sorted array.

#59 Implement a function that returns an updated array with r right rotations on an array of integers a.

#60 Write the code for dynamically inserting new components.

#61 Write the code given If two strings are anagrams of one another, then return true.

#61 Write the code given If two strings are anagrams of one another, then return true.

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#62 Write the code to find the vowels

#63 In JavaScript, how do you turn an Object into an Array []?

#64 What is the output of the following code?

Conclusion

It's important to note that during JavaScript interviews, there may not always be a single correct answer. Interviewers are interested in understanding your reasoning and thought process behind your answers, rather than just memorizing the correct solutions. 

Conclusion

Therefore, be prepared to explain your approach and reasoning during the interview.

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