133 Advanced Javascript Interview Questions For Experienced 2024

133 Advanced Javascript Interview Questions For Experienced. If you are preparing for javascript job interview, these real-time javascript interview questions will help freshers and experienced to crack the javascript job. Read Now.!

Table of Contents

Javascript Interview Questions

Between JavaScript and an ASP script, which is faster?
Can you access Cookie using javascript?
Can you assign a anonymous function to a variable?
Can you pass a anonymous function as an argument to another function?
Define unescape() and escape() functions?
Describe the properties of an anonymous function in JavaScript?
Does JavaScript support automatic type conversion?
Enumerate the differences between Java and JavaScript?
Explain how can you submit a form using JavaScript?
Explain how to detect the operating system on the client machine?
Explain how to read and write a file using JavaScript?
Explain the difference between “==” and “===”?
Explain the for-in loop?
Explain the role of deferred scripts in JavaScript?
Explain the unshift() method ?
Explain the working of timers in JavaScript? Also elucidate the drawbacks of using the timer, if any?
Explain what is pop()method in JavaScript?
Explain window onload and onDocumentReady?
Give an example of closure?
How are DOM utilized in JavaScript?
How are event handlers utilized in JavaScript?
How are JavaScript and ECMA Script related?
How are object properties assigned?
How are object properties assigned?
How can a page be forced to load another page in JavaScript?
How can a particular frame be targeted, from a hyperlink, in JavaScript?
How can a value be appended to an array?

Advanced Javascript Interview Questions

How can JavaScript codes be hidden from old browsers that don’t support JavaScript?
How can the OS of the client machine be detected?
How can the style/class of an element be changed?
How can you convert the string of any base to integer in JavaScript?
How can you create an Array in JavaScript?
How can you create an Object in JavaScript?
How can you get the reference of a caller function inside a function?
How can you get the total number of arguments passed to a function?
How can you get the type of arguments passed to a function?
How can you read properties of an Object in JavaScript?
How generic objects can be created?
How many types of functions JavaScript supports?
How to create a Cookie using JavaScript?
How to define a anonymous function?
How to delete a Cookie using JavaScript?
How to find operating system in the client machine using JavaScript?
How to handle exceptions in JavaScript?
How to print a web page using javascript?
How to read a Cookie using JavaScript?
How to read elements of an array in JavaScript?
How to redirect a url using JavaScript?
How typeof operator works?

Scenario Based Javascript Interview Questions

How will you explain closures in JavaScript? When are they used?
Is it possible to break JavaScript Code into several lines?
Is JavaScript a case-sensitive language?
Is JavaScript case sensitive? Give an example?
Mention what is the disadvantage of using innerHTML in JavaScript?
Name some of the JavaScript features.
What are all the looping structures in JavaScript?
What are all the types of Pop up boxes available in JavaScript?
What are disadvantages of using JavaScript?
What are escape characters?
What are global variables? How are these variable declared and what are the problems associated with using them?
What are JavaScript Cookies?
What are JavaScript Data Types?
What are Screen objects?
What are the advantages of using JavaScript?
What are the decodeURI() and encodeURI()?
What are the different types of errors in JavaScript?
What are the two basic groups of dataypes in JavaScript?
What are the valid scopes of a variable in JavaScript?
What are the variable naming conventions in JavaScript?
What are the various functional components in JavaScript?
What are undeclared and undefined variables?
What boolean operators can be used in JavaScript?
What do mean by NULL in Javascript?
What does the following statement declares?
What is ‘this’ keyword in JavaScript?
What is === operator?

Real Time Javascript Interview Questions

What is a named function in JavaScript? How to define a named function?
What is a prompt box?
What is an undefined value in JavaScript?
What is arguments object in JavaScript?
What is break and continue statements?
What is callback?
What is called Variable typing in Javascript?
What is closure?
What is Date object in JavaScript?
What is JavaScript?
What is JavaScript?
What is namespacing in JavaScript and how is it used?
What is negative infinity?
What is Number object in JavaScript?
What is purpose of onError event handler in JavaScript?
What is the ‘Strict’ mode in JavaScript and how can it be enabled?
What is the data type of variables of in JavaScript?
What is the difference between an alert box and a confirmation box?
What is the difference between call() and apply()?
What is the difference between JavaScript and Jscript?
What is the difference between ViewState and SessionState?
What is the function of delete operator?

Essential Javascript Interview Questions

What is the method for reading and writing a file in JavaScript?
What is the purpose of ‘this’ operator in JavaScript?
What is the role of break and continue statements?
What is the use of blur function?
What is the use of isNaN function?
What is the use of Push method in JavaScript?
What is the use of type of operator?
What is the use of Void(0 )?
What is the way to get the status of a CheckBox?
What is unshift method in JavaScript?
What is variable typing?
What typeof returns for a null value?
Whether JavaScript has concept level scope?
Which built-in method adds one or more elements to the end of an array and returns the new length of the array?
Which built-in method calls a function for each element in the array?
Which built-in method combines the text of two strings and returns a new string?
Which built-in method removes the last element from an array and returns that element?
Which built-in method returns the calling string value converted to lower case?
Which built-in method returns the calling string value converted to upper case?
Which built-in method returns the character at the specified index?
Which built-in method returns the characters in a string beginning at the specified location?
Which built-in method returns the index within the calling String object of the first occurrence of the specified value?
Which built-in method returns the length of the string?
Which built-in method returns the string representation of the number’s value?

Latest Javascript Interview Questions

Which built-in method reverses the order of the elements of an array?
Which built-in method sorts the elements of an array?
Which company developed JavaScript?
Which keyword is used to print the text in the screen?
Which keywords are used to handle exceptions?
Which symbol is used for comments in Javascript?
Which type of variable among global and local, takes precedence over other if names are same?
Why it is not advised to use innerHTML in JavaScript?
Write about the errors shown in JavaScript?
Write the code for adding new elements dynamically?
Write the point of difference between web-garden and a web-farm?

Source: Guru99

Advanced Javascript Interview Questions For Experienced