devtools.tech | The only way to prepare for frontend interviews

Ultimate Guide to Crack Frontend System Design Interviews

How to create a flat version of a deeply nested array? [Programming Interview Question]

14356

How to build a custom timer hook in React.js? | useTimer | JavaScript Interview Question

14823

Build A Mini Clone Of Google Calendar | Frontend Coding Challenge | JavaScript Interview Questions | DevKode DOM Challenge

HTML/CSS/JavaScript

10616

Implement Debounce Function | Flipkart UI - JavaScript Interview Questions

7511

Implement Accordion Component in React.js | JavaScript Interview Question

9325

How to implement Event Emitter in JavaScript? | Facebook Interview Question

10880

How to implement DOM like structure tree!? | Frontend Interview Question | Advanced JavaScript

6870

How to create OTP Input Component? | Frontend Coding Challege | JavaScript | HTML | CSS | React.js

HTML/CSS/JavaScript

7276

How to build a File Explorer? Atlassian Frontend Machine Coding Round Question | JavaScript Interview Question | React.js

HTML/CSS/JavaScript

16015

Build Country Capital Game | Microsoft Frontend Interview Question | JavaScript | React.js

HTML/CSS/JavaScript

10134

What would be the return value (if any)?

827

What is the output of the following code snippet? | JavaScript Fundamentals | Frontend Interview Question

6526

Can you identify the behaviour of following code snippet? | JavaScript Output Questions | Problem Solving | JavaScript Copy

7743

Is Fetch API part of JavaScript Engine or JavaScript Runtime?

6285

What would be the output of the following code? (Based on Spread Operator)

6478

What would be the output of the following code? (Based on Array Slice)

5129

Which function is used to serialize an object into a JSON string in Javascript?

5046

What is the process in which an object or data structure is converted to series of bytes for easy storage or network transfer?

4427

What will be the output of the following code snippet? JavaScript Min, Max

4686

What is the use of the <noscript> tag in Javascript?

HTML/CSS/JavaScript

4210

How the comparison happens with switch cases in JavaScript?

4342

Which of the following keywords are used to define a variable in JavaScript?

3293

What is the paradigm of JavaScript language?

5427

What is the output of the following code? - Promise Scheduling | Event Loop | JavaScript Quiz

10139

What does this function print? JavaScript Quiz | Interview Question

7309

What is the output of the following code snippet? | JavaScript Fundamentals

4375

What would be the output? [JavaScript Inheritance]

5845

What would the output of the following code snippet? [Promises in JavaScript]

10934

What would be the output of the following code? [Scoping in JavaScript]

5855

What would be the output? [Object Destructuring]

4487

What would be the output of the following code snippet? [Prototypes & Scopes]

4056

What would be the output of the following code snippet? [ES6 Classes]

4489

What would be the output? [New Operator | Explicit Primitive Return]

4424

What would be the output? [New Operator | Explicit Non Primitive Return]

4162

What would be the output? (Different ways of Prototype calls)

3799

What do you think would be the output? [HTML Collection | NodeList]

4596

What will be the output of the following code snippet? (in operator)

6638

What is the output of the following? (Exotic Array Objects JavaScript)

3991

Switch Statement Output

4164

Difference between Defer and Async keywords?

HTML/CSS/JavaScript

4030