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Cars24 Software Development Engineer 2 Interview Experience

Software Development Engineer 2

Cars24
June 10, 2025
14 Questions
Selected

Summary

AI Powered

The Cars24 Frontend Software Development Engineer 2 interview process consisted of one round focused on technical questions related to JavaScript and React Native. Candidates can expect to answer questions on JavaScript fundamentals, as well as React and React Native concepts such as hooks, components, and performance optimization. Overall, the interview appears to assess both foundational knowledge and practical skills in frontend development comprehensively.

1

ROUND 1

#1

Difference Between let, var, and const

Explain the differences between let, var, and const in JavaScript, including scopes and hoisting behaviors.
javascript
variables
frontend
Easy
#2

Working of Hoisting with var and let

How does hoisting work concerning var and let declarations in JavaScript? Provide an example for clarity.
javascript
hoisting
Medium
#3

Data Types in JavaScript

How many data types are there in JavaScript? Differentiate between primitive and non-primitive data types.
javascript
data-types
Easy
#4

Spread Operator vs. Rest Operator

Explain the difference between the spread operator and the rest operator in JavaScript, illustrating each with examples.
javascript
operators
Medium
#5

Shallow Copy vs. Deep Copy

Define shallow copy and deep copy in JavaScript. Provide an example to illustrate the difference, especially in the context of object cloning.
javascript
copy
Medium
#6

Debouncing and Throttling

What are debouncing and throttling in JavaScript? Highlight the differences and provide a real-world use case for throttling.
javascript
performance
Medium
#7

Class Components vs. Functional Components

Do you utilize class components in React? If so, explain how they differ from functional components.
react
components
Medium
#8

List of React Hooks

Enumerate all available React hooks and provide examples for their use.
react
hooks
Medium
#9

Rules for Using Hooks

What are the rules associated with using hooks in React? Discuss any limitations or common pitfalls.
react
hooks
Medium
#10

useEffect Usage

Explain the use of useEffect in React. Give an example along with its equivalent lifecycle methods.
react
hooks
lifecycle
Medium
#11

Custom Hooks Use

Where else can predefined hooks be utilized beyond functional components in React? Provide details regarding custom hooks.
react
hooks
Medium
#12

React.memo Mechanism

What is React.memo? How does its second parameter work, and how can it prevent unnecessary re-renders when prop values change?
react
performance
Medium
#13

FlatList vs. ScrollView in React Native

What are the differences between FlatList and ScrollView in React Native? Explain when you would use each component.
reactnative
components
Medium
#14

useEffect Return Function

Apart from component unmounting, when else does the return function inside useEffect get invoked in React? Discuss scenarios.
react
hooks
Medium
frontendjavascriptreactreactnativeinterviewexperiencesoftwareengineersoftwaredevelopercars24webdevelopmentinterviewtipscareergrowthcars24
r

ritwik chakraborty

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