Bajaj Finserv React Developer Interview Questions and Answers

Test has three questions

Q1. Introduce yourself
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Q2. Why would we hire you?
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Q1. What is a Java and how many types are there
Ans. 
Java is a high-level programming language used for developing applications. There are four types of Java: Java SE, Java EE, Java ME, and JavaFX.
• Java is an object-oriented language.

• Java SE (Standard Edition) is used for general-purpose development.

• Java EE (Enterprise Edition) is used for developing enterprise applications.

• Java ME (Micro Edition) is used for developing applications for small devices.

• JavaFX is used for cr...read more
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Q2. Tell the permitted Java type
Ans. 
The permitted Java types include primitive types (int, double, boolean, etc.) and reference types (String, Object, etc.)
• Primitive types are predefined in Java and start with a lowercase letter (e.g., int, double)

• Reference types are created using classes, interfaces, or arrays (e.g., String, Object, int[])

• Java also supports autoboxing, which allows primitive types to be used as reference types (e.g., Integer, Double)
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Q3. Tell the Java coding
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Java is a popular programming language used for developing web applications and software.
• Java is an object-oriented language

• It is platform-independent

• Java code is compiled into bytecode

• Java has a vast library of pre-built classes and methods

• Java is used for developing Android apps
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Q1. It was a good technical mostly on the JAVA side.
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Q1. Diff btwn this and arrow in javascript
Ans. 
The 'this' keyword in JavaScript refers to the current object, while the arrow function does not bind its own 'this'.
• The 'this' keyword in JavaScript refers to the object that is executing the current function.

• Arrow functions do not bind their own 'this' value, instead they inherit the 'this' value from the enclosing lexical context.

• Using 'this' in a regular function can lead to unexpected behavior, especially in neste...read more
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Q2. Diff btwn let, var, const
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let, var, and const are all used to declare variables in JavaScript, but they have different scopes and behaviors.
• let is block-scoped and can be reassigned, var is function-scoped and can be reassigned, const is block-scoped and cannot be reassigned

• Using let:

• let x = 10;

• x = 20; // valid

• Using var:

• var y = 5;

• y = 8; // valid

• Using const:

• const z = 15;

• z = 25; // error, cannot reassign const variable
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Q1. What are the hooks you used?
Ans. 
I have used useState, useEffect, useContext, and useRef hooks in my projects.
• useState - for managing state in functional components

• useEffect - for handling side effects in functional components

• useContext - for accessing context in functional components

• useRef - for accessing DOM elements or storing mutable values
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Q2. Complete details of last project worked
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3 coding questions related to dp and graph

Q1. Round 1 1.Basic JS question 2.Tricky indepth question who answer you would have to logically conclude/ educative guess Eg: 3. Why class are in React immutable but props mutable What happens to local sess...read more
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1.Complex coding round.
2.Explain any independent project you have done