Zazz IT Solutions React Native Developer Interview Questions and Answers

Aptitude test

Current affairs

Q1. Puzzle , sql related questions
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Basic Aptitude questions were there which I think anyone can clear.

2 easy level programming questions were asked.

Q1. Introduction, background, interest, vision.
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It was mostly on JavaScript

Q1. Focused on react
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Q1. Brief about project
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Cover topics like closures, classes, functions

Q1. Explain call bind apply
Ans. 
Call, bind, and apply are methods used to manipulate the value of 'this' in JavaScript functions.
• Call: Invokes a function with a specified 'this' value and arguments provided individually.

• Example: func.call(thisArg, arg1, arg2)

• Bind: Creates a new function that, when called, has a specified 'this' value and arguments provided one by one.

• Example: var newFunc = func.bind(thisArg, arg1, arg2)

• Apply: Invokes a function with ...read more
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Q2. Explain closures
Ans. 
Closures are functions that have access to variables from their containing scope even after the scope has closed.
• Closures allow functions to access variables from their outer function even after the outer function has finished executing.

• They help in maintaining state in asynchronous operations.

• Closures are commonly used in event handlers and callbacks.
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Aptitude test was easy but difficult

Q1. Technical questions linked list
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Q2. Array binary search Dp
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Coding test consists of easy to medium difficulty problems.

Q1. HashMap in java
Ans. 
HashMap in Java is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• HashMap is part of the Java Collections framework.

• It uses hashing to store key-value pairs, allowing for O(1) retrieval time on average.

• Keys in a HashMap must be unique, but values can be duplicated.

• Example: HashMap map = new HashMap<>(); map.put("key1", 1); int value = map.get("key1");
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Basic coding questions

Q1. Question about current project.
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Q2. Basic Java, spring questions
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Q1. Basic HR questions
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Q1. About java mainly
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Q1. What aspires you most
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Q2. Tell me about project
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