Wepsol Senior Software Engineer Interview Questions and Answers for Experienced

Q1. What is typescript
Ans. 
TypeScript is a superset of JavaScript that adds static typing and other features to help developers write more robust code.
• TypeScript is developed and maintained by Microsoft.

• It compiles down to plain JavaScript.

• It helps catch errors at compile time rather than runtime.
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Q1. What are 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 are commonly used in event handlers, callbacks, and asynchronous programming.

• Closures help in maintaining state in functional programming.
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Q2. What is virtual DOM
Ans. 
Virtual DOM is a lightweight copy of the actual DOM used for efficient updates in web development.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• When changes are made to the virtual DOM, a comparison is done with the actual DOM to determine the minimal updates needed.

• This approach reduces the number of costly DOM operations, resulting in faster rende
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Q3. What are the data types in JS
Ans. 
Data types in JavaScript include number, string, boolean, object, function, undefined, and null.
• Number - represents numeric data, e.g. 10, 3.14

• String - represents textual data, e.g. 'hello', '123'

• Boolean - represents true or false values, e.g. true, false

• Object - represents complex data structures, e.g. { key: 'value' }

• Function - represents executable code, e.g. function() { }

• Undefined - represents a variable that has ...read more
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Q1. Write react code for counter
Ans. 
React code for a simple counter
• Create a functional component for the counter

• Use useState hook to manage the count state

• Render the count value and buttons to increment and decrement the count
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Q1. Salary discussion
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Q1. They just asked basic questions on jave
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Q2. And basic database questions
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Q1. Basic java and database questions
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Basic Apti questions

Basic Java Coding test

Q1. Basic JAVA fundamentals
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Q1. What are the OOPS concepts
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Q2. MultiThreading, synchronization
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Q1. Tell me about yourself
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Q1. OOPS Basic Questions and examples
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Q2. Microservices Related questuons and examples
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Genric aptitude test

Q1. About yourself and your achievements
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Q2. About your hobbies and interests
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