Velocis Systems Engineer Trainee Interview Questions and Answers

Q1. Questions from past projects
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Q2. Questions from Process
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Q1. Java hash map and how it works
Ans. 
Java hash map is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values based on keys.
• HashMap in Java implements the Map interface and allows null keys and values.

• It uses hashing to store and retrieve key-value pairs, providing O(1) time complexity for get() and put() operations.

• Example: HashMap map = new HashMap<>(); map.put("key", 1); int value = map.get("key");
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When I was join there no assignment I think now they conducting

Q1. Check the basic knowledge of our skills
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Q2. Need write programs
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Q1. Check the in-depth knowledge about our work
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Q1. Discuss salary details
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Q1. General Java, springboot and oops
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Q1. Managerial round with Technical Lld and design related questions
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Q1. Client round technical LLD AND HLD questions
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Q1. HR discussion about salary and client details
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Q1. 1.polyfill map, currying vs closure, reduce method, explain this?, 2.what is lazyload and suspense, single thread vs multi thread, Event loop(task queue & microtask queue)?
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Q2. Explain redux? Redux vs context api? ES6 features? Rest vs Spread? null vs undefined?
Ans. 
Redux is a predictable state container for JavaScript apps.
• Redux is a state management library for JavaScript applications.

• It helps in managing the state of an application in a predictable way.

• Redux follows a unidirectional data flow pattern.

• Context API is a built-in feature of React that can be used for state management, but it is not as powerful as Redux.

• ES6 features include arrow functions, template literals, destru...read more
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Output based question regarding shallow and deepcopy related to object.
write a program for i/p: "This is the JS guide, developer!" o/p: "sihT si eht SJ ,ediug !repoleved"
react timer based output start, stop and reset.

Q1. About resume and experience
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Q1. Questions based in on experience
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Q1. Salary discussion and joining details
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