QBurst Technologies Software Engineer Interview Questions, Process, and Tips

2 Easy coding questions and one medium coding question.

Q1. Questions from projects on resume
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Q1. What are promises in Nodejs
Ans. 
Promises in Node.js are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in a more readable and manageable way.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Example: const myPromise = new Promise((resolve, reject) => { ... });
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Q2. What is temporal dead zone
Ans. 
Temporal dead zone is the period between entering scope and being able to access a variable.
• Occurs when trying to access a variable before it has been declared

• Caused by hoisting in JavaScript

• Results in a ReferenceError

• Example: accessing a let or const variable before its declaration
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Q1. What is prototype chaining?
Ans. 
Prototype chaining is the mechanism in JavaScript where an object inherits properties and methods from another object.
• In JavaScript, each object has a prototype property which points to another object. When a property is accessed on an object, if it doesn't exist on the object itself, JavaScript looks for it in the prototype chain.

• If the property is not found in the immediate prototype, JavaScript continues to look up ...read more
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Q2. What is merkle root in Blockchain?
Ans. 
Merkle root is a hash value generated by hashing all the transactions in a block in a blockchain.
• Merkle root is used to efficiently verify the integrity of the transactions in a block.

• It is calculated by hashing the individual transactions in the block, then pairing and hashing those results until a single hash remains.

• Any change in the transactions will result in a different merkle root.

• Example: In a block containing ...read more
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4-5 questions easy to medium level

Q1. About your projects and their working.
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Coding round with 5 questions based on data structures and string operations

Q1. Stack Queue String Project
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Q1. Loops Why join Qburst
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