Jio Haptik Senior Software Engineer and Lead Interview Questions and Answers

Q1. Problems related to Binary Search
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Q2. Problem statement on BST
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Starts with an online assessment test on HackerRank. Expect a LeetCode Medium question most of the time, mostly created by HackerRank.

Q1. LC medium related to dynamic programming.
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Q2. LC easy related to heaps.
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Q1. LC medium-hard, don't remember the category.
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Q1. This was a design round. You can expect to be asked to design the DB schema and API endpoints for a well-known use case. Interviewer was super helpful and receptive throughout. While getting to an agreeabl...read more
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Q1. Hiring manager round. Mostly discussions about your profile, discussion on past projects from your resume. You can do well in this round if you know your basics and can explain your projects to some depth....read more
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Q1. Reverse a linked list
Ans. 
Reverse a linked list by changing the direction of pointers
• Start with three pointers: current, previous, and next

• Iterate through the linked list, updating pointers to reverse the direction

• Update the head of the linked list to be the last node visited
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Building small UI screen application in 1 hr for frontend developer

Q1. Graph traversal question
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Q2. React js questions
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Q3. Javascript output guessing question
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Q1. What is promise
Ans. 
A promise is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used in JavaScript to handle asynchronous operations.

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

• Promises can be chained using .then() to handle success and failure callbacks.

• Example: Fetching data from an API returns a promise that resolves with the data or rejects with an error.
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Q2. What is hoisting
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Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variable and function declarations are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations take precedence over variable declarations.
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Q1. What is event loop
Ans. 
Event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for and handling events.
• Event loop is commonly used in JavaScript to handle asynchronous operations like setTimeout, setInterval, and AJAX requests.

• It allows for non-blocking I/O operations, ensuring that the program can continue running while waiting for I/O operations to complete.

• Event loop works by contin...read more
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Q1. Need to find output of given code
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Q2. Solve some puzzles
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I was asked to implement lru cache which i did but still didn’t made to next round as apparently i didn’t complete the working code though in my opinion i did