Entab Infotech Technical Support Engineer Interview Questions and Answers

Normal Aptitute test with logical reasoning.

Coding test around front end using react

Q1. Question on Binary trees: if symmetric, easy string question using hashmap
Add your answer
Q2. If we are hosting a live test how to show real time ranking, HLD for this and what algorithms can we use
Add your answer

Q1. Database schema design for a feature where user can be free, gold, platinum.
Add your answer

Q1. HLD for live rank dashboard for a live test where millions of users are doing test
Add your answer

Two Medium DSA problem to solve

Q1. Design scalable Streaming pipeline and
Ans. 
Design a scalable streaming pipeline for processing large volumes of data.
• Use a distributed streaming framework like Apache Kafka or Apache Flink for real-time data processing.

• Implement data partitioning and parallel processing to handle high data throughput.

• Utilize cloud services like AWS Kinesis or Google Cloud Pub/Sub for scalability and reliability.

• Include fault tolerance mechanisms like checkpointing and data repl...read more
Answered by AI
Add your answer

Q1. LLD round , write classes and its methods
Ans. 
Design classes for a simple library management system with methods for adding, borrowing, and returning books.
• Class Book: Attributes include title, author, ISBN, and availability status.

• Class User: Attributes include userID, name, and borrowedBooks (array of Book).

• Class Library: Methods include addBook(Book), borrowBook(User, Book), returnBook(User, Book).

• Example of addBook: library.addBook(new Book('1984', 'George Orw...read more
Answered by AI
Add your answer

Q1. Salary and benefits discussion
Add your answer

Basic aptitude questions

Linked list, array, tree and graph questions

Q1. What is react, diff between react and angular, deep copy shallow copy, hoisting, diff between props and state
Ans. 
React is a JavaScript library for building user interfaces. It is different from Angular in various ways.
• React is a library while Angular is a framework

• React uses virtual DOM while Angular uses real DOM

• React is more flexible and easier to learn than Angular

• Deep copy creates a new object with the same values while shallow copy creates a new reference to the same object

• Hoisting is a JavaScript mechanism where variables a...read more
Answered by AI
Add your answer
Q2. Implement custom hooks and array flat method
Ans. 
Implement custom hooks and array flat method
• Custom hooks are reusable functions that allow you to extract component logic into reusable functions

• Array flat method is used to flatten an array of nested arrays into a single array

• To implement custom hooks, create a function that uses the useState and useEffect hooks

• To implement array flat method, use the reduce method to flatten the array
Answered by AI
Add your answer

Got 2 medium level DSA questions in the coding test

Q1. Computer fundamentals
Add your answer
Q2. System Design Questions
Add your answer

Q1. Q1 difference between let and const
Add your answer
Q2. Q2 what are closures?
Add your answer
Q3. Q3. What is typeof null
Ans. 
typeof null returns 'object' in JavaScript.
• typeof null is 'object' in JavaScript

• This is a historical bug in JavaScript that has not been fixed for backward compatibility

• Example: console.log(typeof null) will output 'object'
Answered by AI
Add your answer

Q1. Q1. Find palindrome strings in an array of strings.
Ans. 
Finding palindrome strings in an array of strings.
• Iterate through each string in the array.

• For each string, check if it is equal to its reverse to determine if it is a palindrome.

• Store palindrome strings in a separate array or print them out.
Answered by AI
Add your answer
Q2. Q2. Explain debouncing with example.
Add your answer