Fortytwo Labs Interview Questions and Answers for Experienced

Simple java coding questions like * pattern ,Hashmap questions, sql,java mcq

Q1. Though it is Technical iterview they asked Two coding questions of leetcode easy level 1.valid parentheses 2.Happy number
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Q2. Asked the implementation of Hashmap ? Linked List Questions ?
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Q3. Fail Fast , Fail safe Iterator
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Q4. Types of Recursion
Ans. 
Types of recursion include linear, tail, indirect, and mutual recursion.
• Linear recursion involves a function calling itself exactly once.

• Tail recursion is when the recursive call is the last operation in the function.

• Indirect recursion occurs when two or more functions call each other in a cycle.

• Mutual recursion involves two or more functions calling each other in a chain.

• Example: Factorial calculation using linear rec
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Q1. Explain the project ? E-R Diagram of project and Database design
Ans. 
The project is a web-based inventory management system for a retail store.
• Designed E-R Diagram with entities like Product, Supplier, Customer, Order, and Inventory

• Database design includes tables for each entity with appropriate relationships and attributes

• Used SQL to create tables, define constraints, and write queries for data retrieval and manipulation
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Q2. Asked about Foreign key in details ?
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Q3. Gave coding question of moderate level on leetcode.
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Q4. Asked n tower puzzel question
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Q1. Simple simple questions like normal HR round
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