Paytm Android Developer Interview Questions, Process, and Tips

Q1. DSA: Put zeroes to end in an array
Ans. 
Move all zeroes to the end of an array of strings.
• Iterate through the array and keep track of the count of zeroes encountered.

• Swap non-zero elements with the first zero encountered to move zeroes to the end.
Answered by AI
Add your answer
Q2. What is context? Type of context in android, what are the differences
Ans. 
Context in Android refers to the current state of the application. There are different types of context in Android with varying scopes and lifecycles.
• Context is an abstract class in Android that allows access to application-specific resources and classes.

• There are three main types of context in Android: Application Context, Activity Context, and Service Context.

• Application Context is tied to the lifecycle of the applic...read more
Answered by AI
Add your answer

Q1. Data structures and kotlin basics to advance
Add your answer

Round duration - 45 Minutes
Round difficulty - Easy

Q1. 
BST Iterator Problem Statement
You are tasked with creating a class named BSTIterator that acts as an iterator for the inorder traversal of a binary search tree. Implement the following functions:
1. BST...read more
Add your answer
Q2. 
Integer to Roman Conversion
Given an integer N, convert it to its corresponding Roman numeral representation. Roman numerals comprise seven symbols: I, V, X, L, C, D, and M.
Example:
Input:
N = 2
Outp...read more
Add your answer

Round duration - 45 Minutes
Round difficulty - Medium

Q1. 
Cube Sum Pairs Problem Statement
Given a positive integer N, find the number of ways to express N as a sum of cubes of two integers, A and B, such that:
N = A^3 + B^3
Ensure you adhere to the following c...read more
Add your answer
Q2. 
Colorful Knapsack Problem
You are given a set of 'N' stones, each with a specific weight and color. The goal is to fill a knapsack with exactly 'M' stones, choosing one stone of each color, so that the to...read more
Add your answer

Round duration - 15 Minutes
Round difficulty - Easy