Twitter Software Developer Interview Questions, Process, and Tips

Leetcode similar coding tests

Q1. How do you test the feasibility of an idea?
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Q2. Explain the process of calling an API
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Round duration - 90 minutes
Round difficulty - Hard

Online coding round , 2-3 questions. Level - med-hard

Q1. 
Fibonacci Number Verification
Identify if the provided integer 'N' is a Fibonacci number.
A number is termed as a Fibonacci number if it appears in the Fibonacci sequence, where each number is the sum of...read more
Ans. Brute Force
The basic idea is to keep generating Fibonacci numbers until we find a number equal to the given number or the generated number becomes greater than the given number. If the generated number is equal to the given number then it means the given number is a Fibonacci number. Otherwise, it is not a Fibonacci number.
 
The steps are as follows:
 
1. Check if ‘N’ is 0 or 1, return true.
2. Create two variables ‘a’...read more
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Q2. 
Break The Board Problem Statement
Your task is to break a board of given dimensions 'L' by 'W' into 'L' * 'W' smaller squares, ensuring the total cost of breaking is minimized.
Input:
The first line con...read more
Ans. Greedy Approach
This problem can be solved using the greedy approach. By greedy, we mean that we simply start cutting the board along every horizontal and vertical line. But this cutting needs to be in a specific manner. Let’s see how we can do this.
 
• Start by making an integer variable minCost and initialize it to 0.
• Now we talked about cutting the board in a specific manner. This specific manner will involve minim...read more
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Round duration - 60 Minutes
Round difficulty - Medium

2 interviewers , coding problem, no compilation.

Q1. 
Minimum Number Of People To Teach
Ninja has started a social networking site called Ninjas Space. The platform consists of ‘N’ users and supports ‘M’ different languages. Users communicate if they know at...read more
Ans. Brute force
To obtain the total number of users Ninja needs to teach, we first need to find the users who cannot communicate with their friends on the social network. Our approach will be to maintain a set and iterate over the array 'FRIENDS', and we will check for every pair of friends whether both of them know a common language using which they can communicate with each other. If both users do not know a common langua...read more
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Round duration - 40 minutes
Round difficulty - Medium

CS fundamentals. Tough round. 40 mins interview. 1 interviewer from USA

Round duration - 40 minutes
Round difficulty - Hard

System Design Problem

Q1. Design a Facebook-like application.
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