P.S. Global Group interview experience Real time questions & tips from candidates to crack your interview
Fullstack Developer
P.S. Global Group
1 rounds | 1 Coding
problems
Selected Interview preparation journey
Journey
I prepared well for my interview by going through the Coding Ninjas courses, revising the concepts thoroughly, and solving DSA problems on CodeStudio. This consistent practice helped me strengthen both my theoretical knowledge and problem-solving ability.
Preparation
Topics: MERN, DSA
Application process
Where: Coding Ninjas Placement Cell
Eligibility: NA, (Salary range: 6-8 LPA)
Interview rounds
01
Round
Medium
Online Coding Interview
Duration
Interview date8 Feb 2025
Coding problem1
1. Count of Subarrays with Sum Equal to K
Given an array of integers and an integer value K, find the total number of continuous subarrays whose sum equals K.
Example:
Input: arr = [1, 2, 3], K = 3
Output: 2
Explanation: The subarrays are [1, 2] and [3].
Problem approach
- Maintain a running prefix sum while traversing the array.
- Use a HashMap to store how many times a prefix sum has occurred.
- At each step, check if (currentSum - K) exists in the HashMap:
- If yes, it means there are subarrays ending at the current index whose sum is K.
- Increase the count accordingly.
- Update the HashMap with the current prefix sum.
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Skill covered: Programming
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