Goldman Sachs Software Engineer Interview Questions, Process, and Tips

Round duration - 40 minutes
Round difficulty - Easy

Timing: 12PM
Due to covid, the interviews happened over a video call on Zoom. They also shared an IDE link where we could write our code and the interview could see it.
The interviewer was very polite and helpful. She dropped hints in between to help me reach the final solution when I was stuck or needed some clarity. She wanted to check how analytically I could solve the problem. She focused more on my approaches towards the problem.
There was also a brief discussion on my resume and projects.

Q1. 
Serialization and Deserialization of an N-ary Tree
Given an N-ary tree where each node has at most 'N' child nodes, the task is to serialize the tree into a sequence of bits and then deserialize it back t...read more
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Round duration - 40 minutes
Round difficulty - Medium

Timing: Mid-afternoon
Due to covid, the interviews happened over a video call on Zoom. They also shared an IDE link where we could write our code and the interview could see it.
The interviewer was very polite and helpful. He dropped hints in between to help me reach the final solution when I was stuck or needed some clarity. He wanted to check how analytically I could solve the problem. He focused more on my approaches towards the problem.
There was also a brief discussion on my resume and projects.

Q1. 
Design a Constant Time Data Structure
Create a data structure that maintains mappings between keys and values, supporting the following operations in constant time:
1. INSERT(key, value): Add or update t...read more
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Round duration - 30 Minutes
Round difficulty - Medium

Timing: Evening
Due to covid, the interviews happened over a video call on Zoom. They also shared an IDE link where we could write our code and the interview could see it.
There was a panel of three people as interviewers in this round.
I was also asked one behaviour questions in this round.

Q1. 
Simplify Directory Path Problem Statement
You are provided with a directory path in Unix-style notation, and your task is to simplify it according to given rules.
In a Unix-style file system:
• A dot (...read more
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Round duration - 60 minutes
Round difficulty - Medium

Technical round with questions on DSA and OS.

Q1. 
LRU Cache Design Problem Statement
Design and implement a data structure for a Least Recently Used (LRU) cache that supports the following operations:
• get(key) - Retrieve the value associated with the...read more
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Q2. 
Maximum of All Subarrays of Size K
Given an array of non-negative integers and an integer K representing the length of a subarray, your task is to determine the maximum elements for each subarray of size ...read more
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Q3. What is virtual memory?
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