Coinbase interview experience Real time questions & tips from candidates to crack your interview

# SDE - 1

Coinbase
2 rounds | 4 Coding problems

## Interview preparation journey

Journey
I was admitted to DTU in the computer science stream. My seniors advised me to practice DSA from the start of my B.Tech, but I did not take their advice seriously. I regretted not following their advice, and in my third year, I started coding and had to increase my practice hours because I started late.
Application story
I applied for the position through the campus drive. After applying, I practised hard for it, and the hard work finally paid off.
Why selected/rejected for the role?
I think I was on point with my coding solutions to the questions asked in the interviews. I could not provide the optimal solutions and was giving correct explanations to some theory questions asked.
Preparation
Duration: 6 months
Topics: Data Structures, Pointers, OOPS, System Design, Algorithms, Dynamic Programming
Tip

Tip 1: Even if you are stuck on a problem, give it a try. The interviewer will help you.

Tip 2: Prepare Data Structures and Algorithms well. They mainly check your problem-solving ability to find solutions for real-world problems.

Tip 3: Be confident and don't be nervous. Maintain at least two projects on your resume.

Application process
Where: Campus
Eligibility: Above 7 CGPA
Resume tip

Tip 1: Mention at least two projects.

Tip 2: Highlight the skills in which you excel.

Tip 3: Ensure your resume is not too long or too short.

## Interview rounds

01
Round
Easy
Video Call
Duration60 minutes
Interview date8 Dec 2022
Coding problem2

Hard
25m average time
75% success
0/120

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### 2. Cycle Detection in a Singly Linked List

Moderate
15m average time
80% success
0/80

#### A cycle occurs when a node's next points back to a previous node in the list.

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02
Round
Medium
Video Call
Duration60 minutes
Interview date8 Dec 2022
Coding problem2

### 1. Occurrence Of Each Word

Easy
10m average time
90% success
0/40

#### You are given a string S of words. Your task is to count the occurrence of each word present in the string S. A ...

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Problem approach

Linear search solution was not working there as they are expecting less than O(n) complexity, so I solved this using binary search by finding the first and the last occurrence of element and subtracting them which will give the required answer.

### 2. Maximum of All Subarrays of Size K

Easy
15m average time
85% success
0/40

#### You are given an array “A” of N integers. Your task is to find the maximum element in all K sized contiguous subarrays from left to right.

##### For Example:
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Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

What is the result of 4 % 2?

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