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Coinbase Software Developer Intern Interview Questions and Answers
1 interview found
Anonymous
I applied via Walk-in and was interviewed before Oct 2022.
2 Interview Rounds
Coding Test Round
1 question, 45 min design the coinbase wallet and perform given tasks.
One-on-one Round (1 Question)
- Q1. Desgin coinbase and upload on facebook. then get 1 million downloadds on it Add Answer
Interview Preparation Tips
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Interview questions from similar companies
I applied via Campus Placement and was interviewed in Jan 2024.
4 Interview Rounds
Coding Test Round
Easy to medium level of leet code
Technical Round (1 Question)
- Q1. 1. Fibonacci series with recursion and without recursion
2. String Palindrome
3. Count all repeated numbers from the array View Answers (3)
Technical Round (1 Question)
- Q1. 1.Given an array(0-based indexing), you have to find the max sum of i*A[i] where A[i] is the element at index i in the array. The only operation allowed is to ...read more View Answers (1)
HR Round (1 Question)
- Q1. 1.Oops concepts
2.Oops code
2.About Java Spring
3. Array stack questions
4.Project discussion Add Answer
Interview Preparation Tips
Skills evaluated in this interview
Selected
I was interviewed before Aug 2023.
3 Interview Rounds
Coding Test Round
3 question of basic and 3 mcq
Coding Test Round
Strings,Sort 0 1 2,invert binary tree
One-on-one Round (2 Questions)
- Q1. Project Basics and Technical skills Add Answer
- Q2. Your Daily routine View Answers (1)
1 Interview Round
Technical Round (1 Question)
- Q1. It was based on dynamic programming Add Answer
Interview Preparation Tips
I applied via campus placement at Indian School of Mines (ISM), Dhanbad and was interviewed before Nov 2023.
2 Interview Rounds
Coding Test Round
2 questions on Hackerearth leetcode medium to hard level
Technical Round (1 Question)
- Q1. 2 Technical Interview
First round they asked 2 easy questions one of map and other of stack
second round they asked LRU Cache and Kadane's algorithm Add Answer
Interview Preparation Tips
CodingNinjas
I was interviewed in May 2021.
1 Interview Round
Coding Test Round (3 Questions)
Round duration - 90 Minutes
Round difficulty - Hard
Test Description/Instruction as Mentioned on the portal and mail :
1) The test will consist of 3 algorithmic problems.
2) The test time is 1.5 hours in which you will need to solve the 3 problems. The test link will be active from 10:00 AM onwards.
3) Please do not change the tabs since all the actions will be recorded and logged.
- Q1. Flood Fill Algorithm Ninja has found his new passion for photography. He has clicked some really good photos but in one of his images, he doesn’t like the color...read more View Answers (4)
- Q2. Kruskal’s Minimum Spanning Tree Algorithm You have been given a connected undirected weighted graph. Your task is to find the weight of the minimum spanning tre...read more View Answers (3)
- Q3. Merge Sort Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm. E...read more View Answers (3)
Interview Preparation Tips
Tip 1 : Practice Atleast 300 Questions on leetcode (150 easy, 100 medium and 50 hard )
Tip 2 : Make atleast one big project which includes (DB, backend and frontend). Because in Hiring Manager round we have to discuss our resume for about 45mins to 1 Hr so having 1 or 2 big projects on the resume is always good to have otherwise HM will go towards core subjects Like OOP/OS/Networks which are often tricky.
Tip 3 : Think out of the box while solving a Question think of all the variants in which this questions can be asked. Let's take an example of simple question like two sum here we have to find a pair in an array whose sum is equal to given value. Now what if Interviewer asked to find three numbers instead of 2 or maybe find k numbers whose sum is equal to a given number. So it is always good to think out of the box and generalise the solution.
Tip 4 : Always try to solve each question in different ways. You should know both the bruteforce solution and the optimal one.
Tip 5 : When you solve a Question try to learn as much possible from a single Question for eg if you try to solve a Tree question then it is good to know both the iterative and recursive solution as sometimes Interviewer may introduce some constraints that due to huge test case recursive solution is not possible.
Tip 6 : 3-4 days before the interview start preparing using interviewbit as it contains all the important questions topic wise. I usually solve Interviewbit before the interview. No doubt Leetcode is good in terms of UI, Test cases and Easy to use but Interviewbit is more organised. I myself have done all the Interviewbit Questions multiple times.
Tip 1 : Try to add Experience at the top with detailed explanation of work done by you
Tip 2 : If No Experience: try to add more and more personal projects with the skills required in JD
Tip 3 : If No projects and Experience: Try to add Coding profiles, Achievements (Hackathons and Coding Competitions )
Skills evaluated in this interview
I was interviewed in Feb 2021.
2 Interview Rounds
Assignment Round (1 Question)
Round duration - 24 hours
Round difficulty - Medium
- Q1. Assignment There is an event and different types of prizes available at the event. How to send them to the end user or what will the required fields and links. ...read more View Answers (1)
Video Call Round (3 Questions)
Round duration - 120 Minutes
Round difficulty - Medium
It was a Data Structures and Algorithm Round and Discussion on My assignment round to check my Problem Solving Skills.
And the Interviewer was very friendly to me. I first introduced myself to the interviewer and what did I have done in past as a Software Engineer and Why I want to work in Grofers.
- Q1. Top View Of The Tree You are given a Binary Tree of integers. You are supposed to return the top view of the given binary tree. The Top view of the binary tree ...read more View Answers (3)
- Q2. Maximum Possible Time Given an array/list ‘ARR’ having 4 integer digits only. The task is to return the maximum 24 hour time that can be formed using the digits...read more View Answers (1)
- Q3. Technical Questions Then we have a small discussion on my projects and Past internship experience. He asks some questions related to my projects and what diffic...read more Add Answer
Interview Preparation Tips
Tip 1 : Practise Data Structures and Algorithms as much as you can on daily basis. Don't Fix numbers in your head, but practise as much as you can from all topics on daily basis.
Tip 2 : Give Programming Contests on a Daily basis. As it helps you to think of any particular problem in the fixed time frame.
Tip 3 : For Mastering DP, Learn From Aditya Verma Youtube Playlist and apply around 100 questions for solving any DP problem.
Tip 4 : Also Learn Computer Science theory subject once a week so that you will have a deep understanding of the particular subject since many interviews grind on CS theory subjects like OS, DBMS and Networks
Tip 5 : Make at least 2-3 Projects in any technology you like maybe Web Development or Android Development. It shows that you have some experience in Development and the company don't need to waste time on you for teaching frameworks.
Tip 6 : If you have time learn some System Design and learn how to design any system from end to end. Especially learn about designing a database of any application. In many interviews, the interviewer asks to design an application from end to end. So if you have some practice, then you can easily clear this type of rounds.
Tip 1 : Always attached your Project links in your resume. As it seems your project is genuine and you are confident in showing your projects
Tip 2 : Don't add unnecessary things in your resume which are not related to the job, like your 10th class winning tournament certificate or managing a college society. These things didn't create any impact on your profile and takes an unnecessary space in your resume.
Tip 3 : Always make a 1-page resume. If you are making more than 1 page then it means you have added a lot of unnecessary information which are not related to the job profile.
Tip 4 : Always show your Project and Past experience on top, just after your basic info and education. Since these are the things which should be on top to showcast the skills.
Skills evaluated in this interview
Selected
I applied via campus placement at Kalinga Institute of Industrial Technology, Khurda and was interviewed in Sep 2023.
1 Interview Round
Coding Test Round
3 Questions were asked out of which if you did 2 you were shortlisted for next round. Questions were mostly from topics like array, string and greedy
Interview Preparation Tips
I applied via LinkedIn and was interviewed in Dec 2023.
1 Interview Round
Technical Round (1 Question)
- Q1. System design, coding and debugging Add Answer
I was interviewed in Sep 2020.
3 Interview Rounds
Coding Test Round (3 Questions)
Round duration - 180 Minutes
Round difficulty - Easy
There were 3 coding questions.
1 easy
1 medium
1 hard
- Q1. Flip Bit to Win Ninjas are often known for their stealth execution and accuracy to get the job done right. While honing their art of moving through dense forest...read more View Answers (2)
- Q2. PostFix To Prefix Ninja has been given a Postfix expression and he needs your help in converting it to Prefix expression. Postfix expression is an expression wh...read more View Answers (1)
- Q3. Saving Money Ninja likes to travel a lot, but at the same time, he wants to save as much money as possible. There are ‘N’ Stations connected by ‘M’ Trains. Each...read more View Answers (3)
Face to Face Round (2 Questions)
Round duration - 45 Minutes
Round difficulty - Medium
2 coding questions were asked
2 medium questions
- Q1. Dice Throws You are given D dice, each having F faces numbered 1 to F, both inclusive. The task is to find the possible number of ways to roll the dice together...read more View Answers (4)
- Q2. Safe Nodes In The Graph Ninja has been given a matrix/list 'EDGES' denoting 'E' edges of a directed graph having ‘N’ nodes. Ninja starts walking...read more View Answers (2)
Face to Face Round (1 Question)
Round duration - 60 Minutes
Round difficulty - Easy
1 coding question was asked and resume related and 1 Javascript related question.
- Q1. Network Delay Time You have been given a network of ‘N’ nodes from 1 to ‘N’ and ‘M’ edges. For each edge, you are given three values (ui, vi, wi) where “ui” and...read more View Answers (1)
Interview Preparation Tips
Tip 1 : Practice Leetcode medium level questions properly
Tip 2 : Low-level and high-level system design is very important
Tip 3 : Always make notes of core subjects like DBMS, OS, CN beforehand to be able to revise before interviews
Tip 1 : Write the technology about which you know in detail and can discuss pros and cons of using it.
Tip 2 : Prepare your resume well and add 2 good projects for project discussion with good readme file on github.
Skills evaluated in this interview
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