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Coinbase Senior Software Engineer 1 Interview Questions and Answers

Updated 26 Jul 2024

Coinbase Senior Software Engineer 1 Interview Experiences

2 interviews found

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Config Builder, where request response structure was given, need to generate multiple combinations from the given request attributes
  • Ans. 

    Use the given request attributes to generate multiple combinations in Config Builder

    • Identify all the attributes in the request response structure

    • Create a list of possible values for each attribute

    • Generate all possible combinations of values from the attributes

  • Answered by AI

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via LinkedIn and was interviewed in Apr 2024. There was 1 interview round.

Round 1 - Coding Test 

The Coding test was very long and there was not sufficient time to complete the interview

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I was interviewed before Apr 2021.

Round 1 - Telephonic Call 

(2 Questions)

Round duration - 45 Minutes
Round difficulty - Medium

It was in the mid day and since I applied for a Frontend role the discussion was majorly around data structure and bit of Javascript.
The interviewer was helping and good listener.

  • Q1. 

    Merge Two Sorted Linked Lists Problem Statement

    You are provided with two sorted linked lists. Your task is to merge them into a single sorted linked list and return the head of the combined linked list.

    ...
  • Ans. 

    Merge two sorted linked lists into a single sorted linked list without using additional space.

    • Create a dummy node to start the merged list

    • Compare the values of the two linked lists and add the smaller value to the merged list

    • Move the pointer of the merged list and the pointer of the smaller value list

    • Continue this process until one of the lists is fully traversed

    • Append the remaining elements of the other list to the me

  • Answered by AI
  • Q2. 

    Sort 0 1 2 Problem Statement

    Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.

    Input:

    The first line contains an integer 'T' representing the n...
  • Ans. 

    Sort an array of 0s, 1s, and 2s in linear time complexity.

    • Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.

    • Swap elements based on the values encountered to sort the array in-place.

    • Time complexity should be O(N) and space complexity should be O(1).

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

It was more of a in depth round on the framework I'm working on and problem solving.

  • Q1. What is the event loop and what is its significance?
  • Ans. 

    The event loop is a mechanism in programming that allows for asynchronous execution of code.

    • The event loop is a key component in JavaScript's runtime environment, responsible for handling asynchronous operations.

    • It continuously checks the call stack for any pending tasks and executes them in a non-blocking manner.

    • The event loop ensures that the program remains responsive by allowing other code to run while waiting for ...

  • Answered by AI
  • Q2. Can you provide examples of output-based questions in JavaScript that utilize browser APIs?
  • Ans. 

    Output-based questions in JavaScript using browser APIs

    • Example 1: Write a script that uses the Geolocation API to display the user's current location on a map

    • Example 2: Create a program that uses the Web Audio API to play a sound when a button is clicked

    • Example 3: Develop a web page that uses the Canvas API to draw a simple animation

  • Answered by AI
  • Q3. How would you design a system to support localization in a mobile app?
  • Ans. 

    Designing a system to support localization in a mobile app

    • Use resource files to store localized strings for different languages

    • Implement a language selection feature for users to choose their preferred language

    • Utilize localization libraries or frameworks to streamline the process

    • Consider cultural differences when localizing content, such as date formats and currency symbols

  • Answered by AI
Round 3 - Face to Face 

(3 Questions)

Round duration - 75 Minutes
Round difficulty - Hard

It was more of a fitment/managerial round.
Didn't had any coding questions, but was asked more on approaches and optimisations.
Discussions on the project you have worked on.

  • Q1. You need to find the fastest 3 horses out of a group, given that you can only race 5 horses at a time. How would you approach this problem?
  • Ans. 

    To find the fastest 3 horses out of a group with 5 horses racing at a time, we can use a tournament style approach.

    • Divide the horses into groups of 5 and race them against each other. This will give you the fastest horse in each group.

    • Take the winners from each group and race them against each other. The top 3 horses in this final race will be the fastest 3 overall.

    • Keep track of the results and compare the timings to d

  • Answered by AI
  • Q2. How do you debug the root cause of lag on a screen?
  • Ans. 

    To debug lag on a screen, analyze code, check for memory leaks, optimize rendering, and use profiling tools.

    • Analyze code to identify any inefficient algorithms or operations causing lag.

    • Check for memory leaks that could be impacting performance.

    • Optimize rendering by reducing the number of draw calls, optimizing shaders, and minimizing overdraw.

    • Use profiling tools like Xcode Instruments or Android Profiler to identify p

  • Answered by AI
  • Q3. Can you explain the architecture of the app you have recently worked on?
  • Ans. 

    The app I recently worked on is a social media platform for sharing photos and connecting with friends.

    • The app follows a client-server architecture, with the client being the mobile app and the server handling data storage and processing.

    • The client side is built using React Native for cross-platform compatibility.

    • The server side is implemented using Node.js with a MongoDB database for storing user data and photos.

    • The a...

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in GurgaonEligibility criteriaNo criteriaCars24 interview preparation:Topics to prepare for the interview - Data Structures Algorithms, Javascript, System DesignTime required to prepare for the interview - 1 MonthInterview preparation tips for other job seekers

Tip 1 : Get your JS fundamentals right (if applying for a Frontend role, https://javascript.info/ is a good start)
Tip 2 : Apart from preparing data structures, practise on the communication skills as well (prepare your introduction, be a good listener and on spot improvisation plays key roles)

Application resume tips for other job seekers

Tip 1 : highlight projects related to the job profile in your resume and mention what was your contribution in them precisely in 1/2 lines.
Tip 2 : Include URLs to applications/projects that you have build and your achievements/blog (if any)

Final outcome of the interviewSelected

Skills evaluated in this interview

Round 1 - Technical 

(2 Questions)

  • Q1. Latest features in iOS
  • Ans. 

    iOS 14 introduced new features like App Library, Widgets, Picture in Picture, and Translate app.

    • App Library organizes apps automatically into categories

    • Widgets can be added to the home screen for quick access to information

    • Picture in Picture allows for video playback while using other apps

    • Translate app offers real-time translation in multiple languages

  • Answered by AI
  • Q2. Concepts of basic topics
Round 2 - Assignment 

Display list of images with unit tests

Interview Preparation Tips

Interview preparation tips for other job seekers - Be clear in basics. Your understanding will be checked.

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Approached by Company and was interviewed in Sep 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. Problems related to Binary Search
  • Q2. Problem statement on BST

Interview Preparation Tips

Interview preparation tips for other job seekers - DSA basics
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Coding Test 

Android basic + DSA and problem solving

Round 3 - Technical 

(1 Question)

  • Q1. Android in depth
  • Ans. 

    Android is a mobile operating system developed by Google, based on the Linux kernel.

    • Android is open-source and allows developers to create applications using Java or Kotlin.

    • Android apps can be distributed through the Google Play Store or other third-party app stores.

    • Android supports a wide range of devices, from smartphones and tablets to smart TVs and wearables.

    • Android provides a rich set of APIs for accessing device ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Good culture, but security of job is a major issue here

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in May 2024. There was 1 interview round.

Round 1 - Coding Test 

HackerRank Test - 2 Medium Questions
1. Given an Array Weights of Chocolates, Find Maximum amount of Chocolate that can be saved after "d" days, if you eat half the weight of one of the chocolates every day.
2. Find Closest String with equal number of vowels and consonants.

Interview Preparation Tips

Topics to prepare for CoinDCX Senior Software Engineer interview:
  • Data Structures
  • Algorithms

I was interviewed before May 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 150 Minutes
Round difficulty - Medium

3 coding questions and 20 mcq's

  • Q1. 

    Maximum Sum of Two Non-Overlapping Subarrays

    Given an integer array ARR and a positive integer K, your task is to determine two non-overlapping subarrays of length K that yield the maximum combined sum.

    ...

  • Ans. 

    The task is to find two non-overlapping subarrays of length K in an array, such that their sum is maximum.

    • Iterate through the array and calculate the sum of each subarray of length K

    • Store the maximum sum obtained from the first subarray

    • Iterate again and calculate the sum of each subarray of length K, excluding the previous subarray

    • Store the maximum sum obtained from the second subarray

    • Return the sum of the two maximum

  • Answered by AI
  • Q2. 

    Distinct Subsequences Problem Statement

    You are given a string 'S' of length 'N' which may include duplicate alphabets. Your goal is to calculate the number of distinct subsequences in the string.

    Exampl...

  • Ans. 

    The task is to find the count of distinct subsequences in a given string.

    • Use dynamic programming to solve the problem.

    • Create a 2D array to store the count of distinct subsequences for each prefix of the string.

    • Initialize the first row of the array with 1, as there is only one subsequence of an empty string.

    • For each character in the string, calculate the count of distinct subsequences by considering two cases: including...

  • Answered by AI
  • Q3. 

    Array Intersection Problem Statement

    Given two integer arrays/ lists ARR1 and ARR2 of sizes N and M respectively, you are required to determine their intersection. An intersection is defined as the set of...

  • Ans. 

    The task is to find the intersection of two integer arrays/lists.

    • Read the number of test cases

    • For each test case, read the size and elements of the first array/list

    • Read the size and elements of the second array/list

    • Find the intersection of the two arrays/lists

    • Print the intersection elements in the order they appear in the first array/list

  • Answered by AI
Round 2 - Video Call 

(3 Questions)

Round duration - 120 Minutes
Round difficulty - Medium

Online video call based round, Timing was 10-11 AM
Interview started with basic greetings, post that i explained by projects in brief and then we jumped right into dsa questoins.

  • Q1. 

    Number of Islands Problem Statement

    You are given a non-empty grid that consists of only 0s and 1s. Your task is to determine the number of islands in this grid.

    An island is defined as a group of 1s (re...

  • Ans. 

    The task is to find the number of islands in a grid consisting of 0s and 1s.

    • An island is a group of 1s connected horizontally, vertically, or diagonally

    • The grid is surrounded by 0s on all four edges

    • Use a depth-first search (DFS) or breadth-first search (BFS) algorithm to traverse the grid and count the number of islands

    • Initialize a visited array to keep track of visited cells

    • For each unvisited cell with a value of 1, p...

  • Answered by AI
  • Q2. 

    Arrangement Problem Statement

    Determine the number of permutations of list A = [1, 2, ..., N] such that for every index i, either A[i] is divisible by i or i is divisible by A[i].

    Input:

    The input start...
  • Ans. 

    The goal is to find the number of permutations of a list satisfying certain conditions.

    • Iterate through all permutations of the list

    • Check if each permutation satisfies the given conditions

    • Count the number of permutations that satisfy the conditions

    • Return the count for each test case

  • Answered by AI
  • Q3. 

    Idempotent Matrix Verification

    Determine if a given N * N matrix is an idempotent matrix. A matrix is considered idempotent if it satisfies the following condition:

    M * M = M

    Input:

    The first line cont...
  • Ans. 

    An idempotent matrix is a square matrix that remains unchanged when multiplied by itself.

    • Check if the given matrix satisfies the property M*M = M

    • Iterate through each element of the matrix and perform the matrix multiplication

    • Compare the result with the original matrix

    • If they are equal, return true; otherwise, return false

  • Answered by AI
Round 3 - Video Call 

(1 Question)

Round duration - 120 Minutes
Round difficulty - Easy

This was EM round, started with me explaining my projects in deep and facing some counter questions on that, proceeded to os, dbms basic questions and some low level designing and lastly a puzzle to end interview.

  • Q1. Can you design an attendance management system?
  • Ans. 

    Design attendance management system

    • Create a database to store employee information

    • Implement a user interface for employees to mark their attendance

    • Develop a system to track and record attendance data

    • Generate reports and analytics based on attendance data

  • Answered by AI
Round 4 - HR 

Round duration - 20 Minutes
Round difficulty - Easy

This was formality round, HR came and explained what meesho does and told my joining dates and compensation details.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNo criteriaMeesho interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, OOPS, DBMS, Dynamic Programming, Low level designTime required to prepare for the interview - 5 MonthsInterview preparation tips for other job seekers

Tip 1 : Do medium level queustions
Tip 2 : Learn basic system design for startup interviews.

Application resume tips for other job seekers

Tip 1 : Put things on your resume that you know by your heart, otherwise will have a lot of difficulty in the HM round.
Tip 2 : Do not mention co-curricular activities on your resume.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Approached by Company and was interviewed in Jan 2022. There were 4 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Fundamentals and Basics of android, projects you are worked on.
Round 2 - Assignment 

It was sort of pair programming where you will be told to implement some feature. Here they check your coding style, your approach and the architecture you follow.

Round 3 - Technical 

(1 Question)

  • Q1. Advanced android questions were asked and some scenario based questions.
Round 4 - One-on-one 

(1 Question)

  • Q1. It was managerial round, most discussion were on my projects and past experience.

Interview Preparation Tips

Interview preparation tips for other job seekers - Brushing up fundamentals and basics, aware of latest tech stack would help.
Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Implement an immutable class.
  • Ans. 

    An immutable class is a class whose instances cannot be modified after creation.

    • Use final keyword for class declaration to prevent inheritance

    • Make all fields private and final to prevent modification

    • Do not provide setter methods, only getter methods should be used

  • Answered by AI
  • Q2. Implement a springboot service that intercepts http requests.
  • Ans. 

    Implement a Springboot service to intercept HTTP requests.

    • Create a Springboot application with necessary dependencies.

    • Implement a custom interceptor by extending HandlerInterceptorAdapter.

    • Override preHandle and postHandle methods to intercept requests and responses.

    • Register the interceptor in the WebMvcConfigurerAdapter configuration class.

  • Answered by AI

Skills evaluated in this interview

Coinbase Interview FAQs

How many rounds are there in Coinbase Senior Software Engineer 1 interview?
Coinbase interview process usually has 1 rounds. The most common rounds in the Coinbase interview process are Coding Test and Technical.

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Coinbase Senior Software Engineer 1 Interview Process

based on 2 interviews

Interview experience

3
  
Average
View more

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