AmbitionBox
Interview Questions
- Reviews
- Salaries
- Interview Questions
- About Company
- Benefits
- Jobs
- Office Photos
- Community
Add office photos
Filter interviews by
Coinbase Software Developer Interview Questions and Answers
Coinbase Software Developer Interview Experiences
2 interviews found
Anonymous
1 hour 10 minutes duration, 4 questions, not very difficult but lengthy
(1 Question)
- Q1. Show oops concepts
- Ans.
OOP concepts include encapsulation, inheritance, polymorphism, and abstraction, essential for modular and reusable code.
Encapsulation: Bundling data and methods in a class. Example: A 'Car' class with properties like 'speed' and methods like 'accelerate()'.
Inheritance: Deriving new classes from existing ones. Example: 'ElectricCar' inherits from 'Car', adding features like 'batteryCapacity'.
Polymorphism: Using a single...
Selected
I applied via Naukri.com and was interviewed in Nov 2023. There was 1 interview round.
90mins test. The test had 3 questions. Level of the problems where medium to hard.
Top trending discussions
Interview questions from similar companies
I appeared for an interview before Apr 2021.
(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...
- Q2.
Sort 0 1 2 Problem Statement
Given an integer array
arrof 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).
(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 ...
- 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
- 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
(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...
- 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...
- 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...
Interview Preparation Tips
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)
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)
Skills evaluated in this interview
Ramakant Soni
I applied via Naukri.com and was interviewed in Jun 2021. There were 2 interview rounds.
Interview Preparation Tips
I applied via Campus Placement and was interviewed in Jul 2021. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. What is the polymorphism?
- Ans.
Polymorphism is the ability of an object to take on many forms.
Polymorphism allows objects to be treated as if they are of multiple types.
It enables code to be written that can work with objects of different classes in a uniform way.
Polymorphism can be achieved through method overloading or method overriding.
Example: A shape class can have multiple subclasses like circle, square, triangle, etc. and all can be treated a...
- Q2. What is inheritance?
- Ans.
Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.
Inheritance allows for code reuse and promotes code organization.
The existing class is called the parent or superclass, and the new class is called the child or subclass.
The child class inherits all the properties and methods of the parent class, and can also add new properties and method...
Interview Preparation Tips
I appeared for an interview before Sep 2020.
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Easy
- Q1.
0/1 Knapsack Problem Statement
A thief is planning to rob a store and can carry a maximum weight of 'W' in his knapsack. The store contains 'N' items where the ith item has a weight of 'wi' and a value of...
- Ans.
Yes, the 0/1 Knapsack problem can be solved using dynamic programming with a space complexity of not more than O(W).
Use a 1D array to store the maximum value that can be stolen for each weight capacity from 0 to W.
Iterate through each item and update the array based on whether including the item would increase the total value.
The final value in the array at index W will be the maximum value that can be stolen.
- Q2.
Find the Second Largest Element
Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.
If a second largest element does not exist, return -1.
Example:
Input:
ARR = [2,...
- Ans.
Find the second largest element in an array of integers.
Iterate through the array to find the largest and second largest elements.
Handle cases where all elements are identical.
Return -1 if a second largest element does not exist.
(1 Question)
Round duration - 60 Minutes
Round difficulty - Easy
System Design Round
- Q1. Design a system for Twitter, discussing its architecture, key components, and scalability considerations.
- Ans.
Design a scalable system for Twitter with key components and architecture.
Use microservices architecture for scalability and fault isolation.
Key components include user service, tweet service, timeline service, and notification service.
Use a distributed database like Cassandra for storing tweets and user data.
Implement a message queue like Kafka for handling real-time updates and notifications.
Use a caching layer like ...
Round duration - 30 Minutes
Round difficulty - Easy
It is just a formality
Interview Preparation Tips
Tip 1 : System Design
Tip 2 : Practice questions from leetcode
Tip 3 : Have some projects.
Tip 1 : Mention what you know
Tip 2 : Good previous work to showcase
Skills evaluated in this interview
Chirag Varshney
(4 Questions)
- Q1. Explain Deadlock?
- Ans.
Deadlock is a situation in computing where two or more processes cannot proceed because each is waiting for the other to release resources.
Occurs in multi-threaded environments when processes hold resources and wait for others.
Example: Process A holds Resource 1 and waits for Resource 2, while Process B holds Resource 2 and waits for Resource 1.
Can lead to system inefficiency and unresponsiveness.
Deadlock detection and...
- Q2. Explain Red Black Tree?
- Ans.
A Red-Black Tree is a balanced binary search tree with specific properties to ensure efficient operations.
Each node is colored either red or black.
The root node is always black.
Red nodes cannot have red children (no two reds in a row).
Every path from a node to its descendant leaves must have the same number of black nodes.
This structure ensures O(log n) time complexity for insertion, deletion, and search operations.
Exa...
- Q3. Find local minima in a 1-D array?
- Q4. Find local minima in 2-D array?
- Ans.
Local minima in a 2-D array are elements smaller than their neighbors. We can find them using various algorithms.
A local minimum is defined as an element that is less than its adjacent elements.
For example, in the array [[9, 8, 7], [6, 5, 4], [3, 2, 1]], the element 1 is a local minimum.
To find local minima, iterate through each element and compare it with its neighbors (up, down, left, right).
Consider edge cases where...
Skills evaluated in this interview
Interview Preparation Tips
📌Do your research on the job or company
📌Have a good knowledge about your role
📌Be on time
📌Be confident
📌Greet interviewer with a hand shake nd warm smile
📌Dress better
📌Maintain a good body language
📌Maintain a good eye contact
📌Listen
📌Take care to answer the questions
📌Don't be cocky
📌Focus on good nonverbal communication
📌Use appropriate language
📌Don't forget to bring appropriate materials like resume, pen etc
📌Ask questions.
Selected
I applied via Naukri.com and was interviewed in Apr 2023. There were 2 interview rounds.
(3 Questions)
- Q1. Why should hire you?
- Ans.
I have the technical skills, experience, and passion to excel in this role.
I have a strong background in software development, with experience in multiple programming languages and frameworks.
I am a quick learner and enjoy staying up-to-date with the latest technologies and industry trends.
I am a team player and have experience collaborating with cross-functional teams to deliver high-quality software solutions.
I am pa...
- Q2. Why you fit for this job?
- Ans.
I have the required technical skills and experience to excel in this role.
I have a degree in Computer Science and have worked as a software developer for 5 years.
I am proficient in multiple programming languages including Java, Python, and C++.
I have experience working with databases and have developed several web applications.
I am a quick learner and enjoy working in a team environment.
I am passionate about software d...
- Q3. Tell me about your self?
- Ans.
I am a software developer with experience in Java and Python.
I have a Bachelor's degree in Computer Science.
I have worked on projects involving web development, data analysis, and machine learning.
I am proficient in Java and Python programming languages.
I am familiar with various software development tools and frameworks such as Spring, Django, and Flask.
I am a quick learner and enjoy working in a team environment.
Interview Preparation Tips
- Core Java
- HTML
- CSS
- SQL
I applied via Naukri.com and was interviewed in May 2022. There was 1 interview round.
(1 Question)
- Q1. Java sql html css javascript
Interview Preparation Tips
Coinbase Interview FAQs
Tell us how to improve this page.
Coinbase Interviews By Designations
- Coinbase Customer Support Executive Interview Questions
- Coinbase Software Developer Interview Questions
- Coinbase Senior Software Engineer Interview Questions
- Coinbase Compliance Analyst Interview Questions
- Coinbase Senior Software Engineer 1 Interview Questions
- Coinbase Data Scientist Interview Questions
- Coinbase Software Engineer Interview Questions
- Coinbase Product Manager Interview Questions
- Show more
Interview Questions for Popular Designations
- Software Engineer Interview Questions
- Java Developer Interview Questions
- Web Developer Interview Questions
- Senior Software Developer Interview Questions
- Application Developer Interview Questions
- Salesforce Developer Interview Questions
- Software Development Engineer Interview Questions
- Developer Interview Questions
- Show more
Overall Interview Experience Rating
based on 2 interview experiences
Difficulty level
Duration
Software Developer Interview Questions from Similar Companies
|
Software Engineer
56
salaries
|  ₹26 L/yr - ₹75 L/yr |
|
Compliance Analyst
51
salaries
| ₹4 L/yr - ₹14.4 L/yr |
|
Software Developer
35
salaries
| ₹59.5 L/yr - ₹190.7 L/yr |
|
Senior Software Engineer
29
salaries
| ₹40 L/yr - ₹120 L/yr |
|
Support Analyst
25
salaries
| ₹4.5 L/yr - ₹9.5 L/yr |
Udaan
Swiggy
CARS24
BlackBuck
- Home >
- Interviews >
- Coinbase Interview Questions
