Interview Preparation

Ace Your Next Interview

Practice with 250+ interview questions, mock interviews, and expert guides

250+
Interview Questions
50+
Mock Interviews
15+
Study Guides
10K+
Students Helped

Mock Interviews

⛓️

Blockchain Developer - Technical Round

45 min15 questions
Medium
Smart Contracts
Solidity
Web3
💻

Full Stack Developer - Coding Interview

60 min20 questions
Hard
Algorithms
Data Structures
System Design
👥

Behavioral Interview Practice

30 min10 questions
Easy
Leadership
Teamwork
Problem Solving

Study Guides

Complete Blockchain Interview Guide

4.9

Everything you need to ace blockchain interviews

12 topics
150 questions
8 hours
2500 students
All Levels

System Design Masterclass

4.8

Learn to design scalable distributed systems

8 topics
50 questions
6 hours
1800 students
Advanced

Coding Interview Bootcamp

4.9

Master algorithms and data structures

15 topics
200 questions
12 hours
3200 students
Intermediate

Interview Questions

Medium
blockchain
Very High Frequency

Explain how a blockchain achieves consensus and what are the different consensus mechanisms?

Asked by: Coinbase, Binance, ConsenSys
Hard
blockchain
High Frequency

How would you prevent reentrancy attacks in smart contracts?

Asked by: OpenZeppelin, Chainlink, Uniswap
Medium
algorithms
Very High Frequency

Implement a function to reverse a linked list

Asked by: Google, Amazon, Microsoft
Hard
system-design
Medium Frequency

Design a decentralized job marketplace like A3Hero

Asked by: A3Hero, Gitcoin, Braintrust
Easy
behavioral
Very High Frequency

Tell me about a time when you had to work with a difficult team member

Asked by: All Companies