What data structures must I know for coding interviews?

Master these 8 data structures: arrays, hash maps, linked lists, stacks, queues, trees (binary/BST), graphs, and heaps. According to LeetCode analysis, hash maps and arrays appear in 70%+ of coding problems. Also understand trade-offs between them for different use cases.

How do I improve my algorithm solving speed?

Focus on pattern recognition over memorization. There are approximately 15-20 algorithm patterns that cover 90% of interview problems. Practice identifying patterns in the first 2 minutes of reading a problem. Use AissenceAI real-time hints to build intuition during practice.

What is the most tested algorithm in coding interviews?

Binary search and its variations are the most frequently tested, appearing in approximately 25% of coding interviews. BFS/DFS (20%), two pointers (18%), dynamic programming (15%), and sliding window (12%) round out the top 5.

Blockchain & Web3 Interview Questions for 2026

Blockchain and Web3 Interview Questions 2026

Web3 and blockchain engineering roles require deep understanding of distributed ledger technology, smart contract development, and crypto-economic design. Despite market fluctuations, blockchain developer demand remains strong with 30% year-over-year growth in job postings.

Blockchain interviews test three layers: protocol (consensus mechanisms, networking, cryptography), application (smart contracts, DeFi, NFTs), and infrastructure (node operation, RPC providers, indexing services).

Core Topics

Solidity — Smart contract development, gas optimization, security patterns
Consensus — Proof of Stake (Ethereum), BFT variants, finality guarantees
Security — Reentrancy attacks, flash loans, front-running, formal verification
DeFi — AMM design, lending protocols, oracle integration
L2 Solutions — Rollups (Optimistic, ZK), sidechains, data availability

For general technical prep: system design. Practice: AissenceAI.

Blockchain & Web3 Interview Questions for 2026

Blockchain and Web3 Interview Questions 2026

Core Topics

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