Developer Interview Prep

Developer interview questions

Use these questions to practice for backend, frontend and full‑stack roles.

Question sets

Basics (0–2 years)

Explain the difference between a class and an object.
What is a hash map and when would you use it?
Explain REST and the main HTTP methods used in APIs.
What is the difference between an array and a linked list?
How does a database index improve query performance?

Intermediate (2–5 years)

Describe how you would design a rate limiting feature for an API.
What is the difference between optimistic and pessimistic locking?
How do you handle pagination efficiently at the database level?
Explain the CAP theorem with a real‑world example.
How do you approach code reviews to maintain quality?

Advanced / System design

Design a URL shortener service. Which components would you use?
How would you design a notification system for mobile and web clients?
Explain horizontal vs vertical scaling with trade‑offs.
How do you design logging and monitoring for a distributed system?
How would you refactor a legacy monolith towards microservices?

Sample question paper

Download a free sample question paper for Developer interviews.

Download Developer sample PDF

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