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Junior Interview Preparation roadmap

Land your first developer job: behavioral and technical interviews for juniors, SOLID, TDD and the array and SQL drills interviewers ask first.

What you will learn

  1. 1. Behavioral Interview

    Answer behavioral questions with the STAR method, talk about mistakes honestly and handle offers and negotiation.

  2. 2. Junior Technical Interview

    The OOP, web and database questions juniors get asked, and how to think aloud while you code.

  3. 3. Arrays, Strings & Hashing

    The everyday data structures: arrays, strings, hash tables and sets.

  4. 4. SQL Foundations

    Query relational data with SELECT, filtering, sorting and joins.

  5. 5. Testing EssentialsOptional

    Unit tests with Arrange-Act-Assert, then integration and end-to-end tests.

  6. 6. TDD Fundamentals

    Learn the red-green-refactor cycle, write tests first in small steps and practise it on classic katas.

  7. 7. Linked Lists, Stacks & QueuesOptional

    Linear structures and when to reach for a linked list, a stack or a queue.

  8. 8. Searching & SortingOptional

    Sorting algorithms and binary search, and the trade-offs between them.

  9. 9. Two Pointers & Sliding Window

    Two classic patterns that turn quadratic scans over arrays and strings into linear ones.

  10. 10. TDD in Practice

    Use TDD outside-in with test doubles, fix bugs and refactor safely, tame legacy code and avoid the common pitfalls.

  11. 11. Design PrinciplesOptional

    SOLID, coupling and cohesion, and DRY, KISS and YAGNI.

  12. 12. SOLID in Practice

    Apply the five SOLID principles to real code: spot violations, refactor them and explain the trade-offs in an interview.

Each step unlocks when you answer its questions well enough, and a module you finish counts in every roadmap that shares it.

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