Data Structures
Build confidence with core Data Structures concepts, from arrays and linked lists to stacks, queues, trees, and hash tables. These quizzes focus on operations, time/space complexity, and choosing the right structure for a problem.
Quizzes
Tree traversals and heap properties
Strengthen your understanding of tree traversals and heap properties with a focused set of Data Structures questions. You’ll work through traversal orders, heap invariants, and typical edge cases found in interviews and coursework. Pick your preferred question count and difficulty, then learn from each explanation as you go.
Choose the right data structure
Picking the right data structure can turn a slow solution into a clean, efficient one. In this quiz, you’ll match real programming scenarios to the best structure—arrays, lists, stacks, queues, hash maps, trees, heaps, and graphs. Expect a mixed difficulty set that tests both fundamentals and practical trade-offs.
Big-O for core operations
Test your intuition for Big-O time complexity across the core operations you use every day. You’ll compare common data structures and spot which operations are constant, logarithmic, linear, or worse. Pick a question count and a difficulty level to match your study goal, then learn from quick, focused explanations.
What you'll find here
- Curated quizzes focused on Data Structures
- Difficulty spread from easy to hard
- Randomized questions with instant feedback
- Quizzes you can replay and compare on the leaderboard
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Category FAQ
How many quizzes are available?
There are 3 quizzes with 339 questions total.
Do these Data Structures quizzes have a timer?
No. Each question is untimed so you can work carefully through operations and complexity.
How are the questions formatted?
Every question is multiple-choice with 4 options.
What topics are covered in this category?
You’ll see core structures like arrays, linked lists, stacks, queues, trees, heaps, and hash tables, along with Big-O and common operations.
Are the quizzes suitable for different skill levels?
Yes. The set includes a mix of foundational questions and more applied ones, with varying difficulty and length.
More to explore
What you’ll practice
These Data Structures quizzes help you review how common structures work, what operations they support, and how to analyze performance with Big-O.
You’ll practice recognizing when to use arrays, linked lists, stacks, queues, trees, heaps, and hash tables, plus typical pitfalls like collisions, balancing, and pointer/reference handling.
How the quizzes work
Each question has 4 options and there’s no timer, so you can think through edge cases and complexity trade-offs.
Difficulty and length vary across the set: some quizzes focus on fundamentals and definitions, while others mix in implementation details and scenario-based questions.
Useful context and quick tips
Many modern systems rely on data structures under the hood—databases use B-trees or LSM trees for indexing, language runtimes use hash tables for dictionaries/maps, and priority queues power scheduling and shortest-path algorithms.
- Compare time complexity for search/insert/delete across structures
- Identify which structure fits a constraint (ordering, fast lookup, memory)
- Spot traversal patterns (BFS/DFS) and their typical uses
- Recognize hashing concepts: load factor, collisions, and probing/chaining
- Understand tree properties: height, balance, and heap invariants