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Data Structures
Arrays, linked lists, stacks, queues, trees, heaps, graphs, hashing, sorting and complexity.
10 focused questions • instant score • challenge a friend
Data Structures — 10 question drill
Questions are loaded from the public question bank; AI fills the gap when needed.
1/10Topic drill
Mock tests
After this focused drill, continue to the exam-level public quiz and free-marked mock practice.
Start full exam quiz →5-day study plan
Use the plan below as a compact revision loop. Adjust the time to your own preparation schedule.
Free learning route
Read the topic checklist, attempt the drill, inspect your mistakes, then revisit the official/source-linked resources from the exam hub.
1
Learn the core model or definition.
2
Practice common question patterns.
3
Re-test after review.
QUALITY LEARNING LAYER
Data Structures — concept-first revision
Understand the concept, check the trap, then return to the live focused quiz above.
What this topic covers
- Arrays and linked lists: compare access, insertion and deletion trade-offs.
- Stacks and queues: LIFO versus FIFO and the common operations they support.
- Trees and heaps: understand traversal, ordering and priority-queue use cases.
- Graphs: BFS/DFS, adjacency structures and when each traversal is useful.
- Hashing and complexity: connect data structures to expected time and space costs.
Common exam traps
- Using a queue for depth-first traversal.
- Memorizing complexity without knowing the operation being analyzed.
- Confusing a binary tree with a binary search tree.
- Ignoring worst-case behaviour of an operation.
How to study it on ExamCracker
- Read the core concepts and examples.
- Attempt the focused public practice on the related exam hub.
- Review every incorrect answer instead of only checking the score.
- Return to the topic before moving to a full-length mock.
Quick check
Quick check: Which data structure is commonly used to implement a breadth-first search traversal?
- A. Stack
- B. Queue
- C. Heap
- D. Hash table
Answer: Queue
Why: BFS explores a graph level by level, so a FIFO queue is the standard traversal structure.
Why: BFS explores a graph level by level, so a FIFO queue is the standard traversal structure.
Why this page exists
This is a focused learning page, not a keyword-only article. It connects an exam concept to practice, related resources and the broader ExamCracker preparation flow.