Intermediate~2h
Binary Search in Data Structures & AlgorithmsInterview Readiness Check
Search space reduction — not just sorted arrays but any problem with a monotonic predicate.
sortedsearch spacerotated arrayfind peakbinary answerlo hi mid
Learning path
Try a sample question
A sorted array of 10M product prices. Find if ₹499 exists. Binary search is O(log n) ≈ 23 comparisons vs linear scan O(n) = 10M comparisons. What property of the input enables binary search?
A.The array has no duplicates
B.The target value is an integer
C.The array fits in memory
D.The array is sorted — at each step you can eliminate half the remaining search space because you know all elements left of mid are smaller and all right are larger
Sign up free to take the full check and see the answer with an explanation.
What this module tests
- Conceptual understanding of binary search fundamentals
- Trade-offs and design decisions in real system scenarios
- sorted and search space — applied knowledge
- Interview-style reasoning and explanation quality
Free to start
Take the Binary Search check →
10 questions · Dimension scoring · AI coach feedback · Shareable result
Test your knowledge — free →No credit card · Takes 10–15 min
Frequently asked questions
- What does the Binary Search check test?
- The check covers search space reduction — not just sorted arrays but any problem with a monotonic predicate. Questions span beginner to advanced difficulty and test both conceptual understanding and practical trade-off reasoning.
- What keywords should I know for Binary Search?
- Key concepts include: sorted, search space, rotated array, find peak, binary answer, lo hi mid. These frequently appear in data structures & algorithms interviews at product and infrastructure companies.
- How many questions are in the check?
- Each check has 10 questions — a mix of MCQ and short-answer. You get scored by dimension (e.g., scalability, consistency) so you know exactly where to focus.
- How long does it take to study Binary Search?
- Most engineers spend around 2 hours on this module. The check itself takes about 10–15 minutes. You can retake it up to 3 times per day.
- What prerequisite knowledge do I need before Binary Search?
- Binary Search builds on Arrays & Hashing. Complete those first for the best results.
- Is sorted, search space, rotated array covered?
- Yes. The Binary Search module covers sorted, search space, rotated array among other key concepts. The check includes questions that reflect real data structures & algorithms interview patterns.