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Rehan F.
Shrutika S.
Kshitij M.Think you know your DSA basics? This is where you find out.
DSA Challenge 1 puts 40 fundamentals-level questions in front of you and gives you 45 minutes to work through them. The topics span arrays, linked lists, trees, graphs, sorting, searching, and Big-O analysis — the concepts that surface in every placement screen and first-round technical interview. Every answer comes with an instant explanation, so you leave with a precise read on where your fundamentals stand.
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DSA Challenge 1 is a free, timed multiple-choice competition on Abekus that tests your Data Structures and Algorithms fundamentals across 40 questions in 45 minutes. It is built for anyone who has worked through the core concepts — arrays, trees, sorting, complexity — and wants a ranked, pressure-tested read on how well those concepts have actually landed. A live leaderboard runs throughout, and every answer is followed by an instant explanation that pinpoints exactly where your understanding is solid and where it has gaps.
Placement screens, aptitude rounds, and initial technical interviews in India routinely open with an MCQ round that covers these same fundamentals at speed. DSA Challenge 1 replicates that format: a fixed time window, equal weight on every question, and no second chance once you submit. Entering this challenge before your first interview is the difference between discovering your weak spots in a low-stakes environment and discovering them in a room where it counts.
DSA Challenge 1 is set at the fundamentals level. You do not need to have solved hard LeetCode problems or studied graph algorithms in depth — but you should be past the very beginning. A solid working familiarity with arrays, linked lists, sorting, and Big-O notation is the right entry point. If you are still in the middle of your first DSA course, consider completing the DSA: Data Structures Fundamentals course first, then entering the challenge as a checkpoint.
The challenge is well-suited to:
The challenge covers the standard fundamentals curriculum that placement and interview screeners draw from. Topics are distributed across the following areas:
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25020050Questions test recognition, reasoning, and trade-off analysis — not code writing. You will not be asked to implement an algorithm. You will be asked to identify the correct data structure for a described use case, state the time complexity of a named operation, trace through a small example to find the output, or choose between two approaches based on their complexity or space profile. The questions at this difficulty level do not assume knowledge of advanced topics such as dynamic programming, segment trees, minimum spanning trees, or network flow algorithms — a solid grounding in the fundamentals covered in a standard first or second semester CS curriculum is sufficient. This is exactly the type of reasoning that aptitude MCQ rounds and initial technical screens evaluate.
Every question carries equal weight. Your final score is the count of correct answers out of 40. A live leaderboard updates in real time as participants submit their answers during the challenge window, so you can track your position relative to the field while the competition is open. When the challenge closes, the leaderboard freezes. After close, each participant can view their own final rank and score from the results page; the full leaderboard ranking is not shown publicly after close — only your own position is visible. If two participants finish with the same score, the one who completed the challenge in less time ranks higher. This tiebreaker incentivises not just getting answers right but getting them right quickly — the same dynamic that plays out in timed placement rounds.
Instant explanations appear immediately after each answer, so you receive feedback at the point of decision rather than at the end. This means you leave the challenge with a clear per-topic picture regardless of your final rank.
General quiz apps like Sporcle or Quizizz let you test yourself at your own pace with no penalty for slow answers or wrong guesses. DSA Challenge 1 runs on a fixed clock, scores you against a live leaderboard, and follows every question with a curated explanation — making it closer to an interview simulation than a casual study quiz.
Compared to LeetCode or HackerRank, which test hands-on algorithm implementation and code execution, this challenge tests the conceptual MCQ recall used in the screening rounds that come before the coding stage. Most placement drives in India open with exactly this format — multiple-choice aptitude and DSA questions under time pressure — and this challenge gives you a realistic rehearsal of that experience.
If you want to improve your score before entering, the DSA: Data Structures Fundamentals course on Abekus covers the same conceptual ground this challenge tests — data structures, their operations, and the reasoning patterns that timed MCQs demand. Working through the course before entering sharpens the instincts that separate fast, confident answers from slow uncertain ones.
For deeper coverage of sorting algorithms, recursion, and complexity analysis, the DSA — Algorithms & Core Patterns course extends the same foundation into the topics this challenge probes most heavily in its algorithm questions.
Once the challenge closes, your final rank and score are recorded on your Abekus profile. You can review your rank and revisit the per-question explanations from the competition results page. DSA Challenge 1 does not award credits, gems, or a completion certificate — the output is a leaderboard position and a precise per-question breakdown showing which topic areas were strong and which explanations are worth spending more time on before your next interview or assessment. Each explanation names the concept being tested, explains why the correct answer is right, and briefly notes why the most common wrong answers are wrong. Revisiting the explanations for questions you got wrong is the fastest way to close the specific gaps this challenge identifies.
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