Computer ScienceData Structures & Algorithmsmixed

Data Structures & Algorithms Quiz

Practice quiz on Data Structures & Algorithms (Computer Science). 10 exam-style questions with explanations.

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About This Quiz

Practice quiz on Data Structures & Algorithms (Computer Science). 10 exam-style questions with explanations. Data Structures & Algorithms Quiz is a free, 10-minute, 10-mark practice quiz on AajExam rated at mixed difficulty, designed to help candidates preparing for SSC, UPSC, Banking, Railway and State PSC government competitive exams sharpen their command of Data Structures & Algorithms (Computer Science). Every question on this quiz ships with a detailed step-by-step solution so you don't just learn the right answer — you learn the reasoning and shortcuts top scorers use to crack similar questions faster on the actual exam day. Why Data Structures & Algorithms Quiz matters in your preparation: government exam-conducting bodies repeatedly draw questions from the same chapters and the same skill-clusters across recruitment cycles. By attempting focused topic-wise quizzes like this one, you build pattern recognition — the ability to spot which formula, rule or trick applies the moment you see a question. Toppers consistently report that 5-10 quizzes on a single topic delivers more exam-day score gain than 20+ unfocused full-length mocks, because targeted drilling exposes your specific sub-topic weaknesses with surgical precision. How to use this quiz effectively: attempt it in one sitting under the 10-minute timer, without referring to notes or external resources — simulate exam-day conditions exactly. After submission, review the auto-generated analytics to see your accuracy, time per question and section-wise performance. Then go through every wrong and skipped question with the explanation, mentally tagging the underlying concept rather than just memorising the answer. Revisit this quiz after 7-10 days; your second attempt should be 15-20% faster with noticeably better accuracy. Bookmark this page and revisit weekly as we add new quizzes on related topics. AajExam quiz design principles: every quiz on the platform is curated by subject experts using the actual question formats, difficulty distributions and time pressures of the target government exams. We deliberately avoid generic "textbook" questions in favour of exam-replicating ones. Solutions are written in plain English (and Hindi where source material was bilingual), with step-by-step working for quantitative problems, grammar rules for English questions, and direct reference statements for general awareness items. Performance analytics after each attempt include accuracy, attempt rate, time spent per question, and an estimated all-India percentile so you know exactly where you stand against other candidates. This quiz is completely free to attempt. You only need a free AajExam account to track your performance across attempts, view detailed solutions and unlock the platform-wide analytics dashboard. The platform is mobile-friendly and works seamlessly on smartphones, tablets and desktops — so you can sharpen your Data Structures & Algorithms (Computer Science) skills in any spare 15-minute window.
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Data Structures & Algorithms Quiz — Questions with Solutions

All 10 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.

  1. Q1.Which data structure works on the LIFO principle?

    • A.Tree
    • B.Queue
    • C.Array
    • D.Stack
    Show answer

    Answer: D. Stack

    A stack is Last In First Out.

  2. Q2.Which data structure works on the FIFO principle?

    • A.Stack
    • B.Queue
    • C.Tree
    • D.Graph
    Show answer

    Answer: B. Queue

    A queue is First In First Out.

  3. Q3.The time complexity of binary search on a sorted array of n elements is

    • A.O(log n)
    • B.O(n log n)
    • C.O(1)
    • D.O(n)
    Show answer

    Answer: A. O(log n)

    Binary search halves the search space each step.

  4. Q4.Which sorting algorithm has the worst-case time complexity of O(n^2)?

    • A.None
    • B.Heap sort
    • C.Bubble sort
    • D.Merge sort
    Show answer

    Answer: C. Bubble sort

    Bubble sort takes O(n^2) in the worst case.

  5. Q5.In a linked list, each node contains

    • A.Data and a pointer to the next node
    • B.Only data
    • C.Only a pointer
    • D.An array
    Show answer

    Answer: A. Data and a pointer to the next node

    A node stores data and a link to the next node.

  6. Q6.Which traversal of a binary search tree gives sorted order?

    • A.Level order
    • B.Inorder
    • C.Preorder
    • D.Postorder
    Show answer

    Answer: B. Inorder

    Inorder traversal of a BST gives ascending order.

  7. Q7.The maximum number of children of a node in a binary tree is

    • A.3
    • B.4
    • C.2
    • D.1
    Show answer

    Answer: C. 2

    A binary tree node has at most two children.

  8. Q8.Which data structure is used for the breadth-first search of a graph?

    • A.Stack
    • B.Array only
    • C.Heap
    • D.Queue
    Show answer

    Answer: D. Queue

    BFS uses a queue.

  9. Q9.An algorithm is

    • A.A type of hardware
    • B.A compiler
    • C.A step-by-step procedure to solve a problem
    • D.A programming language
    Show answer

    Answer: C. A step-by-step procedure to solve a problem

    An algorithm is a finite sequence of steps.

  10. Q10.Which operation removes the top element of a stack?

    • A.Push
    • B.Insert
    • C.Peek
    • D.Pop
    Show answer

    Answer: D. Pop

    Pop removes the top element.

Frequently Asked Questions

Is Data Structures & Algorithms Quiz free to attempt on AajExam?

Yes. Data Structures & Algorithms Quiz is completely free. You only need a free AajExam account to track your score, view detailed solutions and unlock cross-attempt analytics.

How long does it take to complete Data Structures & Algorithms Quiz?

Data Structures & Algorithms Quiz runs on a 10-minute timer in real exam-style conditions. The clock starts the moment you click Start, mirroring the time pressure of the actual exam.

Are detailed solutions provided?

Yes. Every question on Data Structures & Algorithms Quiz ships with a complete step-by-step solution, the underlying concept, and (where applicable) shortcut tricks. You can also discuss any question with the AajExam community.

Can I attempt Data Structures & Algorithms Quiz multiple times?

Yes. You can attempt this quiz as many times as you like. Each attempt is recorded separately so you can track improvement in score, accuracy and time-management.

Which government exams does this quiz prepare me for?

Data Structures & Algorithms questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.