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CDA Assistant / UDC Islamabad (BS-15/16) Computer Science: Most Important MCQs with Answers

Practise CDA Assistant / UDC Islamabad (BS-15/16) Computer Science most important MCQs in sets of about 20 questions with instant answers and explanations. This page focuses on critical must-know MCQs to prioritise before the exam, helping you build accuracy and speed for the actual CDA Assistant / UDC Islamabad (BS-15/16) paper.

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Sample CDA Assistant / UDC Islamabad (BS-15/16) Computer Science most important questions

  1. Q1. Which OOP principle allows a method to have different behaviors depending on the object calling it?

    • A) Inheritance
    • B) Encapsulation
    • C) Abstraction
    • D) Polymorphism

    Answer: Polymorphism

  2. Q2. In a hash table, what is the average time complexity for insertion and retrieval?

    • A) O(n)
    • B) O(log n)
    • C) O(n²)
    • D) O(1)

    Answer: O(1)

  3. Q3. What is the time complexity of linear search in an unsorted array?

    • A) O(1)
    • B) O(log n)
    • C) O(n)
    • D) O(n²)

    Answer: O(n)

  4. Q4. In a RIGHT JOIN, which table's rows are all returned regardless of a match?

    • A) Left table
    • B) Both tables equally
    • C) The joined result table
    • D) Right table

    Answer: Right table

  5. Q5. Which network type covers the smallest geographic area, typically a single room or building?

    • A) WAN
    • B) MAN
    • C) CAN
    • D) LAN

    Answer: LAN

Frequently asked questions

What are most important Computer Science MCQs for CDA Assistant / UDC Islamabad (BS-15/16)?

Most Important Computer Science MCQs are critical must-know MCQs to prioritise before the exam. On Imtehan they are grouped into short sets so you can review one topic at a time before moving to timed mocks.

How many CDA Assistant / UDC Islamabad (BS-15/16) Computer Science most important questions can I practise?

Imtehan organises CDA Assistant / UDC Islamabad (BS-15/16) Computer Science questions into multiple sets. Start with the sample questions below, then open a set to practise interactively with scoring and explanations.

Is CDA Assistant / UDC Islamabad (BS-15/16) Computer Science most important practice free?

Yes — you can practise CDA Assistant / UDC Islamabad (BS-15/16) Computer Science MCQs for free on Imtehan. Premium unlocks detailed analytics and unlimited mock attempts.

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