Pakistan Institute of Engineering and Applied Sciences11 Questions

Computer Science MCQs

Practice Computer Science multiple-choice questions for Pakistan Institute of Engineering and Applied Sciences competitive exams. Each question includes the correct answer and a short explanation, and past-paper questions are marked so you can revise both repeated and fresh material in one place.

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Queue

Stack

Linked List

Binary Tree

ExplanationA stack follows the LIFO principle where the last element added is the first one to be removed.

Data Link

Network

Transport

Session

ExplanationThe Network layer is responsible for logical addressing (like IP addresses) and routing.

O(n)

O(n log n)

O(log n)

O(1)

ExplanationBinary search repeatedly halves the search space, leading to logarithmic complexity.

RAM

Cache

ROM

Registers

ExplanationROM (Read-Only Memory) retains data even when power is turned off.

static

const

final

virtual

ExplanationThe 'final' specifier prevents a class from being inherited or a virtual function from being overridden.

Clears all data

Removes the table structure

Hides the table

Renames the table

ExplanationDROP TABLE deletes the entire table definition and all its data from the database.

O(n)

O(n log n)

O(n^2)

O(log n)

ExplanationQuickSort's worst case occurs when the pivot is consistently the smallest or largest element, leading to unbalanced partitions.

Immediate

Direct

Indirect

Indexed

ExplanationIn direct addressing, the operand field contains the memory address of the data.

Isolation

Integration

Indexing

Interoperability

ExplanationACID stands for Atomicity, Consistency, Isolation, and Durability.

Application

Network

Host-to-Host

Data Link

ExplanationThe Host-to-Host layer in the TCP/IP suite provides communication between end-user devices, mirroring the Transport layer of OSI.

1110

1100

0110

1011

ExplanationXOR results in 1 where bits are different: 1^0=1, 0^1=1, 1^0=1, 1^1=0, yielding 1110.

Frequently Asked Questions

Are these Computer Science MCQs free?

Yes. Every Computer Science MCQ on this page is free to practice, including the correct answer and explanation.

Do these include past-paper questions?

Yes — questions sourced from past papers are clearly marked with a "Past Paper" badge, alongside fresh practice questions.

Which exams do these Computer Science MCQs help with?

They are aimed at Pakistan Institute of Engineering and Applied Sciences and related Pakistani competitive exams that test Computer Science.

How should I practice subject-wise MCQs?

Attempt each question first, then reveal the answer and read the explanation. Short, focused sessions on one subject work better than long unstructured reading.