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Computer Science & Information Technology MCQs
Practice Computer Science & Information Technology multiple-choice questions for Air University 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.
5
11
17
23
Explanationf(3) = 2(3)^2 - 4(3) + 5 = 2(9) - 12 + 5 = 18 - 12 + 5 = 11.
3/5
-3/5
5/3
-5/3
ExplanationRearranging to y = mx + b, we get -5y = -3x + 10, so y = (3/5)x - 2. The slope m is 3/5.
2
3
4
9
ExplanationSince log(x) 81 = 4, this is equivalent to x^4 = 81. Taking the fourth root of 81 gives 3.
x^2 + 5
3x^2 + 5
3x^2 + 5x
x^3 + 5
ExplanationUsing the power rule, the derivative of x^n is nx^(n-1). Thus, 3x^2 + 5.
Acute
Obtuse
Right
Equilateral
ExplanationUsing the Pythagorean theorem, 6^2 + 8^2 = 36 + 64 = 100, which equals 10^2. This satisfies a^2 + b^2 = c^2.
150
155
160
165
ExplanationSum = n/2 * [2a + (n-1)d]. 10/2 * [2(2) + 9(3)] = 5 * [4 + 27] = 5 * 31 = 155.
0
0.5
1
undefined
ExplanationThe sine of 90 degrees in a unit circle is always 1.
2x2
3x3
2x3
3x2
ExplanationWhen multiplying an m x n matrix by an n x p matrix, the resulting matrix has dimensions m x p.
x > 3
x < 3
x > 8
x < 8
ExplanationSubtract 5 from both sides: 2x > 6. Divide by 2: x > 3.
1/6
1/12
1/36
7/36
ExplanationThere are 6 combinations that result in 7 (1+6, 2+5, 3+4, 4+3, 5+2, 6+1) out of 36 total outcomes. 6/36 = 1/6.
y = x
y = 2x
y = 4x
y = 1/2x
ExplanationThe slope m = (4-0)/(2-0) = 2. Since it passes through the origin, the intercept is 0, so y = 2x.
1
-1
i
-i
ExplanationBy definition, the imaginary unit i is the square root of -1, so i^2 = -1.
RAM
Cache
ROM
Registers
ExplanationROM (Read-Only Memory) retains its data even when power is turned off, making it non-volatile.
Encapsulation
Polymorphism
Abstraction
Inheritance
ExplanationInheritance is the mechanism where a new class derives properties and behaviors from an existing base class.
Data Link
Network
Transport
Session
ExplanationThe Network layer (Layer 3) handles logical addressing and routing packets between networks.
Queue
Linked List
Stack
Binary Tree
ExplanationA stack is a LIFO structure where the last item added is the first one to be removed.
Standard Query Language
Structured Query Language
Simple Query Logic
System Question Language
ExplanationSQL is the standard language for managing and manipulating relational databases.
Assembly
Machine Code
Python
Binary
ExplanationPython is an interpreted, high-level language, unlike assembly or binary code.
User interface management
Memory and process management
Web browsing
File compression
ExplanationThe kernel is the core of the OS, managing low-level hardware resources like CPU and memory.
9
10
11
13
Explanation1*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 8 + 0 + 2 + 1 = 11.
Apache
MySQL
Google Chrome
Eclipse
ExplanationMySQL is a popular open-source relational database management system.
To debug code
To convert high-level code to machine code
To execute code line-by-line
To store data permanently
ExplanationA compiler translates human-readable source code into machine-executable code.
HTTP
FTP
HTTPS
SMTP
ExplanationHTTPS adds a layer of encryption (SSL/TLS) to standard HTTP communication.
Central Processing Unit
Computer Peripheral Unit
Central Program Utility
Control Processing Unit
ExplanationThe CPU is the primary component of a computer that performs most of the processing inside the computer.
Neither the students nor the teacher were there.
Neither the students nor the teacher was there.
Neither the students nor the teacher are there.
Neither the students nor the teacher have been there.
ExplanationIn 'neither/nor' constructions, the verb agrees with the subject closest to it (the teacher).
Eternal
Permanent
Fleeting
Constant
ExplanationEphemeral refers to something lasting for a very short time, which is synonymous with fleeting.
is
are
were
been
ExplanationThe word 'team' is a collective noun usually treated as a singular unit in this context.
Kind
Stingy
Brave
Wealthy
ExplanationGenerous means giving, whereas stingy means reluctant to give.
He went to the store, and bought milk.
He went to the store and, bought milk.
He went to the store and bought milk.
He, went to the store and bought milk.
ExplanationThere is no need for a comma before 'and' when connecting two verbs with the same subject.
Accomodation
Accommodation
Acommodation
Acommodattion
ExplanationAccommodation is spelled with two c's and two m's.
Something very difficult
Something very easy
A dessert
A surprise
ExplanationThe idiom 'piece of cake' refers to a task that is simple to complete.
at
on
in
with
ExplanationThe correct idiomatic preposition following 'interested' is 'in'.
Gallery
Frame
Artist
Brush
ExplanationAn author creates a book, just as an artist creates a painting.
Dull
Bright
Obscure
Faded
ExplanationVivid means producing powerful feelings or strong, clear images in the mind; bright is a synonym.
I eat lunch.
I have eaten lunch.
I had eaten lunch.
I was eating lunch.
ExplanationThe past perfect tense is formed by 'had' + past participle.
Criterions
Criteria
Criterias
Criterion
ExplanationCriteria is the plural form of the singular noun criterion.
PSBOHF
PQBOHF
PSBOHG
PSBPHF
ExplanationEach letter is shifted by one position in the alphabet: A+1=B, P+1=Q, P+1=Q, L+1=M, E+1=F. Applying this to ORANGE: O+1=P, R+1=S, A+1=B, N+1=O, G+1=H, E+1=F.
His father
His son
Himself
His uncle
ExplanationSince the man has no brothers (being the only son), the only son of his father is the man himself.
48
64
40
56
ExplanationEach number is doubled to get the next number in the sequence.
Yes
No
Maybe
Impossible to tell
ExplanationThe premises don't state that roses are among the flowers that fade. It is possible but not certain.
A
B
C
None of them
ExplanationSince A > B and C > A, the order is C > A > B, making B the shortest.
DX
DW
EW
DV
ExplanationThe first letter increases by 1 (A, B, C, D) and the second letter decreases by 1 (Z, Y, X, W).
TCA
TAC
ACT
ATC
ExplanationThe code reverses the order of the letters (Last, Middle, First).
Sarah
Tom
Mike
Anna
ExplanationThe order from front to back is Anna > Mike > Tom > Sarah > Jessica.
Car
Bus
Bicycle
Ship
ExplanationCar, bus, and bicycle are land vehicles, whereas a ship is a water vehicle.
Tuesday
Wednesday
Thursday
Friday
Explanation30 divided by 7 is 4 remainder 2. Monday + 2 days = Wednesday.
Apple
Banana
Carrot
Orange
ExplanationCarrot is a vegetable, while the others are fruits.
Q+S-T
Q+S+T
Q-S+T
Q-S-T
ExplanationSubstitute R with (S-T) in the first equation: P = Q + (S-T) = Q+S-T.
0 degrees
7.5 degrees
15 degrees
30 degrees
ExplanationAt 3:00, the angle is 90 degrees. In 15 minutes, the hour hand moves 7.5 degrees (0.5 * 15), closing the gap.
Page
Cover
Author
Reading
ExplanationA roof protects the top of a house; a cover protects the outside of a book.
Frequently Asked Questions
Are these Computer Science & Information Technology MCQs free?
Yes. Every Computer Science & Information Technology 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 & Information Technology MCQs help with?
They are aimed at Air University and related Pakistani competitive exams that test Computer Science & Information Technology.
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.