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Computer Science & Information Technology MCQs
Practice Computer Science & Information Technology multiple-choice questions for Riphah International 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.
7
12
34
1
ExplanationThe number of elements in a matrix of order m x n is the product m * n. Here, 3 * 4 = 12.
-cos(x)
cos(x)
tan(x)
-sin(x)
ExplanationThe standard derivative of the sine function is the cosine function.
x^2 - 5x + 6 = 0
x^2 + 5x + 6 = 0
x^2 - 6x + 5 = 0
x^2 + 6x + 5 = 0
ExplanationA quadratic equation can be written as x^2 - (sum of roots)x + (product of roots) = 0.
4
5
6
8
ExplanationSince 2^5 = 32, log_2(32) is equal to 5.
3/4
-3/4
4/3
-4/3
ExplanationRearranging the equation to y = mx + c gives 4y = 3x + 7, or y = (3/4)x + 7/4. The slope m is 3/4.
12
24
48
6
ExplanationThe number of arrangements is 4! = 4 x 3 x 2 x 1 = 24.
0
1
2
0.5
Explanationsin(90) = 1 and cos(0) = 1. Therefore, 1 + 1 = 2.
0
1
-1
2
ExplanationThe determinant of an identity matrix of any size is always 1.
4
5
6
7
ExplanationSubstitute 1 for x: 1^2 + 3(1) + 2 = 1 + 3 + 2 = 6.
90
180
270
360
ExplanationA full rotation around a point corresponds to 360 degrees.
Gauss's Law
Ohm's Law
Coulomb's Law
Ampere's Law
ExplanationCoulomb's Law defines the electrostatic force between two stationary point charges.
Joule
Watt
Newton
Pascal
ExplanationPower is defined as energy per unit time, and its SI unit is the Watt (W).
Increasing
Decreasing
Zero
Constant and non-zero
ExplanationAcceleration is defined as the rate of change of velocity. If velocity is constant, the change is zero.
Violet
Green
Yellow
Red
ExplanationIn the visible spectrum, red light has the longest wavelength and the lowest frequency.
60 kg
10 kg
360 kg
6 kg
ExplanationWeight is mass multiplied by gravity. Since lunar gravity is 1/6th of Earth's, the weight effectively reduces to 60/6 = 10.
Speed
Wavelength
Frequency
Amplitude
ExplanationThe frequency of a wave is determined by the source and remains constant regardless of the medium it travels through.
mv
m^2v
0.5 * m * v^2
m * v^2
ExplanationThe standard formula for kinetic energy is KE = 1/2 * mass * velocity squared.
Reflection
Refraction
Diffraction
Polarization
ExplanationRefraction is the change in direction of a wave passing from one medium to another caused by its change in speed.
Volt
Ampere
Ohm
Watt
ExplanationThe Ohm is the SI unit of electrical resistance, named after Georg Simon Ohm.
3 x 10^5 m/s
3 x 10^8 m/s
3 x 10^10 m/s
3 x 10^6 m/s
ExplanationThe speed of light in a vacuum is defined as exactly 299,792,458 meters per second, roughly 300,000 km/s.
Proton
Neutron
Electron
Positron
ExplanationElectrons are negatively charged subatomic particles that orbit the nucleus.
Above 7
Exactly 7
Below 7
0 to 14
ExplanationOn the pH scale, values below 7 indicate acidity, while values above 7 indicate alkalinity.
Nitrogen
Oxygen
Neon
Hydrogen
ExplanationNeon is a noble gas (Group 18), characterized by a full valence shell, making it chemically inert.
HCl
H2SO4
HNO3
NaOH
ExplanationSulfuric acid is a mineral acid composed of elements sulfur, oxygen, and hydrogen with the formula H2SO4.
Groups
Families
Periods
Blocks
ExplanationHorizontal rows in the periodic table are referred to as periods, while vertical columns are groups.
Covalent bond
Ionic bond
Hydrogen bond
Metallic bond
ExplanationIonic bonds occur due to the electrostatic attraction between oppositely charged ions created by electron transfer.
+1
-1
0
Dependent on the element
ExplanationBy definition, the oxidation state of an atom in its elemental form is zero.
Oxygen
Nitrogen
Carbon
Hydrogen
ExplanationCarbon is the sixth element in the periodic table, having 6 protons in its nucleus.
Combination
Decomposition
Single displacement
Double displacement
ExplanationIn a double displacement reaction, the cations and anions of two compounds switch places to form two new compounds.
Oxygen
Carbon Dioxide
Nitrogen
Argon
ExplanationNitrogen makes up approximately 78% of Earth's atmosphere.
Nucleus
Mitochondria
Ribosome
Golgi apparatus
ExplanationMitochondria are responsible for generating most of the cell's supply of adenosine triphosphate (ATP), which is used as a source of chemical energy.
Glucose
Lactose
Fructose
Sucrose
ExplanationPhotosynthesis converts light energy into chemical energy, primarily in the form of glucose.
A+
B-
AB+
O-
ExplanationType O- blood cells lack A, B, and Rh antigens, meaning they can be donated to individuals of any blood type.
Cerebrum
Cerebellum
Medulla
Thalamus
ExplanationThe cerebellum is the region of the brain responsible for maintaining posture, balance, and motor coordination.
Tissue
Organ
Cell
Molecule
ExplanationThe cell is universally accepted as the fundamental structural and functional unit of all living organisms.
Cytosine
Guanine
Thymine
Uracil
ExplanationAccording to base-pairing rules in DNA, Adenine (A) bonds with Thymine (T) via two hydrogen bonds.
Vitamin A
Vitamin C
Vitamin D
Vitamin K
ExplanationUltraviolet B rays from sunlight trigger the synthesis of Vitamin D in the skin.
Respiration
Transpiration
Photosynthesis
Fermentation
ExplanationPhotosynthesis is the process used by plants to convert light energy into chemical energy stored in glucose.
Adenine
Guanine
Cytosine
Uracil
ExplanationUracil replaces thymine in RNA molecules.
Fight infection
Clot blood
Transport oxygen
Produce hormones
ExplanationRed blood cells contain hemoglobin, which binds to oxygen to transport it throughout the body.
DAERB
BREAD
DERAB
EARDB
ExplanationThe pattern is reversing the string. Reversing 'BREAD' yields 'DAERB'.
20
24
32
64
ExplanationThe sequence follows the rule 2^n. 2^1=2, 2^2=4, 2^3=8, 2^4=16, 2^5=32.
3-1-20
1-3-20
20-1-3
3-20-1
ExplanationEach letter corresponds to its position in the alphabet: C=3, A=1, T=20.
0 degrees
7.5 degrees
15 degrees
30 degrees
ExplanationAt 3:15, the minute hand is at 3, but the hour hand has moved 1/4th of the way from 3 to 4. Each hour mark is 30 degrees, so 1/4 * 30 = 7.5.
50
60
80
100
ExplanationEach number is double the previous number.
All roses are red.
Some roses are red.
Some flowers are roses.
All red things are flowers.
ExplanationSince all roses are flowers, it logically follows that some flowers are roses (the set of roses is a subset of flowers).
H
I
J
K
ExplanationThe sequence skips one letter each time (A, skip B, C, skip D, E, skip F, G, skip H, I).
5 km
6 km
7 km
1 km
ExplanationUsing the Pythagorean theorem: sqrt(4^2 + 3^2) = sqrt(16 + 9) = sqrt(25) = 5 km.
Circle
Square
Triangle
Cube
ExplanationCube is a 3D object, while the others are 2D shapes.
Car
Bus
Bicycle
Ship
ExplanationCar, Bus, and Bicycle travel on land, while a Ship travels on water.
$24
$25
$26
$30
ExplanationOriginal price * 0.8 = 20. Original price = 20 / 0.8 = 25.
10
11
12
13
ExplanationThis is the Fibonacci sequence where each number is the sum of the two preceding ones.
CJSE
CJTE
CKSE
BKSE
ExplanationEach letter is shifted forward by one position in the alphabet (F->G, I->J, S->T, H->I).
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 Riphah International 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.