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Computer Science & Information Technology MCQs
Practice Computer Science & Information Technology multiple-choice questions for NASTP Institute of Information Technology 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.
[3, 8]
7
11
14
الشرحThe dot product is (1*3) + (2*4) = 3 + 8 = 11.
3x^2 + 2
x^2 + 2
3x^3 + 2x
2x^2 + 1
الشرحUsing the power rule, the derivative of x^n is nx^(n-1). Thus, the derivative of x^3 is 3x^2 and the derivative of 2x is 2.
The zero matrix
The identity matrix
The determinant of A
The matrix A itself
الشرحBy definition, the product of any invertible matrix and its inverse is the identity matrix, I.
0
1
Infinity
Undefined
الشرحThis is a fundamental trigonometric limit derived from the squeeze theorem.
5
7
12
25
الشرحThe magnitude is calculated as sqrt(3^2 + 4^2) = sqrt(9 + 16) = sqrt(25) = 5.
1
2
3
4
الشرحThe integral of x from 0 to 2 is [x^2/2] from 0 to 2, which equals (4/2) - 0 = 2.
6
12
24
4
الشرحSince there are 4 letters with 'A' repeating twice, the calculation is 4! / 2! = 24 / 2 = 12.
1/6
1/12
1/36
7/36
الشرحThere are 6 favorable outcomes (1,6), (2,5), (3,4), (4,3), (5,2), (6,1) out of 36 total combinations.
10
25
32
64
الشرحThe expression log2(x) = 5 is equivalent to 2^5 = x, which is 32.
-2
0
2
10
الشرحThe determinant is (ad - bc) = (1*4) - (2*3) = 4 - 6 = -2.
e^x
e^(2x)
x * e^(x-1)
0
الشرحThe derivative of e^x is e^x, so the second derivative remains e^x.
3
6
9
12
الشرحThe integral of 2x is x^2. Evaluating x^2 from 0 to 3 gives 3^2 - 0^2 = 9.
[[1, 1], [1, 1]]
[[0, 1], [1, 0]]
[[1, 0], [0, 1]]
[[2, 0], [0, 2]]
الشرحThe identity matrix has 1s on the main diagonal and 0s elsewhere.
First Law
Second Law
Third Law
Law of Universal Gravitation
الشرحNewton's Third Law defines the principle of action and reaction forces occurring in pairs.
Volt
Ampere
Ohm
Watt
الشرحThe Ohm is the SI unit of electrical resistance, defined as the resistance between two points of a conductor when a constant potential difference of 1 volt produces a current of 1 ampere.
Joule
Watt
Newton
Pascal
الشرحPower is defined as the rate of doing work, measured in Joules per second, or Watts.
Reflection
Refraction
Diffraction
Polarization
الشرحRefraction is the change in direction of a wave passing from one medium to another caused by its change in speed.
0 m/s^2
9.8 m/s^2
Constant velocity
Increasing exponentially
الشرحAcceleration due to gravity near Earth's surface is approximately 9.8 m/s^2.
Kirchhoff's Law
Ohm's Law
Faraday's Law
Lenz's Law
الشرحOhm's Law states that V = IR, where V is voltage, I is current, and R is resistance.
mv
m*v^2
0.5*m*v^2
m*g*h
الشرحThe formula for kinetic energy is 1/2 * mass * velocity squared.
Proton
Neutron
Electron
Photon
الشرحFree electrons moving through the lattice of metal atoms constitute an electric current.
Pressure decreases
Pressure increases
Pressure remains constant
Volume decreases
الشرحAccording to Gay-Lussac's Law, pressure is directly proportional to absolute temperature for a fixed volume of gas.
3 x 10^5 m/s
3 x 10^8 m/s
3 x 10^10 m/s
3 x 10^6 m/s
الشرحThe universal constant for the speed of light in a vacuum is approximately 300,000 km/s or 3 x 10^8 m/s.
1/2mv^2
mgh
ma
F/d
الشرحGravitational potential energy is defined by the product of mass, gravity, and height.
Mass and velocity
Position and momentum
Time and distance
Energy and force
الشرحHeisenberg's principle states that the position and momentum of a particle cannot both be known to arbitrary precision.
Red
Yellow
Green
Violet
الشرحIn the visible spectrum, violet light has the shortest wavelength and highest frequency.
0
7
14
1
الشرحA neutral solution has an equal concentration of hydronium and hydroxide ions, resulting in a pH of 7 at standard temperature.
Proton
Neutron
Electron
Nucleus
الشرحThe mass of an electron is approximately 1/1836th of a proton or neutron, making it effectively negligible in mass calculations.
4
6
8
12
الشرحCarbon is the sixth element in the periodic table, meaning it has 6 protons.
Ionic
Covalent
Metallic
Hydrogen
الشرحCovalent bonding is characterized by the sharing of electron pairs between atoms to achieve stability.
CH4
C2H6
CO2
CH3OH
الشرحMethane is the simplest alkane consisting of one carbon atom and four hydrogen atoms.
Oxygen
Hydrogen
Carbon Dioxide
Nitrogen
الشرحThe reaction of an acid and a metal carbonate produces salt, water, and carbon dioxide gas.
Increases activation energy
Decreases activation energy
Is consumed in the reaction
Changes the products
الشرحCatalysts increase the rate of reaction by providing an alternative pathway with lower activation energy.
0.5
1
2
10
الشرحAccording to Avogadro's law, one mole of any ideal gas occupies 22.4 liters at STP.
Oxygen
Fluorine
Chlorine
Nitrogen
الشرحFluorine is the most electronegative element due to its small size and high effective nuclear charge.
A reaction that absorbs heat
A reaction that releases heat
A reaction that produces no energy
A reaction that requires light
الشرحExothermic reactions release energy into the surroundings, usually in the form of heat.
Principal
Azimuthal
Magnetic
Spin
الشرحThe azimuthal quantum number (l) determines the shape of the orbital (s, p, d, f).
Combustion
Neutralization
Oxidation
Reduction
الشرحWhen an acid and a base react, they neutralize each other, producing water and a salt.
Protium
Deuterium
Tritium
Helium
الشرحProtium has zero neutrons, Deuterium has one, and Tritium has two.
Nucleus
Ribosome
Mitochondrion
Golgi apparatus
الشرحMitochondria are the site of cellular respiration, producing ATP, which provides energy for the cell.
Energy storage
Catalyzing chemical reactions
Storing genetic information
Building cell walls
الشرحDNA contains the instructions needed for an organism to develop, survive, and reproduce.
Respiration
Photosynthesis
Fermentation
Transpiration
الشرحPhotosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from CO2 and water.
Atom
Organ
Cell
Tissue
الشرحThe cell is universally accepted as the fundamental unit of life.
Stomach
Large Intestine
Small Intestine
Liver
الشرحThe small intestine is the primary site for the absorption of nutrients into the bloodstream.
DNA only
RNA only
Both DNA and RNA
Protein only
الشرحInfluenza is an RNA virus, meaning it stores its genetic information in RNA rather than DNA.
Red Blood Cells
White Blood Cells
Platelets
Plasma
الشرحLeukocytes (white blood cells) are key components of the immune system.
Nucleus
Ribosome
Golgi Apparatus
Lysosome
الشرحRibosomes serve as the site of biological protein synthesis (translation).
Fructose
Glucose
Lactose
Sucrose
الشرحGlucose is the direct product of photosynthesis used by the plant for energy.
Cerebrum
Cerebellum
Brainstem
Thalamus
الشرحThe cerebellum is responsible for maintaining posture, balance, and voluntary muscle coordination.
Adenine
Guanine
Cytosine
Uracil
الشرحRNA uses Uracil to pair with Adenine, whereas DNA uses Thymine.
Pinocytosis
Phagocytosis
Exocytosis
Diffusion
الشرحPhagocytosis is the process of engulfing solid particles, often described as cell eating.
Protein synthesis
ATP production
Modifying and packaging proteins
DNA replication
الشرحThe Golgi apparatus acts like a post office, processing, sorting, and packaging proteins for secretion.
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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 NASTP Institute of Information Technology 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.