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Computer Science Mcqs with Answers

Practice Computer Science MCQs with answers covering programming, databases, networks, operating systems, algorithms, cybersecurity, web development and IT for FPSC, PPSC, SPSC, NTS, CSS and PMS exams.

Practice MCQs Solved Questions Exam Preparation
47 Total MCQs
17 Topics
40 Past Papers
Q41
______ is concerned with realizing a software design using an object-oriented programming language.
A Object-Oriented Methods
B Object-Oriented Methods
C Object-Oriented Design
D Object-Oriented Programming
Explanation
Object-Oriented Programming (OOP) is concerned with implementing software using an object-oriented programming language. It uses concepts such as classes, objects, inheritance, polymorphism, encapsulation, and abstraction.
Q42
What is the minimum number of wires needed to send data over a serial communication link?
A 1
B 2
C 3
D 4
Explanation
Serial communication transmits data one bit at a time over a communication path. In its simplest form, a single wire can carry the data signal, with a common ground or reference assumed.
Q43
Which of the following is an example of a bounded transmission medium?
A Coaxial cable
B Waveguide
C Fiber-optic cable
D All of the above
Explanation
Bounded or guided transmission media provide a physical path for signals. Coaxial cables, waveguides, and fiber-optic cables all guide signals through a defined physical medium.
Q44
A coaxial cable consists of conductors that have:
A A common axis
B Equal resistance
C The same diameter
D None of the above
Explanation
The term coaxial means that the conductors share the same axis. A coaxial cable typically has a central conductor surrounded by insulation, a metallic shield, and an outer protective jacket.
Q45
The area covered by a satellite radio beam is called its:
A Beam width
B Circular polarization
C Footprint
D Identity
Explanation
A satellite's footprint is the geographical area on Earth's surface where its transmitted signal can be received effectively.
Q46
The amount of uncertainty associated with a system or symbol is called:
A Bandwidth
B Entropy
C Loss
D Quantum
Explanation
In information theory, entropy measures the uncertainty or randomness associated with information. Higher entropy generally means greater uncertainty about the outcome of a symbol or event.
Q47
Buffering is the process of:
A Temporarily storing data to accommodate variations in device speeds
B Reducing cross-talk
C Storing data within the transmission medium until the receiver is ready
D Reducing routing overhead
Explanation
Buffering temporarily stores data in a memory area called a buffer. It helps manage differences in the speeds at which devices produce and process data.
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COMPUTER SCIENCE

Computer Science MCQs cover important concepts in programming, databases, computer networks, operating systems, data structures, algorithms, software engineering, cybersecurity, web technologies and information technology. This collection helps students and candidates revise essential computer concepts and prepare for FPSC, PPSC, SPSC, NTS, CSS, PMS and other competitive examinations.