Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
141
What does a 'man-in-the-middle' attack typically aim to achieve in advanced internet security?
Answer:
To secretly intercept and alter communications between two parties.
A man-in-the-middle (MITM) attack involves an attacker secretly relaying and possibly altering the communication between two parties who believe they are communicating directly with each other. This allows the attacker to eavesdrop or manipulate the data exchange.
142
Which protocol is primarily used for real-time communication over the internet, such as voice and video calls?
Answer:
RTP (Real-time Transport Protocol)
RTP (Real-time Transport Protocol) is designed to handle the transmission of real-time data, like audio and video streams, over IP networks. It provides features such as sequence numbering and timestamping to assist with reordering and synchronization.
143
The primary provider of \_\_ is the local cable TV company.
Answer:
Broadband
Cable companies are major providers of broadband internet access, typically delivered over coaxial cable networks.
144
Arrangement of Computer is called?
Answer:
Topology
In networking, topology refers to the physical or logical arrangement of nodes (like computers and switches) and connections within a network. Examples include bus, star, ring, and mesh topologies.
145
The receive equalizer reduces signal delay distortion using:
Answer:
Tapped delay lines
Tapped delay lines are used in equalizers to correct delay distortion.
146
Which type of media carries electromagnetic waves without a physical conductor?
Answer:
Unguided
Unguided media, or wireless media (e.g., radio waves, microwaves), transport electromagnetic waves without using a physical conductor.
147
What is the term for a network topology that combines multiple topologies?
Answer:
Hybrid
A hybrid topology is a network topology that integrates two or more different standard topologies, such as a star-bus or star-ring topology. This is done to leverage the advantages of different topology types in a single network.
148
What does MODEM stand for?
Answer:
Modulator And Demodulator
MODEM is a portmanteau of Modulator-Demodulator. It is a hardware device that converts digital data from a computer into an analog signal that can be transmitted over a telephone line (modulation) and converts incoming analog signals back into digital data (demodulation).
149
What is an advantage of fiber optic data transmission?
Answer:
All of the above
Fiber optics provide quick data rates, are difficult to tap, and have low noise.
150
What device helps improve mobile signals in low-coverage areas?
Answer:
Booster
Signal boosters amplify weak cellular signals for better connectivity.