Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
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
1
What term describes a network architecture that integrates two or more distinct network topologies?
Answer:
Hybrid
A hybrid topology is a type of network topology that combines two or more different types of topologies, such as star, bus, or ring, to form a larger, more complex network structure.
2
How many pairs of wires are contained within a standard RJ45 UTP cable?
Answer:
4 pair
An RJ45 Unshielded Twisted Pair (UTP) cable, commonly used for Ethernet networking, consists of eight individual copper wires twisted into four distinct pairs.
3
Which network topology relies on a central hub to facilitate communication between connected devices?
Answer:
Star
In a star topology, every node is connected to a central network device, such as a hub or a switch.
4
What is the term for a communication device that is capable of both transmitting and receiving data signals?
Answer:
Transceiver
A transceiver is a device that combines both a transmitter and a receiver into a single unit. This integration allows the device to send and receive information over a communication channel.
5
What is the name of the hardware device that connects a computer to network media?
Answer:
NIC
A Network Interface Card (NIC) is a hardware component that provides a physical connection between a computer and a network. It acts as the interface that allows the computer to communicate with other devices on the network using various protocols.
6
Which network topology is traditionally associated with Ethernet implementations?
Answer:
bus
Early implementations of Ethernet (such as 10BASE5 and 10BASE2) utilized a bus topology, where all devices were connected to a single central cable.
7
Which device is primarily responsible for performing signal conversion between digital and analog formats?
Answer:
Modulator
A modulator is a component that varies properties of a carrier signal to encode information. In the context of data transmission, modulation is essential for converting digital data into a format suitable for transmission over analog media.
8
Which device is responsible for converting digital computer output into signals suitable for transmission over telephone lines?
Answer:
Modem
A modem (modulator–demodulator) is a network hardware device that modulates carrier signals to encode digital information for transmission and demodulates signals to decode it, facilitating communication over analog lines like telephone lines.
9
Which of the following options is classified as a network topology?
Answer:
BUS
A network topology refers to the physical or logical arrangement of nodes and connections in a network.
10
Which network topology is recognized for providing the highest level of reliability?
Answer:
mesh
A mesh topology is considered the most reliable because it provides multiple redundant paths for data transmission.