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
111
In a standard Local Area Network (LAN) configuration, how are the individual computers typically interconnected?
Answer:
Cables
Most traditional Local Area Networks rely on physical cabling, such as Ethernet (twisted pair) or fiber optic cables, to establish reliable and high-speed connections between network nodes. While wireless LANs (WLANs) exist, wired connections remain the standard for foundational LAN architecture.
112
What is the standard bandwidth range allocated for a typical voice channel?
Answer:
0-4 KHz
In telecommunications, a standard voice-grade channel is typically allocated a bandwidth of 4 KHz, which is sufficient to carry human speech frequencies clearly for analog telephone systems.
113
Which type of data transmission is analogous to traffic flowing on a one-way residential street?
Answer:
Serial transmission
Serial transmission involves sending data bits one after another over a single channel, similar to vehicles moving in a single file on a one-way street. This contrasts with parallel transmission, where multiple bits are sent simultaneously across multiple channels.
114
Which IP address class is typically assigned to smaller organizations?
Answer:
Class C
Class C IP addresses are designed for small networks. They provide a large number of network IDs but a limited number of host IDs per network, making them ideal for organizations with fewer than 254 devices per subnet.
115
Which term collectively describes physical or wireless media used to transmit data between network nodes?
Answer:
Communication links
Communication links, also known as transmission media, refer to the physical or wireless paths used to connect devices in a network. Examples include coaxial cables, fiber optics, and microwave transmission, which facilitate the transfer of data between endpoints.
116
Which category of transmission media includes microwave and communication satellite technologies?
Answer:
Unguided media
Unguided media, also known as wireless media, uses electromagnetic waves to transmit signals through the air or space without the use of physical conductors like wires or cables.
117
Which communication medium requires a clear 'line-of-sight' path between the transmitter and the receiver?
Answer:
Microwave
Microwave transmission requires a direct, unobstructed line-of-sight between the transmitting and receiving antennas because the signals travel in straight lines and cannot easily penetrate obstacles like buildings or mountains.
118
What is the primary distinguishing factor between a Local Area Network (LAN) and a Wide Area Network (WAN)?
Answer:
Distance
The fundamental difference between a LAN and a WAN is the geographical distance they cover. A LAN is restricted to a small area like a room or building, whereas a WAN spans large distances, such as cities, states, or even across the entire globe.
119
Which communication mode is typically utilized during standard internet surfing or web browsing?
Answer:
Full-duplex
Internet browsing requires full-duplex communication because the client sends requests to the server and receives data back simultaneously or in rapid succession, allowing for interactive and bidirectional data exchange over the network connection.
120
Which mode of data transmission is characterized by a one-way flow of information, such as a television broadcast?
Answer:
Simplex
Simplex transmission is a communication mode where data flows in only one direction. In a television broadcast, the signal is sent from the transmitter to the receiver without any return path for data, making it a classic example of unidirectional communication.