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
141
Which of the following is NOT a standard component of a data communication system?
Answer:
Voltage
The standard components of a data communication system include the sender, receiver, message, transmission medium, and protocol. While voltage is a physical property used to represent signals within the medium, it is not classified as a functional component of the communication system itself.
142
What is the primary function of a server within a computing network environment?
Answer:
Network
In a client-server architecture, a server is a dedicated computer that provides various services, data, or resources to other computers, known as clients, that are connected to the same network. The server manages network traffic and ensures that shared resources are accessible to authorized users.
143
What term describes a communication mode where data can be transmitted in both directions simultaneously?
Answer:
Full duplex
Full duplex communication allows data to flow in both directions at the same time, similar to a telephone conversation where both parties can speak and hear each other simultaneously.
144
Which communication mode allows for the simultaneous transmission of data in both directions between two devices?
Answer:
Full-duplex
Full-duplex communication allows data to be transmitted and received simultaneously between two connected devices. Unlike half-duplex, where communication occurs in both directions but not at the same time, full-duplex provides a dedicated path for both sending and receiving, effectively doubling the potential bandwidth for bidirectional traffic.
145
What is the standard full form of the term Wi-Fi?
Answer:
Wireless Fidelity
Wi-Fi is a popular wireless networking technology that uses radio waves to provide high-speed internet and network connections. Although often mistaken for an abbreviation of 'Wireless Fidelity', the term was created by a branding firm and does not actually stand for anything specific.
146
What is the process of converting digital data into an analog signal for transmission known as?
Answer:
Modulation
Modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that contains information to be transmitted. This allows digital data to be sent over analog communication channels.
147
Which transmission media can be utilized for communication across a Wide Area Network (WAN)?
Answer:
Any
Wide Area Networks are designed to cover vast distances and are not restricted to a single type of transmission medium. They frequently utilize a combination of technologies, including fiber optics, satellite links, microwave relays, and traditional telephone lines, to maintain connectivity across global regions.
148
In the context of asynchronous communication, which value is typically used to identify an idle line?
Answer:
0
In many asynchronous serial communication protocols, an idle line is held at a specific voltage level representing a logical zero or a specific state. This allows the receiver to detect the start of a new data frame when the signal transitions.
149
Which of the following is a 'Distance-Vector' routing protocol?
Answer:
RIP
The Routing Information Protocol (RIP) is a classic distance-vector protocol. It works by having each router share its entire routing table with its immediate neighbors at regular intervals. Routers use the Bellman-Ford algorithm to calculate the best path based on the hop count.
150
What is the primary difference between IPv4 and IPv6 header structures regarding fragmentation?
Answer:
IPv4 allows routers to fragment packets, whereas in IPv6, fragmentation is performed only by the source host.
In IPv4, intermediate routers can fragment packets if they exceed the MTU of the next link. In IPv6, routers are not allowed to fragment packets; they simply drop the packet and send an ICMPv6 'Packet Too Big' message back to the source. The source host is then responsible for performing Path MTU Discovery and fragmenting the data using an Extension Header if necessary.