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
When the overhead required to establish a communication link is significant relative to the small size of the data being transmitted, which data transfer mode is preferred?
Answer:
Packet switching
Packet switching is generally more efficient for small, bursty data transmissions because it does not require the dedicated end-to-end path setup time associated with circuit switching, which would be inefficient for short messages.
2
Which technology is most effective for connecting a large number of computers spread across a wide geographical area?
Answer:
Communications satellites
Communications satellites are essential for wide-area networking because they relay signals over vast distances, bypassing the need for physical cabling across difficult terrain.
3
Which of the following is a classic example of analog-to-analog signal conversion?
Answer:
Radio
Analog-to-analog conversion involves modulating an analog signal to carry information. Radio broadcasting is a primary example, where an analog audio signal is modulated onto a carrier wave to be transmitted over the airwaves as an analog signal.
4
What is the term for the condition where a network becomes overloaded with excessive data traffic, leading to a failure in delivering packets effectively?
Answer:
Congestion
Network congestion occurs when the volume of data traffic exceeds the capacity of the network links or nodes.
5
What is the term for communication that involves computers establishing a link through the telephone system?
Answer:
Telecommunications
Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, optical or electromagnetic systems.
6
Which of the following terms or concepts are commonly associated with computer networking?
Answer:
Both (A) and (B)
Computer networking involves various components and structures. A 'node' is a connection point in a network, and downloading is a common network activity. 'Star topology' is a specific physical layout used to connect devices.
7
What characterizes simplex transmission in data communication?
Answer:
Data transmission is one way
Simplex transmission is a mode of communication where data flows in only one direction. The sender can transmit, but the receiver cannot send data back.
8
Which hardware resource is most frequently shared among users within a typical computer network environment?
Answer:
Printers
Printers are the most common shared resource in a network because they are expensive and often underutilized by individual users. Network printing allows multiple workstations to send documents to a single centralized device, maximizing efficiency.
9
Which term describes a private network restricted to an organization's employees?
Answer:
intranet
An intranet is a private network accessible only to an organization's staff.
10
Which wireless technology is commonly integrated into electronic devices for short-range data exchange?
Answer:
Bluetooth
Bluetooth is a wireless technology standard designed for exchanging data over short distances using short-wavelength UHF radio waves in the 2.4 GHz ISM band.