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
251
What does HTTP stand for?
Answer:
Hypertext Transfer Protocol
HTTP enables communication between web browsers and servers, allowing access to online content.
252
What does TCP stand for in the context of computer networking?
Answer:
Transmission Control Protocol
TCP stands for Transmission Control Protocol. It is one of the main protocols of the Internet protocol suite. It provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts communicating via an IP network.
253
Start and stop bits in serial communication are used for:
Answer:
Synchronization
In asynchronous communication, start and stop bits are used to synchronize the receiver's clock with the incoming data stream for each character.
254
Identify the signal that is not a standard RS 232-C signal.
Answer:
VDR
VDR is not defined in the RS 232-C standards, while signals like RTS and DSR are standard.
255
Which protocol provides complete transport layer services to applications?
Answer:
TCP
TCP (Transmission Control Protocol) provides reliable, ordered, and error-checked delivery of a stream of data between applications.
256
A sine wave is:
Answer:
Periodic and continuous
A sine wave is a smooth, continuous waveform that repeats at regular intervals, making it periodic.
257
An example of a moderate-speed switched communications service is:
Answer:
Data phone 50
Dataphone 50 represents medium-speed switched data services.
258
If a signal’s bandwidth is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?
Answer:
57 KHz
The highest frequency is the sum of the lowest frequency and the bandwidth (52 KHz + 5 KHz = 57 KHz).
259
Which translates domain names into IP addresses?
Answer:
DNS Schemes
DNS, which stands for Domain Name System, is the internet's system for converting human-readable domain names (like [www.google.com](https://www.google.com)) into the numerical IP addresses (like 172.217.16.142) that computers use to identify each other.
260
What does MAC stand for in networking?
Answer:
Media Access Control
A MAC address is a unique identifier assigned to network interfaces for communication.