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
2581
Which device is digital in nature?
Answer:
Digital Clock
Digital devices represent information using discrete values, typically binary digits (0s and 1s). A digital clock displays time using numbers, which is a discrete representation. In contrast, an analog speedometer and a clock with hands use continuous movement to represent values, making them analog devices.
2582
1 PB (Petabyte) is equal to:
Answer:
1024 TB
** A petabyte is the next unit of data storage after terabyte. In the binary system, 1 petabyte is equal to 1,024 terabytes.
2583
A group of 8 bits is called a:
Answer:
Byte
** A byte is a standard unit of digital information that consists of 8 bits. It is the amount of memory needed to store a single character of text in ASCII.
2584
The computer that process both analog and digital is called____________?
Answer:
Hybrid computer
A hybrid computer combines the features of both analog and digital computers. It can process continuous data (like measurements) from analog sources and discrete data (like numbers) from digital sources, making it useful in specialized scientific and industrial applications, such as in hospitals to measure a patient's heartbeat.
2585
**What is 'e-commerce', a major application of computers in daily life?**
Answer:
The buying and selling of goods or services using the internet
** E-commerce encompasses online retail, electronic payments, and online auctions, allowing consumers and businesses to conduct transactions electronically.
2586
**In banking, what is the role of a Core Banking System (CBS)?**
Answer:
A centralized system that enables bank branches to access customer accounts and perform transactions from any branch
** A CBS is a backend system that processes banking transactions and posts updates to accounts and other financial records. It is the heart of a modern bank's IT infrastructure.
2587
What is the equivalent size of 1 Gigabyte?
Answer:
1024 megabytes
In computer memory and storage, units are based on powers of 2. A kilobyte is 1024 bytes, a megabyte is 1024 kilobytes, and a gigabyte (GB) is 1024 megabytes (MB). This binary-based system is standard for measuring digital information capacity.
2588
A car's speedometer is an example of a(n):
Answer:
Digital device
** A traditional speedometer with a needle that moves along a dial is an analog device. It represents the car's speed as a continuous physical quantity (the angle of the needle). Modern digital speedometers, which display the speed as a number, are digital devices.
2589
The first commercially successful minicomputer was the:
Answer:
PDP-8
** The PDP-8, introduced by Digital Equipment Corporation (DEC) in 1965, is widely considered the first successful minicomputer. Its low cost and small size made computing accessible to many smaller organizations.
2590
**Which type of computer is characterized by its large size, high processing power, and use in large organizations for critical applications?**
Answer:
Mainframe computer
** Mainframe computers are powerful computers used primarily by large organizations for critical applications, bulk data processing, such as census, industry and consumer statistics, enterprise resource planning, and transaction processing.