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
1
What device is used in banks to read and verify the data on cheques?
Answer:
Magnetic Ink Character Recognition
MICR (Magnetic Ink Character Recognition) is a specialized technology used by the banking industry to streamline the processing and clearance of cheques. The characters on the bottom of a cheque (like the cheque number and routing number) are printed in a special magnetic ink that can be read quickly and accurately by MICR reader devices.
2
A terabyte (TB) is approximately:
Answer:
One trillion bytes
** A terabyte is a massive amount of storage. It is 10^12 bytes in the decimal system, which is one trillion bytes.
3
One Gigabyte (GB) is equal to:
Answer:
1024 MB
** In the binary system of measurement (often used for RAM), one gigabyte is precisely 1,024 (2^10) megabytes. In the decimal system (often used for hard drive storage), it is approximately 1,000 megabytes.
4
**Which of these is a characteristic of a tablet computer?**
Answer:
It uses a touchscreen as the primary input device
** A tablet is a portable computer that is primarily operated by touching the screen, making it a highly intuitive and mobile computing device.
5
A computer that can perform billions of instructions per second and is used for complex scientific calculations is a:
Answer:
Digital computer
** High-performance computing, including supercomputers that perform billions of operations per second, is based on digital computer architecture. Digital computers provide the necessary precision and programmability for such complex tasks.
6
A computer's ability to process different types of data, such as text, audio, and video, is an example of its:
Answer:
Versatility
** Versatility not only refers to the variety of tasks a computer can perform but also its ability to handle different forms of data. This makes computers a universal tool for information processing.
7
Which type of computer is characterized by its use of parallel processing with thousands of processors?
Answer:
Supercomputer
** To achieve their massive computational speeds, supercomputers use massively parallel architectures, where a problem is broken down and worked on by thousands or even millions of processor cores simultaneously.
8
**How are computers used in agriculture?**
Answer:
For precision farming, managing crop data, and controlling automated farm equipment
** Modern agriculture uses computer technology for tasks such as GPS-guided tractors, drone surveillance of fields, and data analysis to optimize crop yields and resource use.
9
**What does 'cloud computing' refer to?**
Answer:
The delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet ("the cloud")
** Cloud computing allows users to access and store data and programs over the internet instead of on their computer's hard drive, offering flexibility and scalability.
10
A computer cannot:
Answer:
Think on its own
** As mentioned earlier, computers lack independent thought and consciousness. They are tools that follow human instructions, although advancements in AI are blurring these lines.