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
2511
A computer's accuracy is dependent on:
Answer:
The user's instructions and the input data.
** While computers are highly accurate machines, their output is entirely dependent on the correctness of the input data and the instructions given to them. This is often referred to as "Garbage In, Garbage Out" (GIGO).
2512
**Which of the following is an example of an input device?**
Answer:
Keyboard
** An input device is any hardware device that sends data to a computer, allowing you to interact with and control it. A keyboard sends text and command inputs to the computer.
2513
**What does 'volatile memory' mean in the context of computers?**
Answer:
It requires power to maintain the stored information; it loses its contents when power is turned off
** RAM (Random Access Memory) is the most common type of volatile memory. When you turn off your computer, anything stored in RAM is lost.
2514
**What does the acronym 'CPU' stand for?**
Answer:
Central Processing Unit
** The CPU is the electronic circuitry within a computer that executes instructions that make up a computer program. It is often referred to as the "brain" of the computer.
2515
**How is data organized in a spreadsheet application, a common tool in business and daily life?**
Answer:
In rows and columns
** Spreadsheet applications like Microsoft Excel or Google Sheets organize data in a grid of cells, which are the intersections of rows and columns. This structure is ideal for calculations, data analysis, and creating charts.
2516
**The process of starting or restarting a computer is called:**
Answer:
Booting
** Booting is the process that starts the operating system when the computer is turned on. It loads the operating system from the hard drive into the computer's RAM.
2517
Which of the following is an example of an analog computer?
Answer:
A slide rule
** A slide rule is a classic example of an analog computing device. It uses physical lengths on a set of scales to perform multiplication and division. Thermometers and speedometers are also examples of analog devices.
2518
**Wearable computers, such as smartwatches, are a category of:**
Answer:
Microcomputers
** Wearable devices contain small, specialized microprocessors and are a form of microcomputer designed to be worn on the body.
2519
**Which technology, an application of computers in banking, is used to read the special characters on the bottom of a check?**
Answer:
MICR (Magnetic Ink Character Recognition)
** MICR is a character-recognition technology used mainly by the banking industry to ease the processing and clearance of checks and other documents. The MICR encoding, called the MICR line, is at the bottom of checks.
2520
A major concern with online banking and e-commerce is:
Answer:
Security and privacy of data
** While online services are convenient, they also create risks of fraud, hacking, and data breaches. Therefore, ensuring robust security and protecting user privacy is a top priority for these applications.