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
261
The smallest unit of data in a computer is__________?
Answer:
Bit
A 'bit' (short for binary digit) is the most fundamental unit of data in computing. It can only have one of two values, either 0 or 1. All other data units, such as bytes, kilobytes, and terabytes, are composed of collections of bits.
262
What is the full form of CAM in manufacturing?
Answer:
Computer Aided Manufacturing
CAM stands for Computer-Aided Manufacturing. It refers to the use of computer software to control machine tools and related machinery in the manufacturing process. CAM helps improve precision, efficiency, and automation in production.
263
A desktop computer, a laptop, and a tablet are all types of:
Answer:
Microcomputers
** These are all examples of personal computers, which are the most common form of microcomputer. They are designed for use by a single individual at a time.
264
**Which of the following is an example of an output device?**
Answer:
Printer
** An output device is any hardware device that receives data from a computer and translates it into another form. A printer takes digital data from the computer and produces a physical copy (hard copy).
265
The category of 'minicomputer' is now largely considered obsolete because:
Answer:
The distinction between powerful microcomputers (servers) and smaller mainframes has blurred.
** The rapid increase in the power of microcomputers meant that they could take on the roles previously filled by minicomputers. The term is not commonly used today, as the landscape is now dominated by microcomputers and larger mainframe/supercomputer systems.
266
**What technology is commonly used in retail stores to scan barcodes on products, which is an application of computers in daily life?**
Answer:
Barcode Reader
** A barcode reader is a handheld or stationary input device used to capture and read information contained in a barcode. This technology is widely used in retail stores for billing and inventory management, speeding up the checkout process.
267
Which of the following is a limitation of a computer?
Answer:
It has no intelligence of its own.
** A significant limitation of computers is that they do not possess their own intelligence or common sense. They can only follow the instructions given to them by humans. The field of Artificial Intelligence aims to overcome this limitation.
268
The use of computers in banking that allows customers to manage their accounts from anywhere using the internet is called:
Answer:
Online banking or internet banking
** Online banking allows customers to conduct a wide range of financial transactions through the financial institution's website or mobile app, providing convenience and 24/7 access to their accounts.
269
The speed of a computer is typically measured in:
Answer:
Megahertz (MHz) or Gigahertz (GHz)
** The speed of a computer's processor (CPU) is measured in terms of its clock speed, which is expressed in Hertz (Hz). Common units are Megahertz (MHz), representing millions of cycles per second, and Gigahertz (GHz), representing billions of cycles per second.
270
The basic operations performed by a computer are__________?
Answer:
All the above
Computers are versatile machines capable of performing a wide range of basic operations. These include arithmetic operations like addition and subtraction, logical operations such as comparisons (e.g., AND, OR), and the ability to store and retrieve data. Therefore, all the listed options are fundamental operations performed by a computer.