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
3211
Which computers are used in weather forecasting?
Answer:
Supercomputers
Supercomputers perform complex calculations required for weather predictions.
3212
How is the output quality of a printer typically measured?
Answer:
Dot per inch
The resolution of a printer, which determines its output quality, is measured in DPI, or dots per inch. This value indicates how many individual dots of ink a printer can place in a one-inch line, with a higher DPI generally resulting in a sharper and more detailed image.
3213
Saving data to which storage keeps it intact even after the computer is turned off?
Answer:
Secondary storage device
Secondary storage like hard drives and SSDs retains data permanently until deleted.
3214
What is a digitizing tablet primarily used for?
Answer:
Tracing diagrams
Digitizing tablets allow users to trace and convert physical drawings into digital format.
3215
What is a type of short-term memory storage?
Answer:
Registers
In a computer's Central Processing Unit (CPU), registers are the fastest type of memory. They are small storage locations that hold data and instructions temporarily that the CPU is currently working on, providing extremely quick access for processing.
3216
If 8-bit integer max value is 256 possible values, what is the highest value for 16-bit integer?
Answer:
65,535
A 16-bit integer can represent values from 0 to 65,535 (2^16−1).
3217
What type of storage device is a DVD?
Answer:
optical disc
A DVD (Digital Versatile Disc) is a type of optical disc storage technology. Data is read from and written to the disc using a laser beam, which detects microscopic pits and lands on its surface. This is different from magnetic storage (hard disk) or flash memory (solid-state storage).
3218
What type of storage is hard disk drives considered?
Answer:
nonvolatile
Hard disk drives are a form of non-volatile storage. This means they retain the data written to them even when the computer's power is turned off. The data is stored magnetically on rotating platters, ensuring long-term persistence.
3219
When performing subtraction using 2's complement representation, the term used to designate the number being subtracted from another is the:
Answer:
Subtrahend
In any subtraction operation, regardless of the arithmetic system (like 2's complement for binary numbers), the number that is being subtracted is consistently referred to as the 'subtrahend'. The number from which the subtrahend is subtracted is called the 'minuend'.
3220
Which device is used to digitize physical documents or images?
Answer:
Scanner
Scanners convert hard copies of text or images into digital formats.