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
3331
Which type of memory does a magnetic disk belong to?
Answer:
Secondary memory
A magnetic disk, such as a hard drive, is a form of secondary memory (or storage). It is non-volatile, meaning it retains data when the power is off, and is used for long-term storage of files and the operating system. Primary memory (like RAM) is volatile and holds data the CPU is actively using.
3332
Decimal numbers are converted to excess-3 code by adding:
Answer:
3
Excess-3 code is obtained by adding 3 to each decimal digit.
3333
Which of the following is NOT true about 4GL (Fourth Generation Language)?
Answer:
4GL does not support a high level of screen interaction
4GLs are designed to support advanced screen interaction and rapid development, so statement B is false.
3334
The two main types of main memory are:
Answer:
ROM and RAM
Main memory consists of Read Only Memory (ROM) and Random Access Memory (RAM).
3335
Saving to which device ensures data remains intact even after power is off?
Answer:
Secondary storage device
Secondary storage like hard drives and SSDs retains data without power.
3336
A memory capable of determining whether a given datum is contained at one of its addresses is called:
Answer:
CAM (Content Addressable Memory)
CAM allows data retrieval by content rather than by address.
3337
Computers use which number system to store data?
Answer:
base 2
Computers operate in the binary system (base 2), using only digits 0 and 1 for all data processing and storage[10](https://cuvette.tech/blog/number-system-in-computers)[11](https://www.ccbp.in/blog/articles/number-system-in-computer-organization).
3338
If a user loses network and Internet access on a workstation, where is the best place to save a Word document?
Answer:
USB key
A USB key is a local, removable storage device accessible without network connection.
3339
Which of the following refers to the memory in your computer?
Answer:
RAM
RAM (Random Access Memory) is the main memory used for processing tasks in a computer.
3340
Which peripheral device is specifically designed to convert physical documents, images, or even three-dimensional objects into a digital format that can be stored and processed by a computer system?
Answer:
Scanner
A scanner is an input device that works by optically 'reading' an image or document and converting it into a digital representation, typically a bitmap image file. This allows the digitized content to be viewed, edited, stored, and shared electronically on a computer. A CD-ROM drive (Option A) is a device used to read data from compact discs, primarily for software installation or data access, not for digitizing physical media. A plotter (Option B) is an output device used for printing high-quality vector graphics, often for architectural blueprints or engineering designs, converting digital data to physical output. A barcode reader (Option C) is a specialized input device designed to read and decode barcodes, which are optical machine-readable representations of data, but it does not digitize general images or documents.