Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
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
151
Which of the following statements regarding magnetic disks is incorrect?
Answer:
It provides only sequential access to stored data
Magnetic disks are known for their ability to provide direct or random access to data, which allows the system to jump to any specific location on the disk without reading through preceding data.
152
Which of the following best describes a dot-matrix printer?
Answer:
is an output device
A dot-matrix printer is a type of computer printer that produces characters by striking an ink-soaked ribbon against paper using a series of small pins.
153
What is the full form of the acronym DMA in computing?
Answer:
Direct Memory Access
DMA stands for Direct Memory Access. It is a feature of modern computer systems that allows certain hardware subsystems to access the main system memory independently of the central processing unit, thereby improving overall system performance.
154
Which of the following companies is not primarily known as a manufacturer of hard disk drives?
Answer:
Intel
While Samsung, Seagate, and Western Digital are major manufacturers of storage solutions including hard disk drives and SSDs, Intel is primarily known for manufacturing microprocessors, chipsets, and motherboards rather than mechanical hard disk drives.
155
Which component is responsible for facilitating the interface between the CPU and peripheral devices?
Answer:
parts of computer
The interface between a central processing unit and peripheral devices is managed by various hardware components, including controllers, buses, and interface cards.
156
Which acronym is commonly used to identify optical storage media that allows for data to be written and erased multiple times?
Answer:
RW
The acronym 'RW' stands for 'ReWritable'. It is appended to optical disc formats like CD-RW or DVD-RW to indicate that the disc supports multiple read and write cycles, allowing users to update or delete the data stored on the medium as needed.
157
Which component is responsible for temporarily storing data or information and transferring it as directed by the control unit?
Answer:
Register
Registers are small, high-speed storage locations located directly within the CPU. They hold data, instructions, or memory addresses that the control unit needs to access immediately during the execution of computer programs.
158
Which of the following printer types is classified as a non-impact printer?
Answer:
Laser printer
A laser printer is a non-impact printer because it uses electrostatic charges and toner to transfer images onto paper without physically striking the page.
159
Which of the following devices are commonly used to input data into a computer system?
Answer:
All
Keyboards, mice, and microphones are all examples of input devices. A keyboard allows for text entry, a mouse provides graphical navigation, and a microphone captures audio input, all of which are processed by the computer.
160
What is the standard physical diameter of a Compact Disc (CD)?
Answer:
12 cm
The standard Compact Disc (CD) is designed with a physical diameter of 120 millimeters, which is equivalent to 12 centimeters.