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
3431
Which storage type uses magnetic disks to store and retrieve data?
Answer:
Hard disk drive
HDDs store data on spinning magnetic platters read by a moving head.
3432
What can automate factory production lines?
Answer:
Machine tools
Machine tools automate physical manufacturing tasks on production lines.
3433
Which is an example of flash memory?
Answer:
Pen Drive
Flash memory retains data without power and is commonly used in USB drives like pen drives.
3434
Which computer memory is non-volatile and can be electrically erased and reprogrammed?
Answer:
Flash memory
Flash memory retains data without power and is commonly used in USB drives and SSDs.
3435
To make a laptop function as a desktop by connecting it to a monitor and other hardware, which accessory is used?
Answer:
Docking station
A docking station turns a notebook into a desktop by offering connectivity for displays and peripherals.
3436
An operating system?
Answer:
Provides a layered, user-friendly interface
The OS offers an interface to make computer use accessible to users.
3437
What type of memory acts as a high-speed buffer between the memory and CPU for faster processing?
Answer:
Cache memory
Cache memory is a small, very fast memory that sits between the CPU and the main RAM. It stores copies of the data from frequently used main memory locations to reduce the average time to access data from the main memory, thereby speeding up processing.
3438
Which of the following are considered input devices?
Answer:
All of these
Input devices are used to send data to a computer. A keyboard sends text data, a mouse sends positioning and click data, and a card reader sends data from a card (like a memory card or credit card). All three are examples of input devices.
3439
Time during which a job is processed by the computer is called:
Answer:
Execution time
Execution time is the actual time spent processing a task.
3440
What does DMA stand for in microprocessor terminology?
Answer:
Direct Memory Access
DMA stands for Direct Memory Access. It is a feature of computer systems that allows certain hardware subsystems to access main system memory (RAM) independently of the central processing unit (CPU), which improves performance by offloading memory transfer tasks from the CPU.