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
3441
Which video card is best suited for 3D gaming?
Answer:
ATI Radeon 9700 Pro
The ATI Radeon 9700 Pro is highly regarded for high-end 3D gaming performance.
3442
For connecting many computers over a wide geographic area, which medium is efficient?
Answer:
All of the above
Various media including satellites, twisted pair, and coaxial cables are used for wide area networking.
3443
Execution of multiple programs by a single CPU is?
Answer:
Multiprogramming
Multiprogramming allows one CPU to run multiple programs by managing CPU time efficiently.
3444
A remote control that is used to turn a machine on or off is also called a:
Answer:
Interface
An interface is a method of interacting with and controlling external devices or software systems.
3445
Which unit measures dot-matrix printer speed?
Answer:
cps
Characters per second (cps) measures the output rate of impact printers.
3446
What kind of protection can you apply to a floppy disk?
Answer:
Write protection
Floppy disks can be protected by enabling write protection to prevent overwriting.
3447
What is the binary equivalent of (64)10?
Answer:
1000000
Decimal 64 is represented in binary as 1000000.
3448
Typical data transfer rates in LANs are?
Answer:
Mega bits per second
LANs generally offer transfer rates in the order of megabits per second (Mbps).
3449
Which memory allows simultaneous read and write operations?
Answer:
RAM
RAM supports both reading and writing data simultaneously.
3450
Which specific component within the CPU acts as a temporary buffer for data moving between the processor and main memory during read or write operations?
Answer:
Instruction Register (IR)
The Memory Data Register (MDR), also known as the Memory Buffer Register (MBR), is a vital CPU register that temporarily holds data being transferred between the CPU and main memory. When the CPU reads data from memory, this data is first loaded into the MDR. Similarly, when the CPU writes data to memory, the data is held in the MDR before being stored in its designated memory location. Let's examine why the other options are incorrect: * **Option A: Memory Address Register (MAR)** is responsible for storing the memory address of the data or instruction that the CPU wants to access or write to, not the data itself. * **Option B: Instruction Register (IR)** holds the instruction fetched from memory that is currently being decoded and executed by the CPU. While an instruction is a form of data, the IR's purpose is specific to instructions post-fetch and prior to execution, whereas the MDR handles all data transfers with memory. * **Option D: Program Counter (PC)** stores the memory address of the next instruction to be fetched from memory, dictating the flow of program execution. It does not store data being transferred.