With reference to the computers, which of the following statements are…
2024
With reference to the computers, which of the following statements are correct?
A. CPU follows fetch-decode-execute-store cycle to run instructions.
B. Intel and AMD are two manufacturers of CPUs
C. The clock speed of a CPU is usually measured in Megabytes
D. Fans are required to cool down most CPUs so that they do not overheat
E. CPU is the brain of the computers and modern CPUs cannot have multiple processing cores.
Choose the correct answer from the options given below:
Answer: D. A, B and D Only — ConceptA CPU is described along three independent axes, and each axis carries its own vocabulary. Instruction handling: every machine instruction is driven…
- A.
A, B, C and D Only
- B.
A and B Only
- C.
C and D Only
- D.
A, B and D Only
Show answer & explanation
Correct answer: D
Concept
A CPU is described along three independent axes, and each axis carries its own vocabulary. Instruction handling: every machine instruction is driven through one fixed cycle — fetch it from memory, decode it in the control unit, execute it in the ALU, and store (write back) the result. Physical operation: a CPU is clocked, and a clock rate is a frequency, so it is expressed in hertz and its multiples (MHz, GHz), while bytes and their multiples (KB, MB, GB) express a quantity of data. Architecture: a single CPU package may hold one or several independent processing cores.
So a statement of this kind is settled by two general tests. The unit test: a rate must be quoted in a rate unit, never in a storage unit. The capability test: a claim that denies a capability must be measured against what current hardware actually provides. A third rule governs compound sentences — a sentence built from several clauses is true only when every clause in it is true.
Application
Statement | What it asserts | Assessment |
|---|---|---|
A | Instructions are run through fetch, decode, execute and store. | This is the standard instruction cycle: the control unit fetches the instruction from memory, decodes it, the ALU executes it, and the result is written back. The statement holds. |
B | Intel and AMD are two manufacturers of CPUs. | Both are long-established makers of x86 processors shipped in desktops, laptops and servers. The statement holds. |
C | The clock speed of a CPU is usually measured in Megabytes. | Clock speed counts cycles per second, so its unit is the hertz — in practice MHz or GHz. A megabyte measures how much data is stored or moved, not how fast the clock ticks, so this mixes a storage unit into a rate. The statement fails the unit test. |
D | Fans are required to cool down most CPUs so that they do not overheat. | The switching power a CPU draws leaves it as heat, so mainstream desktop and laptop CPUs are paired with a heatsink and fan to stay inside their thermal limit. The statement holds. |
E | The CPU is the brain of the computer, and modern CPUs cannot have multiple processing cores. | The first clause is the usual description of a CPU, but multi-core processors — dual-core, quad-core and higher — have been the norm since the mid-2000s. The second clause fails the capability test, and the compound statement fails with it. |
Cross-check
Collecting the statements that survive both tests gives the set A, B and D. Reading that set back against the offered combinations: a combination that carries C imports the megabyte-for-hertz unit error, and a combination that drops D loses a statement that holds. Only the set A, B and D matches on both counts.
The correct combination is therefore A, B and D Only. Statement E is the useful reminder here: a compound sentence collapses as soon as one of its clauses is false, however familiar the other clause sounds.