x86-64 is also known as: MCQ with Answer and Explanation

x86-64 is also known as:

A. AMD64 or Intel 64

B. ARM64

C. MIPS64

D. RISC-V

Answer: Option A

It is the 64-bit extension of x86.

This question belongs to: Computer CPU (Central Processing Unit)

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Question #1 Report Error

Which register is used to store the result of comparison operations?

A. MAR

B. Flag Register

C. Accumulator

D. Program Counter

Correct Answer: Option B

Explanation:
Flags indicate results such as zero, carry, overflow.

This question belongs to: Computer CPU (Central Processing Unit)

Question #2 Report Error

CPUID instruction is used to:

A. Identify processor features and capabilities

B. Control display

C. Access hard disk

D. Perform addition

Correct Answer: Option A

Explanation:
Software uses it to detect supported features.

This question belongs to: Computer CPU (Central Processing Unit)

Question #3 Report Error

The reorder buffer enables:

A. In-order execution only

B. Reduced registers

C. In-order commit with out-of-order execution

D. No speculation

Correct Answer: Option C

Explanation:
It maintains program order.

This question belongs to: Computer CPU (Central Processing Unit)