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Exam 2: X86 Processor Architecture Assessment

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Question 1

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The Zero flag is clear when the result of an arithmetic operation is zero.

A) True
B) False

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Question 2

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In Real-address mode,multiple programs can run at the same time,but they can only address physical memory.

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B) False

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Data travels along a bus with n bits running in parallel,where the bus is n bits wide.

When running in 64-bit mode,only the lowest 48 bits of address operands are used.

The control unit (CU)coordinates the sequencing of steps involved in executing machine instructions.

When running in native 64-bit mode,processors do not support 16-bit Real Mode.

Requests from hardware devices are called "interrrupts".

The upper half of the RDX register is called EDX.

The Basic Input-Output System is a collection of low-level subroutines that communicate directly with hardware devices.

The lower half of the RCX register is called EBX.

Another name for "machine cycle" is clock cycle.

The MMX register names are just different names for registers in the floating-point unit.

The arithmetic logic unit performs addition,subtraction,multiplication,and division operations.

In 64-bit mode,you can use three more general-purpose registers than in 32-bit mode.

The Carry flag reflects the status of an usigned arithmetic operation.