Deck 2: X86 Processor Architecture Assessment

Question 1

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

Answer 1

True

Question 2

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

Answer 2

False

Question 3

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

Answer 3

True

Question 4

The upper half of the RDX register is called EDX.

Question 5

Requests from hardware devices are called interrrupts.

Question 6

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

Question 7

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

Question 8

Another name for machine cycle is clock cycle.

Question 9

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

Question 10

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

Question 11

The lower half of the RCX register is called EBX.

Question 12

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

Question 13

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

Question 14

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

Question 15

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