Quiz 5 - I/O and Basic OS

Question 1

What type of IO allows the CPU to trigger an IO action and then go on to some other work?

Answer 1

Interrupt-driven IO

Question 2

What are the categories for ?External Devices

Answer 2

Human Readable
Communication
Machine Readable

Question 3

What are the techniques used for IO operations?

Answer 3

Programmed IO
Interrupt-driven IO
Direct Memory Access

Question 4

What

Question 5

What is the definition of the IO command “Control”?

Answer 5

Used to activate a peripheral and tell it what to do.

Question 6

What is the definition of the IO command “Test”?

Answer 6

Used to test various status conditions associated with an I/O module and its peripherals

Question 7

What is the definition of the IO command “Read”?

Answer 7

Causes the I/O module to obtain an item of data from the peripheral and place it in an internal buffer.

Question 8

What is the definition of the IO command “Write”?

Answer 8

Causes the I/O module to take an item of data from the data bus and subsequently transmit that data item to the peripheral.

Question 9

What is the IRA?

Answer 9

International Reference Alphabet

Question 10

In IRA, how many bits are used to represent a single character?

Answer 10

7

Question 11

Which hardware features below are desirable from the OS Standpoint?

Answer 11

Privileged Instructions
Timer
Memory Protection
Interrupts

Question 12

What is Long-Term Scheduling?

Answer 12

Add to the pool of processes to be executed

Question 13

What are the states below that are represented in the Five-State Process Model?

Answer 13

Blocked
Running
Exit
Ready

Question 14

What is Short-Term Scheduling?

Answer 14

Which process will be executed

Question 15

In which register will the result of the following instruction be left: and rax, rbx

Answer 15

rax

Question 16

How many bits can be placed into EAX?

Answer 16

32

Question 17

Logical operations like and and or are performed on the data by what increment?

Answer 17

bit-by-bit

Question 18

What are the two portions of AX?

Answer 18

AH, AL

Question 19

What is the difference between imul and mul?

Answer 19

imul is signed, mul is unsigned

Question 20

inc/dec has the same effect as what other operation?

Answer 20

add/sub 1

Question 21

How many bits can be placed in AH?

Answer 21

8

Question 22

In which register will the result of the following instruction be left: imul rax, rbx, 42

Answer 22

RAX

Question 23

How many bits can be placed in AX?

Answer 23

16

Question 24

When using imul with a big result (64 bits), which register(s) will hold the results of the operation?

Answer 24

RDX and RAX