Operating Systems for Programmers - Module 4 - Pre-Quiz

Question 1

The surface of a magnetic disk platter is divided into ____.

Accepted Answer

tracks

Answer

sectors

Answer

arms

Answer

cylinders

Question 2

An interrupt priority scheme can be used to ____.

Accepted Answer

all of the above

Answer

allow the most urgent work to be finished first

Answer

make it possible for high-priority interrupts to preempt the execution of a low priority interrupt

Answer

defer the handling of a low-priority interrupt without masking off all interrupts

Question 3

A sense key reports on the failure of a SCSI device by ____.

Accepted Answer

stating the general nature of the failure

Answer

stating the general category of failure

Answer

giving detailed information about the exact cause of failure

Answer

maintaining internal pages of error-log information

Question 4

Transfers between memory and disk are performed a ____.

Accepted Answer

block at a time

Answer

byte at a time

Answer

file at a time

Answer

sector at a time

Question 5

A character-stream device ____.

Accepted Answer

transfers data a byte at a time

Answer

transfers data in blocks of bytes

Answer

is a device such as a disk drive

Answer

is similar to a random access device

Question 6

Which of the following is true of a blocking system call?

Accepted Answer

The execution of the application is suspended when the call is issued.

Answer

The application continues to execute its code when the call is issued.

Answer

The call returns immediately without waiting for the I/O to complete.

Answer

Blocking application code is harder to understand than non-blocking application code.

Question 7

The ____ register of an I/O port can be written by the host to start a command or to change the mode of a device.

Accepted Answer

control

Answer

status

Answer

data-in

Answer

transfer

Question 8

The simplest file access method is ____.

Accepted Answer

sequential access

Answer

logical access

Answer

relative access

Answer

direct access

Question 9

Which of the following disk head scheduling algorithms does not take into account the current position of the disk head?

Accepted Answer

FCFS

Answer

SSTF

Answer

SCAN

Answer

LOOK

Question 10

Which of the following is a key property of an immutable file?

Accepted Answer

The file name may not be reused.

Answer

The contents of the file may be altered.

Answer

It is difficult to implement in a distributed system.

Answer

The file name may be reused.

Operating Systems for Programmers - Module 4 - Pre-Quiz

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