CSC 415 Operating Systems All Units \TEST BANK EXAM
2026-2027 RECENT EXAM 2026 ACTUAL COMPLETE
FREQUENTLY MOST TESTED REAL EXAM QUESTIONS AND
VERIFIED SOLUTIONS | GET IT 100% ACCURATE!! ALREADY
GRADED A+ | NEWEST EXAM | JUST RELEASED!!
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.
Select one:
a. status
b. transfer
c. data-in
d. control
d. control
____ I/O accesses a block device as a simple array of blocks.
Select one:
a. Raw
b. Cooked
c. Stream
d. Indirect
a. Raw
,A character-stream device ____.
Select one:
a. is a device such as a disk drive
b.transfers data in blocks of bytes
c.transfers data a byte at a time
d. is similar to a random access device
c.transfers data a byte at a time
Which of the following is true of a blocking system call?
Select one:
a. The application continues to execute its code when the call is issued.
b. Blocking application code is harder to understand than
nonblocking application code
c. The call returns immediately without waiting for the I/O to complete.
d. The execution of the application is suspended when the call is issued.
d.The execution of the application is suspended when the call is issued.
Although caching and buffering are distinct functions, sometimes a region
of memory can be used for both purposes.
Select
one:
True
False
True
,A sense key reports on the failure of a SCSI device by ____.
Select one:
a.giving detailed information about the exact cause of
failure b.stating the general category of failure
c.stating the general nature of the failure
d.maintaining internal pages of error-log
information
c.stating the general nature of the failure
A(n) _ is a buffer that holds output for a device that cannot accept
interleaved
data streams.
Select one:
a. cache
b. spool
c. escape
d. block device
b. spool
On a read operation, the device driver first checks if the data already
available in the buffer cache.
Select
one:
True
False
False
, In modern operating systems, dynamic loading and unloading allows
Select one:
a.adding new I/O devices without recompiling the kernel.
b.updating existing devices drivers without recompiling the
kernel. c.adding new I/O devices after the system has already
been booted.
d. All the other choices
d. All the other choices
In FAT used in MS-DOS,
Select one:
a. None of the other choices
b. a string preceding the colon that identifies the storage device.
c. the storage device is identified in the path name with no clear
separation of the device portion.
d. the mount table stores the identities of all storage devices.
b.a string preceding the colon that identifies the storage device.
Benefit(s) of using STREAMS is (are)
Select one:
a. All the other choices
b. number of modules in STREAMS is constant.
c. a module can be used by more than one
device. d.STREAMS I/O is synchronous.
c.a module can be used by more than one device.
2026-2027 RECENT EXAM 2026 ACTUAL COMPLETE
FREQUENTLY MOST TESTED REAL EXAM QUESTIONS AND
VERIFIED SOLUTIONS | GET IT 100% ACCURATE!! ALREADY
GRADED A+ | NEWEST EXAM | JUST RELEASED!!
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.
Select one:
a. status
b. transfer
c. data-in
d. control
d. control
____ I/O accesses a block device as a simple array of blocks.
Select one:
a. Raw
b. Cooked
c. Stream
d. Indirect
a. Raw
,A character-stream device ____.
Select one:
a. is a device such as a disk drive
b.transfers data in blocks of bytes
c.transfers data a byte at a time
d. is similar to a random access device
c.transfers data a byte at a time
Which of the following is true of a blocking system call?
Select one:
a. The application continues to execute its code when the call is issued.
b. Blocking application code is harder to understand than
nonblocking application code
c. The call returns immediately without waiting for the I/O to complete.
d. The execution of the application is suspended when the call is issued.
d.The execution of the application is suspended when the call is issued.
Although caching and buffering are distinct functions, sometimes a region
of memory can be used for both purposes.
Select
one:
True
False
True
,A sense key reports on the failure of a SCSI device by ____.
Select one:
a.giving detailed information about the exact cause of
failure b.stating the general category of failure
c.stating the general nature of the failure
d.maintaining internal pages of error-log
information
c.stating the general nature of the failure
A(n) _ is a buffer that holds output for a device that cannot accept
interleaved
data streams.
Select one:
a. cache
b. spool
c. escape
d. block device
b. spool
On a read operation, the device driver first checks if the data already
available in the buffer cache.
Select
one:
True
False
False
, In modern operating systems, dynamic loading and unloading allows
Select one:
a.adding new I/O devices without recompiling the kernel.
b.updating existing devices drivers without recompiling the
kernel. c.adding new I/O devices after the system has already
been booted.
d. All the other choices
d. All the other choices
In FAT used in MS-DOS,
Select one:
a. None of the other choices
b. a string preceding the colon that identifies the storage device.
c. the storage device is identified in the path name with no clear
separation of the device portion.
d. the mount table stores the identities of all storage devices.
b.a string preceding the colon that identifies the storage device.
Benefit(s) of using STREAMS is (are)
Select one:
a. All the other choices
b. number of modules in STREAMS is constant.
c. a module can be used by more than one
device. d.STREAMS I/O is synchronous.
c.a module can be used by more than one device.
