CSC 415 OPERATING SYSTEMS EXAM NEWEST 2026
ACTUAL EXAM TEST BANK| CSC 415 OPERATING
SYSTEMS EXAM REVIEW WITH COMPLETE 650
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (BRAND NEW!!)
____ I/O accesses a block device as a simple array of blocks.
a. Raw
b. Cooked
c. Stream
d. Indirect - Correct Answer - a. Raw
A(n) ____ is a buffer that holds output for a device that cannot accept
interleaved data streams.
a. cache
b. spool
c. escape
d. block device - Correct Answer - b. spool
A(n) ____ is a front-end processor that multiplexes the traffic from
hundreds of remote terminals into one port on a large computer.
a. network daemon
b. I/O channel
c. terminal concentrator
d. context switch coordinator - Correct Answer - c.terminal concentrator
pg. 1
,Component that measures elapsed time and to trigger operations is
called a
a. programmable interval timer.
b. socket.
c. high performance event timer.
d. network time protocol. - Correct Answer - a. programmable interval
timer.
Technique used to improve I/O efficiency by temporarily storing copies
of data is called
a. caching.
b. spooling.
c. buffering.
d. memory mapping. - Correct Answer - a. caching.
____ is the number of processes that are completed per time unit.
a. Turnaround Time
b. CPU utilization
c. Response Time
d. Throughput - Correct Answer - d. Throughput
____ scheduling is approximated by predicting the next CPU burst with
an exponential average of the measured lengths of previous CPU bursts.
a. SJF
b. FCFS
c. Multilevel queue
pg. 2
,d. RR - Correct Answer - a. SJF
The ____ scheduling algorithm is designed especially for time-sharing
systems.
a. RR
b. FCFS
c. Multilevel queue
d. SJF - Correct Answer - a. RR
____ involves the decision of which kernel thread to schedule onto
which CPU.
a. Dispatcher
b. Process-contention scope
c. Round-robin scheduling
d. System-contention scope - Correct Answer - d. System-contention
scope
____ allows a thread to run on only one processor.
a. Load balancing
b. Processor affinity
c. NUMA
d. Processor Set - Correct Answer - b. Processor affinity
The two general approaches to load balancing are ____ and ____.
pg. 3
, a. soft real-time, hard real-time
b. coarse grained, fine grained
c. soft affinity, hard affinity
d. push migration, pull migration - Correct Answer - d. push migration,
pull migration
With ____ a thread executes on a processor until a long-latency event
(i.e. a memory stall) occurs.
a. virtualization
b. fine-grained multithreading
c. multicore processors
d. coarse-grained multithreading - Correct Answer - d. coarse-grained
multithreading
The rate of a periodic task in a hard real-time system is ____, where p is
a period and t is the processing time.
a. p/t
b. 1/t
c. 1/p
d. pt - Correct Answer - c. 1/p
Which of the following scheduling algorithms gives the minimum
average waiting time for a given set of processes?
a. FCFS
b. Multilevel queue
c. RR
pg. 4
ACTUAL EXAM TEST BANK| CSC 415 OPERATING
SYSTEMS EXAM REVIEW WITH COMPLETE 650
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (BRAND NEW!!)
____ I/O accesses a block device as a simple array of blocks.
a. Raw
b. Cooked
c. Stream
d. Indirect - Correct Answer - a. Raw
A(n) ____ is a buffer that holds output for a device that cannot accept
interleaved data streams.
a. cache
b. spool
c. escape
d. block device - Correct Answer - b. spool
A(n) ____ is a front-end processor that multiplexes the traffic from
hundreds of remote terminals into one port on a large computer.
a. network daemon
b. I/O channel
c. terminal concentrator
d. context switch coordinator - Correct Answer - c.terminal concentrator
pg. 1
,Component that measures elapsed time and to trigger operations is
called a
a. programmable interval timer.
b. socket.
c. high performance event timer.
d. network time protocol. - Correct Answer - a. programmable interval
timer.
Technique used to improve I/O efficiency by temporarily storing copies
of data is called
a. caching.
b. spooling.
c. buffering.
d. memory mapping. - Correct Answer - a. caching.
____ is the number of processes that are completed per time unit.
a. Turnaround Time
b. CPU utilization
c. Response Time
d. Throughput - Correct Answer - d. Throughput
____ scheduling is approximated by predicting the next CPU burst with
an exponential average of the measured lengths of previous CPU bursts.
a. SJF
b. FCFS
c. Multilevel queue
pg. 2
,d. RR - Correct Answer - a. SJF
The ____ scheduling algorithm is designed especially for time-sharing
systems.
a. RR
b. FCFS
c. Multilevel queue
d. SJF - Correct Answer - a. RR
____ involves the decision of which kernel thread to schedule onto
which CPU.
a. Dispatcher
b. Process-contention scope
c. Round-robin scheduling
d. System-contention scope - Correct Answer - d. System-contention
scope
____ allows a thread to run on only one processor.
a. Load balancing
b. Processor affinity
c. NUMA
d. Processor Set - Correct Answer - b. Processor affinity
The two general approaches to load balancing are ____ and ____.
pg. 3
, a. soft real-time, hard real-time
b. coarse grained, fine grained
c. soft affinity, hard affinity
d. push migration, pull migration - Correct Answer - d. push migration,
pull migration
With ____ a thread executes on a processor until a long-latency event
(i.e. a memory stall) occurs.
a. virtualization
b. fine-grained multithreading
c. multicore processors
d. coarse-grained multithreading - Correct Answer - d. coarse-grained
multithreading
The rate of a periodic task in a hard real-time system is ____, where p is
a period and t is the processing time.
a. p/t
b. 1/t
c. 1/p
d. pt - Correct Answer - c. 1/p
Which of the following scheduling algorithms gives the minimum
average waiting time for a given set of processes?
a. FCFS
b. Multilevel queue
c. RR
pg. 4
