OSG202 Rebuild Questions And Answers With Verified Tests
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Course
OSG202
Institution
OSG202
OSG202 Rebuild Questions And Answers With Verified Tests
QN=1 (6836) A CPU may have multiple execution units, so that can carry out multiple instructions in the same time is called:
a. Pipeline
b. Superscalar
c. Multicore
d. None of the other choices ANS B
QN=2 (6843) The four main struct...
OSG202 Rebuild Questions And Answers With
Verified Tests
QN=1 (6836) A CPU may have multiple execution units, so that can carry out multiple instructions in
the same time is called:
a. Pipeline
b. Superscalar
c. Multicore
d. None of the other choices ANS B
QN=2 (6843) The four main structural elements of a computer system are:
a. Processor, Registers, I/O Modules, Main Memory
b. Processor, Registers, Main Memory, System Bus
c. Processor, Main Memory, I/O Modules, System Bus
d. None of the other choices ANS C
QN=3 (6849) Which of the following instructions should be allowed in user mode?
a. Disable all interrupts
b. Read the time-of-day clock
c. Set the time-of-day clock
d. Change the memory map ANS B
QN=4 (6858) As one proceeds down the memory hierarchy(phân cấp bộ nhớ) (from inboard memory
to offline storage), which of the following conditions is correct?
a. Increasing cost per bit
b. Decreasing capacity
c. Increasing access time
d. None of the other choices ANS C
,QN=5 (6863) Information that must be saved prior to the processor transferring control to the
interrupt handler routine includes:
a. PSW
b. PSW and PC
c. PSW and Contents of processor registers
d. None of the other choices ANS B
QN=6 (6871) What is not a main function of an operating system?
a. Provide the users with an extended (virtual) machine
b. Manage the I/O devices
c. Provide user interfaces
d. Support virtual memory ANS C
QN=7 (6883) What is the main characteristic of real-time operating system?
a. Multiple CPU
b. Time-sharing
c. Time is key parameter
d. Many I/O devices ANS C
QN=8 (6898) What is not correct about system calls?
a. A system call allows a user process to assess and execute operating system functions inside the
kernel.
b. User programs use system calls to invoke operating system services
c. In terms of performance, using system calls is better than using procedure calls
d. Every system call involves overhead due to context switch ANS C
QN=9 (6903) Which of the following is a task of process management of OS?
a. Process creation and deletion.
b. Process suspension and resume
,c. Provision of mechanisms for process synchronization, Interprocess communication, Prevent or
avoid deadlock
d. All of the other choices ANS D
QN=10 (6909) A simple structuring model for monolithic system includes:
a. A main program that invokes the requested service procedure
b. A set of service procedures that carry out the system calls
c. A set of utility procedures that help the service procedures
d. All of the other choices ANS D
QN=11 (6925) What is the "sequential processes" concept?
a. There are both many CPU and many PC
b. All process is executed in concurrency
c. No concurrency inside a process; everything happens sequentially
d. None of the other choices ANS C
QN=12 (6941) Which of the following process state transitions is correct, when the external event for
which a process was waiting happens?
a. Running -> Blocked (waiting)
b. Running -> ready
c. Blocked (waiting) -> ready
d. Ready -> running ANS C
QN=13 (6948) How many percent of the CPU time is wasted, when a computer system has enough
room to hold two program and these programs are idle waiting for I/O half the time?
a. 50%
b. 25%
c. 75%
d. None of the other choices ANS B
, QN=14 (6956) How many ways is Thread implemented?
a. 1
b. 2
c. 3
d. None of the other choice ANS C
QN=15 (6963) Critical Region (Section) concept used in interprocess communication is:
a. A part of the program where the shared memory is accessed
b. A part of shared data
c. A part of shared memory
d. None of the other choices ANS A
QN=16 (6969) Which of the following statements is a hardware solution to the critical region
problem?
a. TSL
b. Shared memory
c. Semaphore
d. None of the other choices ANS A
QN=17 (6978) Which of the following is true about Atomic action on semaphores?
a. Checking the value
b. Changing the value
c. Possibly going to sleep
d. All of the other choices ANS D
QN=18 (6987) Which of the following statements is true about hardware solution to the critical
region problem?
a. Disable Interrupts
b. Monitors
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