OSG202 Complete Questions And Answers With Verified Study Solutions
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Course
OSG202
Institution
OSG202
OSG202 Complete Questions And Answers With Verified Study Solutions
1 (2299) Which of the following statements is incorrect about user mode and kernel mode?
a. In kernel mode, the OS can execute every instruction in the instruction set
b. In user mode, user program can execute only a subset of i...
OSG202 Complete Questions And Answers With
Verified Study Solutions
1 (2299) Which of the following statements is incorrect about user mode and kernel mode?
a. In kernel mode, the OS can execute every instruction in the instruction set
b. In user mode, user program can execute only a subset of instructions
c. Having two modes of operation helps prevent user programs from accessing critical instructions
d. None of the above ANS None of the above
2 (2302) Random Access memory:
a. Is typically faster than cache memory
b. Is volatile
c. Can only be read sequentially
d. Stores all the files on the computer ANS Is volatile
3 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 above ANS Processor, Main Memory, I/O Modules, System Bus
Which is the difference between personal computers and mainframe computers?
Select one:
a. All of the other choices
b. Protection is much more important on mainframe computers
c. Mainframe computers are mostly batch systems with many users
d. Personal computers are always interactive ANS All of the other choices
,The interface between the operating system kernel and the user programs is defined by the set of
________ that the operating system provides
Select one:
a. Functions
b. Threads
c. Processes
d. System calls ANS System calls
A well-known operating system for sensor node is
Select one:
a. Personal Operating System
b. TinyOS
c. MS-DOS
d. e-COS ANS TinyOS
What are the main motivations of memory management?
Select one:
a. Maximize memory utilization
b. None of the other choices
c. Increase system performance of computer system and maximize memory utilization
d. Increase system performance of computer system ANS Increase system performance of
computer system and maximize memory utilization
Which of the following statement is a task of main memory management of OS?
Select one:
a. Keep track of which parts of memory are currently being used and by whom.
b. Decide which processes to load when memory space becomes available.
c. All of the other choices
d. Allocate and deallocate memory space as needed ANS All of the other choices
,A CPU may have two or more complete processors, so that can carry out multiple threads in the same
time is called:
Select one:
a. Superscalar
b. Multicore
c. None of the other choices
d. Pipeline ANS Multicore
Which of following is true about main memory in the memory hierarchy?
Select one:
a. Gigabytes of slow cheap memory
b. Small amount of fast expensive memory
c. None of the other choices
d. Some medium-speed medium price ANS Some medium-speed medium price
The language of the CPU is known as its
Select one:
a. Instruction set
b. Register set
c. None of the other choices
d. Control unit set ANS Instruction set
Which of the following instructions should be allowed only in kernel mode?
Select one:
a. Disable all interrupts
b. All of the other choices
c. Set the time-of-day clock
d. Change the memory map ANS Set the time-of-day clock
, As one proceeds down the memory hierarchy (from inboard memory to offline storage), the
following conditions apply:
Select one:
a. Increasing capacity
b. Decreasing cost per bit
c. All of the other choices
d. Increasing access time ANS All of the other choices
Which of the following actions generates an external interrupt?
Select one:
a. An input/output operation is completed.
b. A page that does not exist in the main memory is accessed by the virtual storage management.
c. A system call instruction is executed.
d. Division by zero occurs ANS An input/output operation is completed.
What is not a main function of an operating system?
Select one:
a. Manage the I/O devices
b. Support virtual memory
c. Support virtual memory
d. Provide the users with an extended (virtual) machine
e. Provide user interfaces ANS Provide the users with an extended (virtual) machine
What is the main characteristic of Sensor Node operating system?
Select one:
a. Time is key parameter
b. Is usually event driven, responding to external event
c. Time-sharing
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