تجدون بالمرفقات الاختبار الثاني ووضعت رابط لموقع به معظم اجابات الاختبار بالتوفيق للجميع
Question 1
1. What is the impact of thrashing?
It improves system performance
It implies excessive page I/O
It decreases the degree of multiprogramming
It reduces page I/O
0.1 points
Question 2
1. Dirty bit is used to show
Page with corrupted data
Page that is modified after being loaded in the cache memory
Wrong page in memory
page that is less frequently accessed
0.1 points
Question 3
1. Which is not true about the memory management?
virtual memory is used in multi-user system
segmentation suffers from external fragmentation
paging suffers from internal fragmentation
segmented memory can be paged
0.1 points
Question 4
- Virtual file system support
Standalone file system
Multiple file system type
Network file system
None of the mentioned
0.1 points
Question 5
1. Virtual Memory is commonly implemented by __________.
Segmentation
Swapping
Demand Paging
None of the above
0.1 points
Question 6
1. Virtual memory can be implemented with
Segmentation
Paging
None of the above
Both of the above
0.1 points
Question 7
1. Thrashing
is a natural consequences of virtual memory system
can always be avoided by swapping
can be caused by poor paging algorithms
always occurs on large computers
0.1 points
Question 8
1. Page fault frequency in an operating system is reduced when the
processes tend to the I/O-bound
size of pages is reduced
processes tend to be CPU-bound
locality of reference is applicable to the process
0.1 points
Question 9
1. Size of virtual memory depends on
size of data bus
size of address bus
size of main memory
none of above
0.1 points
Question 10
1. The mechanism that bring a page into memory only when it is needed is called _____________
Segmentation
Demand Paging
Fragmentation
Page Replacement
0.1 points
Question 11
1. If hardware does not support _________ then a multi - user and multi - processing operating system cannot be implemented.
At least two modes of CPU execution
Demand paging
DMA for disk transfer
Address translation
0.1 points
Question 12
a) Store data
Improved read/write performance
Allocate memory
None of the mentioned
0.1 points
Question 13
1. Paging is implemented in
Operating System
Hardware
Software
All of them
0.1 points
Question 14
1. Run time mapping from virtual to physical address is done by:
memory management unit
CPU
PCI
none of the mentioned
0.1 points
Question 15
1. Which one of the following is the address generated by CPU?
physical address
absolute address
logical address
none of the mentioned
online Quiz 2
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