[理工] OS
想請問幾題OS題目 因為手邊沒有解答
想麻煩各位大大們幫忙指正
單選:
第一題:In a paged virtual memory system
(A)threading (B)thrashing (C)signaling (D)stacking
is a condition in which excessive paging operations are taking place.
這題我選B
第二題:In a segmentation virtual memory system ,
(A)internal fragmentation (B)external fragmentation
(C)threading (D)thrashing (E)signaling
occurs if holes left in physical memory when segments are destroyed.
這題我選(B)
第三題:Transport Layer Security(TLS) uses
(A)asymmetric cryptography (B)symmetric cryptography
(C)message authentication codes(MAC)
(D)one-way hash functions (E)bloom filters
for key exchange.
這題我選(B)
第四題:What locking mechanism is better suited for multiprocessor
where threads run for a short period of time?
(A)spinlock (B)mutexes (C)semaphore (D)adaptive mutexes
(E)condition variables
這題我選(A)
第五題:What is the most required hardware support for the synchronization
implementation in an operating system?
(A)data cache (B)instruction cache (C)translation look-ahead buffers
(D)atomic read-modify-write cycle (E)superscalar architecture
這題我選(B)
第六題:In Linux or Windows,a device drivers needing the best performance
should be run in
(A)user mode (B)middleware mode (C)kernal mode(D)application mode
(E)virtual mode
這題我選(C)
第七題:Which of the scheduling approach should be used in a real time
system? (A)first come first serve (B)shortest-job first
(C)Non-preemptive priority (D)Round-Robin (E)Priority-based preemptive
這題我選(E)
第八題:What statemant is wrong?
(A)both threads and processes are execution in an application
(B)Processes are independent execution units that contain their
own address spaces.
(C)A single process can contain multiple threads
(D)all threads within a process can communicate with each other directly
through global variables.
(E)Threads in different processes can communicate with each other
directly through global variables.
這題我選(E)
多選:
第九題:Signals are an inter-process communication mechanism in Unix/LinuX
OS.Signals can be generated by
(A)A user shell command
(B)programs via system calls
(C)the kernel
(D)an interrupt or exception handler
這題我選CD
以上 拜託大家了(跪)
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