OS The Linux System
A process is thrashing if ____________
it is spending more time paging than executing
it is spending less time paging than executing
page fault occurs
swapping can not take place
it is spending more time paging than executing
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In the Many to Many models when a thread performs a blocking system call ___________A. other threads are strictly prohibited from running
B. other threads are allowed to run
C. other threads only from other processes are allowed to run
D. none of the mentioned
The first process launched by the linux kernel is ___________
A. init process
B. zombie process
C. batch process
D. boot process
Which of the following page replacement algorithms suffers from Beladyโs Anomaly?
A. Optimal replacement
B. LRU
C. FIFO
D. Both optimal replacement and FIFO
If the memory access time is denoted by โmaโ and โpโ is the probability of a page fault (0 <= p <= 1). Then the effective access time for a demand paged memory is ____________
A. p x ma + (1-p) x page fault time
B. ma + page fault time
C. (1-p) x ma + p x page fault time
D. none of the mentioned
Thread synchronization is required because ___________
A. all threads of a process share the same address space
B. all threads of a process share the same global variables
C. all threads of a process can share the same files
D. all of the mentioned
When a process begins execution with no pages in memory?
A. process execution becomes impossible
B. a page fault occurs for every page brought into memory
C. process causes system crash
D. none of the mentioned
A process can be ___________
A. single threaded
B. multithreaded
C. both single threaded and multithreaded
D. none of the mentioned
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