11786863
Frage 1
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The segment of code in which the process may change common variables, update tables, write into files is known as?
Antworten
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critical section
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mutual exclusion
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non-critical section
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program
Frage 2
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A problem encountered in multitasking when a process is perpetually denied necessary resources is called:
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starvation
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inversion
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aging
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deadlock
Frage 3
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What is the reusable resource:
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that can be used by one process at a time and is not depleted by that use
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that can be used by more than one process at a time
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none of the above
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that can be shared between various threads
Frage 4
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A minimum_______ variables is/are required to be shared between processes to solve the critical section problem?
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three
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two
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one
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four
Frage 5
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For non-sharable resources like a printer, mutual exclusion:
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must exist
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none of the above
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may exist
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must not exist
Frage 6
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Part of a program where the shared memory is accessed and which should be executed invisibly, is called:
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critical section
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semaphores
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directory
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mutual exclusion
Frage 7
Frage
Memory partitioning algorithm that uses binary tree as a data structure is called: (не точно, примеры есть только с ним, если не правильно поменяйте)
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First-fit algorithm
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Buddy system
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Next-fit algorithm
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Best-fit algorithm
Frage 8
Frage
Current allocation of resources to processes where there is no sequence that does not result in deadlock is called: (не точно)
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Alternative state
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Unsafe state
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Ambiguous state
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Safe state
Frage 9
Frage
The context of a process in the PCB of a process DOESN’T contain:
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memory- management information
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the value of the CPU registers
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the process state
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context switch time
Frage 10
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The link between two processes P and Q to send and receive messages is called:
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communication link
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message-passing link
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synchronization link
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all of the above
Frage 11
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When free memory is split into many unconnected pieces we call it: (не точно)
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compaction
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external fragmentation
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memory distribution
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internal fragmentation
Frage 12
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To avoid the race condition, the number of processes that may be simultaneously inside their critical section is:
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0
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1
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10
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2
Frage 13
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What thread approach does Java runtime environment use?
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Multiple processes, multiple threads per process
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One process, one thread
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One process, multiple threads
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multiple processes, single thread per process
Frage 14
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The primary distinction between the short-term scheduler and the long-term scheduler is:
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The frequency of their execution
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None of the above
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The length of their queues
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The type of processes they schedule
Frage 15
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Paging:
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allows multiple programs to reside in separate areas of core at the time
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consists of those addresses that may be generated by a processor execution of a computation
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is a method of allocating process time
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is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks
Frage 16
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Which of the replacement algorithms selects for replacement that page for which the time to the next reference is the longest?
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optimal
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Clock
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LRU
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FIFO
Frage 17
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Which of the replacement algorithms treats the page frames allocated to a process as a circular buffer?
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optimal
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Clock
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LRU
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FIFO
Frage 18
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Virtual memory takes advantage of: (не точно)
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Fast CPU
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Large secondary memory
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Scheduling
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Modular programming
Frage 19
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The size of virtual storage is limited by…
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the number of processors in a system
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the actual number of main storage locations
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the addressing scheme of the computer system and by the amount of secondary memory
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the amount of main memory and secondary memory
Frage 20
Frage
What is trashing?
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Guessing, based on recent history, which pieces are least likely to be used in the near future
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Assumption that only a few pieces of a process will be needed over a short period of time
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Condition when the system spends most of its time swapping pieces rather than executing instructions
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Saving time by swapping unused pieces of process out of the memory
Frage 21
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What is the real address?
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physical address in cache memory
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virtual address in main memory
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virtual address in secondary memory
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physical address in main memory
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