20482950
Descripción
Test por hoffa HOFFMAN, actualizado hace más de 1 año
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Creado por hoffa HOFFMAN
hace más de 4 años
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Pregunta 1
Pregunta
99. Process is
Respuesta
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● A program in execution
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● A job in secondary memory
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● Contents of main memory
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● Program in High level language kept on disk
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● a unit of activity characterized by execution of a sequence of instructions, a current state, and an associated set
Pregunta 2
Pregunta
100. A task in a blocked state
Respuesta
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● is waiting for same temporarily unavailable resources
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● must still be placed in the run queues
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● is executable
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● is running
Pregunta 3
Pregunta
101. The systems which allows only one process execution at a time, are
called
Respuesta
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● unicasting systems
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● uniprogramming systems
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● uniprocessing systems
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● unitasking systems
Pregunta 4
Pregunta
102. The state of a process is defined by:
Respuesta
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● the current activity of the process
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● the activity to next be executed by the process
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● the final activity of the process
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● the activity is just executed by the process
Pregunta 5
Pregunta
103. Which of the following is not the state of a process?
Respuesta
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● ready
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● Old
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● terminated
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● running
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● new
Pregunta 6
Pregunta
104. Suppose that a process is in “Blocked” state waiting for some I/O
service. When the service is completed, it goes to the:
Respuesta
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● Suspended state
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● Terminated state
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● Running state
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● Ready state
Pregunta 7
Pregunta
105. Which of the following state transitions is not possible?
Respuesta
-
● ready to running
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● blocked to ready
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● running to blocked
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● blocked to running
Pregunta 8
Pregunta
106. If a process is executing in its critical section, then no other processes
can be executing in their critical section. This condition is called
Respuesta
-
● synchronous exclusion
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● mutual exclusion
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● asynchronous exclusion
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● critical exclusion
Pregunta 9
Pregunta
107. Interprocess communication:
Respuesta
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● allows processes to communicate and synchronize their actions without using the same address space
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● allows processes to communicate and synchronize their actions when using the same address space
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● allows the processes to only synchronize their actions without communication
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● none of the above
Pregunta 10
Pregunta
08. A sequence of instructions, in a computer language, to get the desired
result, is known as?
Respuesta
-
● program
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● process
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● instruction
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● algorithm
Pregunta 11
Pregunta
109. In operating system, each process has its own:
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● program code
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● set of data
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● address space and global variables
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● all of the mentioned
Pregunta 12
Pregunta
110. For each process OS creates and manages:
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● Thread control block
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● Program
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● Program code
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● Process control block
Pregunta 13
Pregunta
111. Listing the sequence of instructions that are executed is called?
Respuesta
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● control block
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● instruction
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● program counter
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● trace
Pregunta 14
Pregunta
112. A process can be terminated due to:
Respuesta
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● killed by another process
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● all of the mentioned
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● normal exit
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● fatal error
Pregunta 15
Pregunta
113. What is the ready state of a process?
Respuesta
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● when process is unable to run until some task has been completed
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● when process is using CPU
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● none of the above
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● when process is scheduled to run after some execution
Pregunta 16
Pregunta
114. What is interprocess communication?
Respuesta
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● communication within the process
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● none of the above
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● communication between two threads of same process
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● communication between two process
Pregunta 17
Pregunta
115. A set of processes is deadlock if:
Respuesta
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● each process is terminated
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● all processes are trying to kill each other
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● none of the above
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● each process is blocked and will remain so forever
Pregunta 18
Pregunta
116. The address of the next instruction to be executed by the current
process is provided by the:
Respuesta
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● process stack
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● CPU registers
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● program counter
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● pipe
Pregunta 19
Pregunta
117. A Process Control Block (четыре вопроса в одном)PCB) doesn’t contain which of the following:
Respuesta
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● code
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● bootstrap program
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● process state
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● data
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● stack
Pregunta 20
Pregunta
118. The Process Control Block is:
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● secondary storage section
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● block in memory
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● data structure
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● process type variable
Pregunta 21
Pregunta
119. The degree of multi-programming is:
Respuesta
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● the number of processes in memory
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● the number of processes in the ready queue
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● the number of processes in the I/O queue
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● the number of processes executed per unit time
Pregunta 22
Pregunta
120. A single thread of control allows the process to perform:
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● multiple tasks at a time
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● only one task at a time
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● both
Pregunta 23
Pregunta
121. The objective of multi-programming is to:
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● to minimize CPU utilization
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● to maximize CPU utilization
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● have multiple programs waiting in a queue ready to run
Pregunta 24
Pregunta
122. What is a long-term scheduler?
Respuesta
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● it selects which process has to remove from memory by swapping
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● it selects which process has to be brought into the ready queue
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● none of the above
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● it selects which process has to be executed next and allocates CPU
Pregunta 25
Pregunta
123. What is a medium-term scheduler?
Respuesta
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● it selects which process has to remove from memory by swapping
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● it selects which process has to be brought into the ready queue
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● none of the above
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● it selects which process has to be executed next and allocates CPU
Pregunta 26
Pregunta
124. What is a short-term scheduler?
Respuesta
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● it selects which process has to remove from memory by swapping
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● it selects which process has to be brought into the ready queue
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● none of the above
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● it selects which process has to be executed next and allocates CPU
Pregunta 27
Pregunta
125. The primary distinction between the short-term scheduler and the longterm scheduler is:
Respuesta
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● the frequency of their execution
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● the type of processes the schedule
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● none of the above
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● the length of their queues
Pregunta 28
Pregunta
126. In a multi-programming environment:
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● a single user can execute many programs at the same time
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● more than one process resides in the memory
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● the programs are developed by more than one person
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● the processor executes more than one process at a time
Pregunta 29
Pregunta
127. The context of a process in the PCB of a process DOESN’T contain:
Respuesta
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● the value of the CPU registers
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● memory-management information
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● the process state
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● context switch time
Pregunta 30
Pregunta
128. Which of the following state transitions is not possible?
Respuesta
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● ready to running
-
● blocked to ready
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● running to blocked
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● blocked to running
Pregunta 31
Pregunta
129. Which process can be affected by other processes executing in the
system?
Respuesta
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● parent process
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● child process
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● cooperating process
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● init process
Pregunta 32
Pregunta
130. Which one of the following is a synchronization tool?
Respuesta
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● Semaphore
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● pipe
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● thread
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● socket
Pregunta 33
Pregunta
131. Mutual exclusion can be provided by the:
Respuesta
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● binary semaphores
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● both
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● mutex locks
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● none of the abovemaint
Pregunta 34
Pregunta
132. When high priority task is indirectly preempted by medium priority task
effectively inverting the relative priority of the two tasks, the scenario is called:
Respuesta
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● priority modification
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● priority removal
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● priority inversion
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● priority exchange
Pregunta 35
Pregunta
133. With ……………. only one process can execute at a time; meanwhile all
other process are waiting for the processor. With ………….. more than one
process can be running simultaneously each on a different processor.
Respuesta
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● Multiprogramming, Multiprocessing
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Multiprogramming, Uniprocessing
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● Uniprogramming, Multiprocessing
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● Multiprocessing, multiprogramming
Pregunta 36
Pregunta
134. Interprocess communication allows:
Respuesta
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● is required for all processes
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● is usually done via disk drives
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● is never necessary
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● allows process to synchronize activity
Pregunta 37
Pregunta
135. Message passing system allows processes to:
Respuesta
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● communicate with one another by resorting shared data
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● name the recipient or sender of the message
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communicate with one another without resorting to shared data
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● share data
Pregunta 38
Pregunta
136. The link between two processes P and Q to send and receive messages
is called:
Respuesta
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● synchronization link
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● communication link
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● all of the above
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● message-passing link
Pregunta 39
Pregunta
137. In indirect communication between processes P and Q:
Respuesta
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● there is another process R to handle and pass on the messages between P and Q
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● there is another machine between the two processes to help communication
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● none of the above
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● there is a mailbox to help communication between P and Q
Pregunta 40
Pregunta
138. In the non-blocking send:
Respuesta
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● none of the above
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● the sending process keeps sending until it receives a message
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● the sending process keeps sending until the message is received
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● the sending process sends the message and resumes operation
Pregunta 41
Pregunta
139. In the blocking send, blocking receive:
Respuesta
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● the sending process sends the message while receiver is blocked
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● the sending process sends the message and resumes operation
-
● none of the above
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● both sender and receiver are blocked until message is delivered
Pregunta 42
Pregunta
140. In the non-blocking send, blocking receive:
Respuesta
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● none of the above
-
● the sending process keeps sending until it receives a message
-
● sender continues on, receiver is blocked until the requested message arrives
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● the sending process sends the message and resumes operation
Pregunta 43
Pregunta
141. In the non-blocking send, non-blocking receive:
Respuesta
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● the sending process sends the message and resumes operation
-
● the sending process keeps sending until the message is received
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● neither of processes are required to wait
-
● the sending process keeps sending until it receives a message
Pregunta 44
Pregunta
142. Remote Procedure Calls (четыре вопроса в одном)RPC) are used:
Respuesta
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● for communication between two processes remotely different from each other on the same system
-
● for communication between two processes on the same systems
-
● for communication between two processes on separate systems
-
● none of the above
Pregunta 45
Pregunta
143. What is a trap/exception?
Respuesta
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● software generated interrupt caused by an error
-
● hardware generated interrupt caused by an error
-
● failure of the system
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● user generated interrupt caused by an error
Pregunta 46
Pregunta
144. To avoid the race condition, the number of processes that may be
simultaneously inside their critical section is:
Respuesta
-
● 2
-
● 1
-
● 0
-
● 10
Pregunta 47
Pregunta
145. The initial value of the semaphore that allows only one of the many
processes to enter their critical sections, is?
Respuesta
-
● 10
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● 2
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● 0
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● 1
Pregunta 48
Pregunta
146. Semaphores:
Respuesta
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● synchronize critical resources to prevent contention
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● are used to do I/O
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● synchronize critical resources to prevent deadlock
-
● are used for memory management
Pregunta 49
Pregunta
147. Four necessary conditions for deadlock to exist are: mutual exclusion,
no-preemption, circular wait and
Respuesta
-
● starvation
-
● hold and wait
-
● deadlock avoidance
-
● race condition
Pregunta 50
Pregunta
148. Part of a program where the shared memory is accessed and which
should be executed invisibly, is called:
Respuesta
-
● directory
-
● critical section
-
● mutual exclusion
-
● semaphores
Pregunta 51
Pregunta
149. Banker's algorithm for resource allocation deals with:
Respuesta
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● deadlock avoidance
-
● deadlock recovery
-
● mutual exclusion
-
● deadlock prevention
Pregunta 52
Pregunta
150. A situation where several processes access and manipulate the same
data concurrently and the outcome of the execution depends on the particular
order in which access takes place is called:
Respuesta
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● Process synchronization
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● Shared memory segments
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● Race section
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● Entry section
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