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OS | Quizzes #3 and #4

Beschreibung

Suicidal Operating Systems [Teachers: Teshebayeva Karagoz, Mishina Aigerim ; Final Exam + STATE EXAM] ▼ Quiz am OS | Quizzes #3 and #4, erstellt von Good Guy Beket am 28/03/2019.
Good Guy Beket
Quiz von Good Guy Beket, aktualisiert more than 1 year ago
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Zusammenfassung der Ressource

Frage 1

Frage
Utilities are:
Antworten
  • Processor registers
  • Application programs
  • Opcodes
  • System programs

Frage 2

Frage
The process index register
Antworten
  • Contains the index into the process list of process currently controlling the processor.
  • Contains the staring address of the region of memory occupied by the process.
  • Define the region in memory occupied by the process
  • Points to the next isntruction in that process to be executed

Frage 3

Frage
The end user views a computer system in terms of:
Antworten
  • A set of machine instructions
  • A set of applications
  • A set of system programs
  • Utilities

Frage 4

Frage
Choose the storage management responsibility for «The OS can achieve efficiency by assigning memory to jobs only as needed:
Antworten
  • Process isolation
  • Protection and access control
  • Automatic allocation and management
  • Long-term storage
  • Support of modular programming

Frage 5

Frage
"The OS as a User/Computer Interface" corresponds to the following objective:
Antworten
  • Efficiency
  • Convenience
  • Ability to evolve

Frage 6

Frage
_____ is generally faster than _____
Antworten
  • first fit, best fit
  • none of the above
  • best fit, first fit
  • worst fit, best fit

Frage 7

Frage
Memory partitioning algorithm that uses binary tree as a data structure is called:
Antworten
  • First-fit algorithm
  • Buddy system
  • Next-fit algorithm
  • Best-fit algorithm

Frage 8

Frage
The address of a page table in memory is pointed by:
Antworten
  • stack pointer
  • page table base register
  • program counter
  • page register

Frage 9

Frage
Which of the following is not true about the memory management?
Antworten
  • segmented memory can be paged
  • virtual memory is used only in multi-user systems
  • segmentation suffers from external fragmentation
  • paging suffers from internal fragmentation

Frage 10

Frage
Main memory is broken into fixed-size blocks called
Antworten
  • None of the above
  • Segments
  • Frames
  • Pages

Frage 11

Frage
In operating system each process has its own:
Antworten
  • address space and global variables
  • set of data
  • program code
  • all of mentioned

Frage 12

Frage
Mutual exclusion can be provided by the:
Antworten
  • both
  • mutex locks
  • binary semaphores
  • none of the above

Frage 13

Frage
What is a medium-term scheduler?
Antworten
  • It selects which process has to be executed next and allocates CPU
  • It selects which process has to be brought into the ready queue
  • It selects which process to remove from memory by swapping
  • None of the above

Frage 14

Frage
The state of a process is defined by:
Antworten
  • The activity to next to be executed by the process
  • The activity just executed by the process
  • The current activity of the process
  • The final activity of the process

Frage 15

Frage
What is a ready state of a process?
Antworten
  • when process is using the CPU
  • when process is scheduled to run after some execution
  • when process is unable to run unitl some task has been completed
  • none of the above

Frage 16

Frage
Which one of the following is the deadlock avoidance algorithm?
Antworten
  • round-robin algorithm
  • elevator algorithm
  • banker's algorithm
  • dinning philosophers problem

Frage 17

Frage
A state is safe if:
Antworten
  • the system can allocate resources to each process in some order and still avoid a deadlock
  • all of the above
  • the state keeps the system protected and safe
  • the system does not crash due to deadlock occurrence

Frage 18

Frage
The initial value of the semaphore, that allows only one of the many processes to enter their critical sections, is:
Antworten
  • 2
  • 1
  • 0
  • 10

Frage 19

Frage
The segment of code in which the process may change common variables, update tables, write into files is known as:
Antworten
  • critical section
  • mutual exclusion
  • non-critical section
  • program

Frage 20

Frage
A problem encountered in multitasking when a process is perpetually denied necessary resources is called
Antworten
  • starvation
  • aging
  • inversion
  • deadlock

Frage 21

Frage
A system is in the safe state if:
Antworten
  • none of the above
  • there exist a safe sequence
  • both A and B
  • the system can allocate resources to each process in some order and still avoid a deadlock

Frage 22

Frage
What is the reusable resource?
Antworten
  • that can be used by one process at a time and is not depleted by that use
  • that can be used by more than one process at a time
  • that can be shared between various threads
  • none of the above

Frage 23

Frage
This illustrates the progress of two processes competing for two resources
Antworten
  • joint progress diagram
  • joint ingres diagram.
  • joint regress diagram.
  • joint process diagram.

Frage 24

Frage
Current allocation of resources to processes where there is at least one sequence that does not result in deadlock is called
Antworten
  • Safe state
  • Ambiguous state
  • Unsafe state
  • Alternative state

Frage 25

Frage
The resource vector defines:
Antworten
  • total amount of each resource in the system
  • total amount of each resource NOT allocated to any process
  • total amount of resources required for all processes
  • total amount of each resource allocated to all processes

Frage 26

Frage
"No preemption" condition for deadlock is defined as
Antworten
  • No resource can be forcibly removed from process holding it.
  • Process holds a resources while awaiting for other resource
  • Only one process may use a resource at a time
  • Each process holds resource needed by next process in chain

Frage 27

Frage
This matrix defines the current allocation to process i of resource j:
Antworten
  • Claim matrix
  • Allocation matrix
  • Resource matrix
  • Request matrix

Frage 28

Frage
Which of the following cannot be interrupted?
Antworten
  • Process
  • Thread
  • Atomic operation
  • Module

Frage 29

Frage
A minimum of ____ variables is/are required to be shared between processes to solve critical section problem.
Antworten
  • three
  • two
  • one
  • four

Frage 30

Frage
For non-sharable resources like a printer, mutual exclusion:
Antworten
  • must exist
  • may exist
  • must not exist
  • none of the above

Frage 31

Frage
A monitor is type of:
Antworten
  • high-level synchronization construct
  • deadlock
  • low-level synchronization construct
  • none of the above

Frage 32

Frage
An un-interruptible unit is known as:
Antworten
  • atomic.
  • single
  • static
  • none of the above

Frage 33

Frage
Part of program, where the shared memory is accessed and which should be executed invisibly, is called:
Antworten
  • critical section
  • semaphores
  • directory
  • mutual exclusion

Frage 34

Frage
Current allocation of resources to processes where there is no sequence that does not result in deadlock is called:
Antworten
  • Safe state
  • Unsafe state
  • Alternative state
  • Ambiguous state

Frage 35

Frage
Which of the following is not one of the principles of dealing with deadlock?
Antworten
  • Initialization
  • Detection
  • Prevention
  • Avoidance

Frage 36

Frage
Deadlock inevitable region can be referred to as a:
Antworten
  • fatal region
  • false region
  • final region
  • fun region

Frage 37

Frage
When each process in the set is blocked awaiting for resource seized by another blocked process:
Antworten
  • it is deadlock
  • it is deadend
  • it is a softlock
  • It is a mortallock

Frage 38

Frage
What is NOT an example of reusable resource?
Antworten
  • I/O channels
  • Semaphores
  • Processors
  • Interrupt

Frage 39

Frage
In the non-blocking send, blocking receive:
Antworten
  • the sending process sends the message and resumes operation
  • the sending process keeps sending until it receives a message
  • sender continues on, receiver is blocked until the requested message arrives
  • none of the above

Frage 40

Frage
The degree of multi-programming is:
Antworten
  • the number of process in memory
  • the number of processes executed per unit time
  • the number of process in the ready queue
  • the number of process in the I/O queue

Frage 41

Frage
What controls the process in a single-threaded process model?
Antworten
  • Process control block
  • Kernel stack control block
  • User address space control block
  • User stack control block

Frage 42

Frage
The context of a process in the PCB of a process DOESN'T contain:
Antworten
  • memory-management information
  • context switch time
  • the process state
  • the value of CPU registers

Frage 43

Frage
Job control language was used to:
Antworten
  • provide instructions to the monitor to improve job setup time.
  • control the sequence of events as the resident monitor
  • translate the user's program into object code
  • execute instructions

Frage 44

Frage
The hardware and software used in providing applications to a user can be viewed in a:
Antworten
  • sandwich fashion
  • classified fashion
  • layered fashion
  • leveled fashion

Frage 45

Frage
Semaphore is a/an _____ to solve critical section problem.
Antworten
  • integer variable
  • special program for a system
  • complex structure
  • hardware for a system

Frage 46

Frage
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
Antworten
  • data consistency
  • aging
  • race condition
  • starvation

Frage 47

Frage
«The OS as a resource manager» corresponds to the following objective:
Antworten
  • Efficiency
  • Convenience
  • Ability to evolve

Frage 48

Frage
Choose the storage management responsibility for «Programmers should be able to define program modules and to create, destroy and after the size of modules dynamically»:
Antworten
  • long-term storage
  • automatic allocation and management
  • support of modular programming
  • process isolation

Frage 49

Frage
The first fit, best fit and worst fit are strategies to select a:
Antworten
  • free hole from a set of available holes.
  • processor to run the next process
  • process from a queue to put in memory
  • all of the above

Frage 50

Frage
For every process there is a:
Antworten
  • page table.
  • copy of page table
  • frame table
  • pointer to page table

Frage 51

Frage
The memory allocation scheme subject to "internal" fragmentation is
Antworten
  • fixed partitioning.
  • virtual memory segmentation
  • pure demand paging
  • segmentation

Frage 52

Frage
In memory systems, boundary registers
Antworten
  • are used for temporary program variable storage
  • are only necessary with fixed partitions
  • are only necessary with unequal-length partitions
  • track the beginning and ending of programs

Frage 53

Frage
Any program, no matter how small, will occupy an entire partition results in
Antworten
  • paging
  • internal fragmentation
  • segmentation
  • external fragmentation

Frage 54

Frage
The Process Control Block is:
Antworten
  • a secondary storage section
  • process type variable
  • data structure
  • a block in memory

Frage 55

Frage
Which one of the following is synchronization tool?
Antworten
  • socket
  • thread
  • pipe
  • semaphore

Frage 56

Frage
The link between two processes P and Q to send and receive messages is called:
Antworten
  • communication link
  • message-passing link
  • synchronization tool
  • all of the above

Frage 57

Frage
This system handles multiple interactive jobs:
Antworten
  • Serial procesing
  • Simple batch system
  • Time-sharing system
  • Multiprogrammed batch system

Frage 58

Frage
"Two or more programs hung up waiting for each other". This error is caused by
Antworten
  • Improper synchronization
  • Nondeterminate program operation
  • Deadlocks
  • Failed mutual exclusion

Frage 59

Frage
"Lost signals, duplicate signals received". This error is caused by:
Antworten
  • improper synchronization
  • nondeterminate program operation
  • failed mutual exclusion
  • deadlocks

Frage 60

Frage
The principal tool available to system programmers in developing the early multiprogramming and multiuser interactive systems
Antworten
  • Interrupt
  • Job Control Language
  • Ad hoc Method
  • Monitor

Frage 61

Frage
Fixed-length block of data in secondary memory is called:
Antworten
  • frames
  • segments
  • pages
  • none of the above

Frage 62

Frage
When the free memory is split into many unconnected pieces we call it:
Antworten
  • Compaction
  • External fragmentation
  • Memory distribution
  • Internal fragmentation

Frage 63

Frage
If a page number is not found in the TLB, then it is known as a:
Antworten
  • TLB miss
  • page fault
  • buffer miss
  • TLB hit

Frage 64

Frage
With paging there is no ______ fragmentation.
Antworten
  • either type of
  • internal
  • external
  • none of the above

Frage 65

Frage
If a page table entry is not in a main memory, then it is known as a:
Antworten
  • TLB hit
  • TLB miss
  • buffer miss
  • page fault

Frage 66

Frage
This matrix defines the amount of resources of type j requested by process i:
Antworten
  • Request matrix
  • Resource matrix
  • Claim matrix
  • Allocation matrix

Frage 67

Frage
«Hold and wait» condition for deadlock is defined as:
Antworten
  • process holds a resource while awaiting for other resource.
  • no resource can be forcibly removed from process holding it
  • only one process may use a resource at a time
  • each process holds resource needed by next process in chain

Frage 68

Frage
«Circular wait» condition for deadlock is defined as:
Antworten
  • each process holds a resource needed by next process in chain.
  • no resource can be forcibly removed from process holding it
  • only one process may use a resource at a time
  • process holds a resource while awaiting for other resource

Frage 69

Frage
Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and _____
Antworten
  • hold and wait
  • deadlock avoidance
  • race around condition
  • buffer overflow
  • none of the above

Frage 70

Frage
This resource can safely be used by only one process at a time and is not depleted by that use:
Antworten
  • refreshing resource
  • replenishing resource
  • refurbished resource
  • reusable resource

Frage 71

Frage
The available vector defines:
Antworten
  • total amount of resources required for all processes
  • total amount of each resource allocated to all processes
  • total amount of each resource NOT allocated to any process
  • total amount of each resource in the system

Frage 72

Frage
"No preemption" condition for deadlock is defined as:
Antworten
  • No resource can be forcibly removed from process holding it.
  • Only one process may use a resource at a time
  • Process holds a resource while awaiting for other resource
  • Each process holds resource needed by next process in chain

Frage 73

Frage
For sharable resources, mutual exclusion
Antworten
  • is not required
  • is required
  • may be or may not be required
  • none of the mentioned

Frage 74

Frage
In the blocking send, blocking receive:
Antworten
  • both sender and receiver are blocked until message is delivered
  • none of the above
  • the sending process sends the message and resumes operation
  • the sending process sends the message while receiver is blocked

Frage 75

Frage
In the non-blocking send, non-blocking receive:
Antworten
  • sender continues on, receiver is blocked until the requested message arrives.
  • neither of processes are required to wait
  • the sending process keeps sending until the message is received
  • the sending process sends the message and resumes operation

Frage 76

Frage
"More than one attempts to make use of a shared resource at the same time". This error is caused by:
Antworten
  • failed mutual exclusion
  • improper synchronization
  • deadlocks
  • nondeterminate program operation

Frage 77

Frage
Which of the following state transitions is not possible?
Antworten
  • Blocked to running
  • Blocked to ready
  • Running to blocked
  • Ready to running

Frage 78

Frage
What is a short-term scheduler?
Antworten
  • It selects which process has to be executed next and allocates CPU
  • It selects which process has to be brought into the ready queue
  • It selects which process to remove from memory by swapping
  • None of these

Frage 79

Frage
What is a long-term scheduler?
Antworten
  • It selects which process has to be brought into the ready queue
  • It selects which process has to be executed next and allocates CPU
  • It selects which process to remove from memory by swapping
  • None of these

Frage 80

Frage
What is inter-process communication?
Antworten
  • Communication between two threads of same process.
  • Communication between two process
  • Communication within the process
  • None of the mentioned

Frage 81

Frage
There were no OS with
Antworten
  • Serial processing
  • Simple batch systems
  • Time sharing systems
  • Multiprogrammed batch systems

Frage 82

Frage
Inter-process communication
Antworten
  • allows processes to communicate and synchronize their actions without using the same address space
  • none of the above
  • allows the processes to only synchronize their actions without communication
  • allows processes to communicate and synchronize their actions when using the same address space

Frage 83

Frage
A sequence of instructions in a computer language to get the desired result is known as:
Antworten
  • algorithm
  • process
  • instruction
  • program

Frage 84

Frage
In contiguous memory allocation
Antworten
  • each process is contained in a single contiguous section of memory
  • none of the above
  • the memory space is contiguous
  • all processes is contained in a single contiguous section of memory

Frage 85

Frage
A system clock generates an interrupts at a rate of approximately every 0.2 seconds. At each clock interrupt regained control and could assign processor to another user. Technique is known as:
Antworten
  • Time scheduling
  • Time slicing
  • Time sliding
  • Time allocating

Frage 86

Frage
In internal fragmentation, memory is internal to a partition and
Antworten
  • is not being used
  • none of the above
  • is always used
  • is being used

Frage 87

Frage
The operating system maintains a ____ table that keeps track of how many frames have been allocated, how many are there and how many are available
Antworten
  • memory
  • page
  • frame
  • segment

Frage 88

Frage
The algorithm is slow and may even tend to fill up memory with useless holes
Antworten
  • Best fit
  • Worst fit
  • First fit
  • None of the above

Frage 89

Frage
24. Which of the following statements is false?
Antworten
  • I\O transfers are more efficient with large pages
  • a large page size causes instructions and data that will not be referenced brought into primary storage
  • a small page size causes large page tables
  • internal fragmentation is increased with small pages

Frage 90

Frage
Short-term scheduler, or dispatcher, picks a process. Each process in the queue is given some time in turn. The strategy is called
Antworten
  • Round-robin technique
  • Prioritizing
  • Carousel technique
  • Merry-go-round technique

Frage 91

Frage
The limit register:
Antworten
  • Defines the size of the region of (in bytes or words)
  • Contains the index into the process list of the process currently controlling the processor
  • Points to the next instruction in that process to be executed
  • Contains the staring address of the region of memory occupied by the process

Frage 92

Frage
Dispatcher is:
Antworten
  • Small program which switches the processor from one process to another
  • Trace scheduler
  • Interrupt handler
  • User account manager

Frage 93

Frage
Process spawning is:
Antworten
  • Creation of parent process
  • Creation of child process
  • Termination of parent process
  • Termination of child process

Frage 94

Frage
The code that changes the value of the semaphore is:
Antworten
  • remainder section code
  • non – critical section code
  • critical section code
  • none of the mentioned

Frage 95

Frage
This resource can be created and destroyed
Antworten
  • consumable resource
  • finite resource
  • restartable resource
  • resumable resource

Frage 96

Frage
What is NOT an example of consumable resource?
Antworten
  • Information in I/O buffers.
  • Signals
  • Main memory
  • Messages

Frage 97

Frage
A binary semaphore is a semaphore with integer values (multiple choices):
Antworten
  • 1
  • —1
  • 0
  • 0.5

Frage 98

Frage
If more than one user or program attempts to make use of a shared resource at the same time, it may cause the error of
Antworten
  • Deadlocks
  • Failed mutual exclusion
  • Nondeterminate program operation
  • Improper synchronization

Frage 99

Frage
Mutual exclusion means that
Antworten
  • if a process is executing in its critical section, then no other process must be executing in their critical sections
  • if a process is executing in its critical section, then all the resources of the system must be blocked until it finishes exclusion
  • if a process is executing in its critical section, then other processes must be executing in their critical section
  • none of the above

Frage 100

Frage
The two kinds of semaphores are:
Antworten
  • mutex
  • counting
  • binary
  • decimal

Frage 101

Frage
The objective of multi-programming is to:
Antworten
  • have multiple programs waiting in a queue ready to run
  • to maximize CPU utilization
  • to minimize CPU utilization

Frage 102

Frage
A relationship between processes such that each has some part (critical section) which must not be executed while the critical section or another
Antworten
  • Mutual exclusion
  • Multiprogramming
  • Semaphore
  • Multitasking

Frage 103

Frage
What 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? It is a method of allocating processor time?
Antworten
  • Paging
  • Virtual memory
  • Partition
  • Segmentation
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