Quiz
OS Part 2 4
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Perguntas do quiz (25)
1The concept of codes of operation (user mode, system mode) was introduced with
- ATime-sharing-system
- BSimple batch system
- CMultiprogrammed batch system
- DSerial processing
2Short-term scheduler, or dispatcher, picks a process. Each process in the queue is given some time in turn. This strategy is called:
- ARound-robin technique
- BPrioritizing
- CCarousel technique
- DMerry-go-round technique
3Central idea in this system was the use of piece of software known as the monitor:
- ATime-sharing-system
- BSimple batch system
- CMultiprogrammed batch system
- DSerial processing
4'More than one program attempts to make use of a shared resource at the same time'. This is
- AFailed mutual exclusion
- BImproper synchronization
- CDeadlocks
- DNondeterminate program operation
5The term was first used by the designers of Multics in 1960s:
- AMonitor
- BProcess
- CMultiprogramming
- DTime sharing
6Utilities are
- AApplication program
- BSystem programs
- COpcodes
- DProcessor registers
7"When program shares memory and their execution is interleaved by the processor, they may interfere with each other by overwriting common memory areas in unpredictable ways. The result of a particular program depend on the activities of other programs in shared systems".
This is:- AFalled mutual exclusions
- BDeadlocks
- CNondeterminate program operation
- DImproper synchronisation
8The state of a processor is defined by:
- Athe activity just executed by the process
- Bthe current activity of the process
- Cthe final activity of the process
- Dthe activity to next be executed by the process
9The hardware and software used in providing applications to a user can be viewed in:
- Aclassified fashion
- Blayered fashion
- Csandwich fashion
- Dleveled fashion
10Suppose that a process is in "Blocked" state waiting for some I/O device.
When the service is completed, it goes to the:- ASuspended state
- BTerminated state
- CReady state
- DRunning state
11We have
Ts = average (system) access time
T1 = access time of M1 (cache)
T2 = access time of M2 (main memory)
T3 = access time of M3 (disk)
H1 = hit ratio, fraction of time reference is found i M1
H2 = hit ratio, fraction of time reference is found i M2
The average time to access an item, in case the item in cache is:- ATs = H1*T1 + H2*T2 + (1-H2)*T3
- BTs = H1*T1 + (1-H1)*(H1*T1 + H2*(T1 + T2) + (1 - H2)*(T2 + T3))
- CTs = H1*T1
- DTs = H1*T1 + (1-H1)*(H2*(T1 + T2) + (1 - H2)*(T1 + T2 + T3))
12The serial processing presented two main problems:
- Asetup time
- Busing a monitor
- Ctime slicing
- Dmultiprogramming
- Escheduling
13The process index register:
- Acontains the index into a process list of the process currently controlling the processor
- Bdefine the region in memory occupied by the process
- Cpoints to the next instruction in that process to be executed
- Dcontains the starting address of the region of memory occupied by the process
14The concept of a batch operating system was developed to
- AMaximize processor utilization
- BMinimize response time
- CSupport interactive mode
- DMinimize processor utilization
15Batch operating system were used
- AFrom the late 1940s to the mid-1950s
- BFrom the mid-1950 to early 1960s
- CIn early 1960s
16"More than one programs hung up waiting for each other".
This is- AFailed mutual exclusions
- BDeadlocks
- CNondeterminate program operation
- DImproper synchronization
17This contains the most frequently used functions in the OS:
- ACentre
- BBase
- CRoot
- DKernel
18The end user views a computer system in terms of:
- Aa set of machine instructions
- Butilities
- Ca set of system programs
- Da set of applications
19Which of the following is not the state of a process?
- Anew
- Bwaiting
- Cterminated
- Dready
- Erunning
- Fold
20The fetched instruction is loaded into the
- AIR
- BAccumulator
- CMemory
- DPC
21When the time required for the I/O operation will take much more time than executing a sequence of user instructions, it is:
- ASlow I/O wait
- BLong I/O wait
- CFast I/O wait
- DShort I/O wait
22The system handles multiple interactive jobs
- ATime-sharing-system
- BSimple batch system
- CSerial processing
- DMultiprogrammed batch system
23A system clock generates interrupts at a rate of approximately one every 0.2 seconds. At each clock interrupt, the OS regained control and could assign the processor to another user. This technique is known as
- ATime scheduling
- BTime sliding
- CTime slicing
- DTime allocating
24Choose the storage management responsibility for "Programmers should be able to define programs modules, and to create, destroy, and alter the size of modules dynamically":
- AProtection and access control
- BLong-term storage
- Cautomatic allocation and management
- Dprocess isolation
- Esupport of modular programming
25'Lost signals, duplicate signals received'. This is
- AImproper synchronization
- BNondeterminate program operation
- CDeadlocks
- DFailed mutual exclusion
Informações
- Descrição
- Quiz sobre OS Part 2 4, criado por Bekinston Talgio em 03-07-2019.
- Autor
- Bekinston Talgio
- Idioma
- English
- Visualizações
- 1
- Etiquetas
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