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Preguntas del test (36)
1Nonpreemptive processes _____
- ACan be removed from their current processor and improve response times
- BRun until completion or until they yield control of a processor
- CRequires the OS to switch to kernel (admin) mode to manage process execution and then back to process mode
- DNeeds short response time of the OS
2Preemptive processes ____
- ACan be removed from their current processor and improve response times
- BShow the period of time serving requests to fetch information and store in cache until space runs out
- CRun until completion or until they yield control of a processor
- DRequires the OS to switch to kernel (admin) mode to manage process execution and then back to process mode
3Layers of a computer system top to bottom:
- AKernel mode, Hardware, User, User mode
- BHardware, User, User mode, kernel mode
- CHardware, Kernel mode, User mode, User
- DUser, User mode, Kernel mode, Hardware
4What uses the FIFO structure?
- AThe stack
- BContext Switches
- CComputer counter
- DSimultaneous Peripheral Operations On Line (SPOOL)
5Parameters from any procedure are _______ the stack in ______ order
- Apushed onto; chronological
- Bpopped off; chronological
- Cpushed onto; reverse
- Dpopped off; reverse
6The return address for any calling procedure is ______ the stack.
- Apushed onto
- Bpopped off
7When procedures are finished, local variables are _______ the stack.
- Apushed onto
- Bpopped off
8Context Switches:
- ARequire the OS to switch to kernel (admin) mode to manage process execution and then back to process mode
- BStore and restore the state or context of a CPU in the process control block (PCB) so that a process execution can be resumed from the same point at a later time
- CUses a disk as a very large buffer
- DUses first in first out data structure (FIFO)
- EEnable multiple process to share a single CPU
9What is stored on a stack?
- ANetwork cards
- BReturn address
- CSystem libraries
- DMethod parameters
- ELocal variables
10What is NOT stored for the state?
- AProgram counter
- BGraphic processors
- CI/O information
- DScheduling info
- EAll of these are stored on a state
11Context switches are inexpensive
- AVerdadero
- BFalso
12Processes are frequently blocked from execution temporarily by I/O operations with context switches
- AVerdadero
- BFalso
13Provides the user interface to interact with the system
- AInteractivity
- BUsers
- CContext Switches
14What is an example of an input device?
- AProgram counter
- BMonitor
- CFile disk
- DKeyboard
15What is an example of an output device?
- AProgram counter
- BMonitor
- COperating system
16Which of the following is true about Spooling?
- AIt's capable of overlapping I/O operations for one job with processor operations for another job
- BPlaces data of various I/O jobs in a buffer
- CUses a disk as a very large buffer
- DAll of the above
17What requires a short response time of the OS?
- AInteractivity
- BSpooling
- CContext switches
- DThe process control block
18An OS has software that manages _____.
- AProcesses
- BMemory
- CFiles
- DI/O devices
- ENone of these
- FAll of these
19An operating system an abstraction from the hardware of computers to humans
- AVerdadero
- BFalso
20Which of the following is NOT a benefit of virtual machines
- ACan run multiple OSs
- BCost efficient
- CSaves space
- DPortable across machines
- EThey are all benefits
21A virtual machine is an additional software abstraction from an OS to an entire machine
- AVerdadero
- BFalso
22A host is ____.
- Aa user
- Ban administrator
- Can underlying hardware system
- Da hacker
23A guest is _____.
- Aa process provided with virtual copy of the host
- Bthe user
- Ca visitor on the OS
- Da temporary user
24A container abstracts or visualizes both the OS kernel and the hardware
- AVerdadero
- BFalso
25The principle of least privilege dictates that programs, users, and systems be given as many privileges as possible to complete their tasks
- AVerdadero
- BFalso
26The major types of security controls are:
- APhysical
- BLocal
- CAdministrative
- DTechnical
27The sudo command allows a user to perform actions beyond their normal privileges assigned by the access control list
- AVerdadero
- BFalso
28________ is a default-deny approach and _________ is a default-allow approach
- AWhitelisting; Blacklisting
- BBlacklisting; Whitelisting
29________ override _______
- Ablacklists ; whitelists
- Bwhitelists ; blacklists
30Whitelisting:
- ADictates that programs, users, and systems be given just enough privileges to complete their tasks
- BOnly giving administrator-approved programs, and IP and email addresses, system access – all else is assumed unsafe and blocked
- CA list of applications, email addresses, IP addresses, and websites that cannot access your network
- DAllows a user to perform actions beyond their normal privileges assigned by the access control list
31Blacklisting:
- ADictates that programs, users, and systems be given just enough privileges to complete their tasks
- BOnly giving administrator-approved programs, and IP and email addresses, system access – all else is assumed unsafe and blocked
- CA list of applications, email addresses, IP addresses, and websites that cannot access your network
- DAllows a user to perform actions beyond their normal privileges assigned by the access control list
32When a process executes, it passes through different states
- AProcess control block
- BDeadlock
- CBlacklist
- DProcess life cycle
33A data structure maintained by the operating system for every process
- AProcess control block
- BDeadlock
- CProgram counter
- DProcess life cycle
34A thread is a flow of execution through the process code, with its own program counter
- AVerdadero
- BFalso
35Which of the following is a goal of process scheduling?
- AFairness
- BPredictability
- CScalability
- DAll of these
36The conditions necessary for _______ to occur is when two or more jobs are put on hold indefinitely, each waiting for a vital resource to become available
- Ainvestigation
- Bprocess control block
- Cdeadlock
- Dmemory management
Información
- Descripción
- Test sobre OSS study, creado por Autumn Warner el 11/12/2019.
- Autor
- Autumn Warner
- Idioma
- English
- Visitas
- 0
- Valoración
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