825922
Descripción
Test por Amanda Hatch, actualizado hace más de 1 año
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Creado por Amanda Hatch
hace alrededor de 10 años
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Pregunta 1
Pregunta
A _____ is an example of a systems program.
Respuesta
-
text formatter
-
Web browser
-
database system
-
command interpreter
Pregunta 2
Pregunta
____ is a popular commercial application that abstracts Intel 80XXx86 hardware into isolated virtual machines.
Respuesta
-
.NET
-
VMware
-
JVM
-
JIT
Pregunta 3
Pregunta
Java technology is
Respuesta
-
A programming language specification
-
A specification of a virtual machine
-
A virtual machine
-
Both (A) and (C)
Pregunta 4
Pregunta
_____ is not an example of a benefit of virtual machines.
Respuesta
-
Protects the host system from guest operating systems
-
The ability to run several different operating systems that all share the same hardware
-
Uses less physical memory than an actual operating system
-
The ability to concurrently run several different operating systems
Pregunta 5
Pregunta
_____ provide(s) an interface to the services provided by an operating system.
Respuesta
-
Shared memory
-
System calls
-
Communication
-
Simulators
Pregunta 6
Pregunta
_____ is not one of the major categories of system calls.
Respuesta
-
Process control
-
Security
-
Communications
-
Protection
Pregunta 7
Pregunta
______ tricks an application by having it think it is the only process on the system.
Respuesta
-
Simulation
-
The Java virtual machine
-
The .NET framework
-
Paravirtualization
Pregunta 8
Pregunta
_____ allow operating system services to be loaded dynamically.
Respuesta
-
Graphical user interfaces
-
Virtual machines
-
File systems
-
Modules
Pregunta 9
Pregunta
Microkernels use _____ for communication.
Respuesta
-
virtualization
-
system calls
-
message passing
-
shared memory
Pregunta 10
Pregunta
The Windows CreateProcess() system call creates a new process. What is the equivalent system call in UNIX:
Respuesta
-
process()
-
fork()
-
getpid()
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NTCreateProcess()
Pregunta 11
Pregunta
The close() system call in UNIX is used to close a file. What is the equivalent system call in Windows:
Respuesta
-
CloseFile()
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Exit()
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close()
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CloseHandle()
Pregunta 12
Pregunta
If a program terminates abnormally, a dump of memory may be examined by a ____ to determine the cause of the problem.
Respuesta
-
debugger
-
module
-
control card
-
shell
Pregunta 13
Pregunta
Which of the following statements is incorrect?
Respuesta
-
An operating system provides an environment for the execution of programs.
-
Operating systems must provide both protection and security.
-
Operating systems provide both command line as well as graphical user interfaces.
-
An operating system manages system resources.
Pregunta 14
Pregunta
_____ is/are not a technique for passing parameters from an application to a system call
Respuesta
-
Stack
-
Registers
-
Special block in memory
-
Cache memory
Pregunta 15
Pregunta
A message-passing model is ____.
Respuesta
-
only useful for small simple operating systems
-
easier to implement than a shared memory model for intercomputer communication
-
a network protocol, and does not apply to operating systems
-
faster than the shared memory model
Pregunta 16
Pregunta
KDE and GNOME desktops are available under open-source licenses.
Respuesta
- True
- False
Pregunta 17
Pregunta
Many operating system merge I/O devices and files into a combined file because of the similarity of system calls for each.
Respuesta
- True
- False
Pregunta 18
Pregunta
The virtual-machine concept does not offer complete protection of the various system resources.
Respuesta
- True
- False
Pregunta 19
Pregunta
A program written for the .NET Framework need not worry about the specifics of the hardware or the operating system on which it will run.
Respuesta
- True
- False
Pregunta 20
Pregunta
An initial bootstrap program is in the form of random-access memory (RAM)
Respuesta
- True
- False
Pregunta 21
Pregunta
System calls can be run in either user mode or kernel mode.
Respuesta
- True
- False
Pregunta 22
Pregunta
Policy ____
Respuesta
-
is not likely to change over time
-
determines what will be done
-
is not likely to change across places
-
determines how to do something
Pregunta 23
Pregunta
Application programmers typically use an API rather than directory invoking system calls.
Respuesta
- True
- False
Pregunta 24
Pregunta
In general, Windows system calls have longer, more descriptive names and UNIX system calls use shorter, less descriptive names.
Respuesta
- True
- False
Pregunta 25
Pregunta
Some level of hardware support is required to provide virtualization.
Respuesta
- True
- False
Pregunta 26
Pregunta
The JVM may only be implemented in software.
Respuesta
- True
- False
Pregunta 27
Pregunta
The JVM provides the ability to run architecture-neutral programs.
Respuesta
- True
- False
Pregunta 28
Pregunta
The major difficulty in designing a layered operating system approach is ____.
Respuesta
-
making sure that each layer hides certain data structures, hardware, and operations from higher-level layers
-
making sure each layer is easily converted to modules
-
debugging a particular layer
-
appropriately defining the various layers
Pregunta 29
Pregunta
A microkernel is a kernel ____.
Respuesta
-
that is stripped of all nonessential components
-
that is compiled to produce the smallest size possible when stored to disk
-
containing many components that are optimized to reduce resident memory size
-
that is compressed before loading in order to reduce its resident memory size
Pregunta 30
Pregunta
To the SYSGEN program of an operating system, the least useful piece of information is _____.
Respuesta
-
amount of memory available
-
what applications to install
-
operating-system options such as buffer sizes or CPU scheduling algorithms
-
the CPU being used
Pregunta 31
Pregunta
A boot block ____.
Respuesta
-
typically only knows the location and length of the rest of the bootstrap program
-
typically is sophisticated enough to load the operating system and begin its execution
-
is composed of multiple disk blocks
-
is composed of multiple disk cylinders
Pregunta 32
Pregunta
In a virtual machine, each program believes that it has ____.
Respuesta
-
another "virtual" computer to assist in its operations
-
more memory than is physically available on the machine
-
its own memory
-
multiple processors
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