Deck 15: Linux Operating Systems

Question 1

To keep track of free and busy pages,Linux uses a system of page tables.

Answer 1

True

Question 2

Linux has system calls that change the size of the process data segment,either by expanding it to accommodate extra data values or reducing it when certain values positioned at the end of the data segment are no longer needed.

Answer 2

True

Question 3

Virtual memory is implemented in Linux through demand paging.

Answer 3

True

Question 4

When Linux allocates memory space,by default it allocates one GB of high-order memory to the kernel and three GB of memory to executing processes.

Question 5

Device drivers supervise the transmission of data between main memory and the local unit.

Question 6

Linux brought much of the speed,efficiency,and flexibility of UNIX to small desktop computers.

Question 7

The secure log file contains lists of all attempts to log in to the system,including the date,time,and duration of each access attempt.

Question 8

Anyone is permitted to copy and distribute verbatim copies of the operating system,including those who want to customize it for release to the public.

Question 9

Filenames are not case sensitive in Linux.

Question 10

Linux is an open-source program.

Question 11

A page's middle directory contains a pointer to the actual page frame.

Question 12

Virtual memory in Linux is managed using a multiple-level table hierarchy.

Question 13

Linux was developed by Dennis Ritchie,who wanted to create an operating system to maximize the limited capabilities of the Intel 80386 microprocessor.

Question 14

When a process requests pages,Linux loads them into memory.When the kernel needs the memory space,the pages are released using a most recently used (MRU)algorithm.

Question 15

All Linux files are organized in directories that are connected to each other in a tree-like structure.

Question 16

In the Linux scheduler,processes with the SCHED_OTHER type have the highest priority.

Question 17

A path name can be either one name or a list of names separated by dashes.

Question 18

In Linux,each process is referenced by a descriptor,which contains approximately fifteen fields describing the process attributes together with the information needed to manage the process.

Question 19

The name Linux is a contraction of Linus and UNIX.

Question 20

Linux offers memory protection based on the type of information stored in each region belonging to the address space of a user request.

Question 21

The ____ device used in Linux memory management can be a partition on the disk or it can be a normal file.

A) pointer
B) swap
C) page
D) database

Question 22

The Linux page replacement algorithm is an expanded version of the ____ replacement policy.

A) clock page
B) clock
C) page clock
D) page

Question 23

In Linux,up to a total of 256MB of usable memory can be configured into equal-sized page frames,which can be grouped to give more contiguous space to a job.These groups can also be split to accommodate smaller jobs.The process of grouping and splitting usable memory is known as the ____.

A) process algorithm
B) grouping algorithm
C) buddy algorithm
D) group/split algorithm

Question 24

Linux updates are issued free to the public about every ____ months.

A) two
B) four
C) six
D) eight

Question 25

Linux provides ____ queues and semaphores to allow two processes to synchronize with each other.

A) exec
B) fork
C) wait
D) pause

Question 26

Linux provides the foundation for the ____ operating system.

A) Snow Leopard
B) Android
C) Vista
D) Solaris

Question 27

In Linux,the ____ log file stores messages of which systems have successfully started up and shut down,as well as any that have failed to do so.

A) boot.log
B) dmesg
C) auth.log
D) secure

Question 28

Administrators use ____ logs that provide a detailed description of activity on the system.

A) file
B) directory
C) detailed
D) system

Question 29

When a process begins execution,its segments have a ____ size.

A) large
B) variable
C) small
D) fixed

Question 30

In Linux,____ devices cannot host a file system.

A) write
B) read
C) block
D) char

Question 31

Linux provides semaphores to help solve the problems of mutual exclusion and of producers and consumers.The Linux semaphore structure contains ____ fields.

A) two
B) three
C) four
D) five

Question 32

Which of the following is a popular distribution of Linux?

A) Lion
B) Ubuntu
C) Xcode
D) Ugull

Question 33

Under Linux filename conventions,the ____ represents the root directory.

A) \
B) ..
C) ^
D) /

Question 34

A file containing data or programs belonging to users is known as a(n)____.

A) symbolic link
B) ordinary file
C) special file
D) named pipe

Question 35

The three standard classes of devices supported by Linux are ____.

A) character devices,system devices,and network interfaces
B) system devices,block devices,and network interfaces
C) character devices,block devices,and network interfaces
D) character devices,block devices,and network devices

Question 36

____ management is designed to replace or change parts of the operating system that need to be enhanced or replaced.

A) OS
B) Patch
C) VFS
D) Kernel

Question 37

Linux terminal management conforms to ____ standards,and it also supports pseudo-terminals.

A) POSIX
B) SCSI
C) USB
D) DLL

Question 38

Because Linux is written and distributed under the ____ General Public License,its source code is freely distributed and available to the general public.

A) GPL
B) Open Publication
C) GNU
D) MPP

Question 39

In Linux,the three levels of file access are ____,____,and ____.

A) owner;domain;group
B) owner;group;administrator
C) administrator;owner others
D) owner;group;others

Question 40

In Linux device management,the ____ device number is used as an index to the array to access the appropriate code for a specific device driver.

A) major
B) minor
C) unique
D) support