QUESTION 1

Which one of followings is NOT a component of OS?

Hard drive

File system

Process control

Memory management

Kernel

QUESTION 2

Run script1 with command: bash script1 root

The output is:

User's name does not match

User's name must be specified

Start running ...

Not safe to run script1 as root

QUESTION 3

Operating system is:

hardware

software

hybrid of hardware and software

QUESTION 4

Application programs are loaded before the OS kernel during the booting process

False

True

QUESTION 5

Remove directory 'test' by running command: rm -rf test, then run command: bash script2 7

What files are in directory 'test'?

Directory 'test does not exist

afile0.txt

afile1.txt afile3.txt afile5.txt afile7.txt

afile0.txt afile1.txt afile2.txt afile3.txt afile4.txt afile5.txt afile6.txt

QUESTION 6

Support the following files are in the current working directory: abc.txt, abcd.txt, bcd.txt, amm.doc, ammc.txt. What is the return result after executing command 'ls a??.*'

abc.txt

abcd.txt

amm.doc

ammc.txt

abc.txt

abcd.txt

ammc.txt

abc.txt

amm.doc

bcd.txt

QUESTION 7

Run script with command: bash script1 $(whoami)

The output is:

User's name must be specified

Start running ...

User's name does not match

Not safe to run script1 as root

QUESTION 8

In Windows, if you wanted to adjust the programs that run during system startup, what utility would you employ?

msconfig

ipconfig

ping

chkdsk

QUESTION 9

In OS, shell is a graphical user interface

True

False

QUESTION 10

In Windows, what command would you employ to see your network configuration?

msconfig

nslookup

ping 0.0.0.1

ipconfig /all

QUESTION 11

OS with monolithic architecture involves heavy overhead in the system call.

False

True

QUESTION 12

How to list contents of the current working directories in Linux?

find

ls

show

echo

QUESTION 13

What does the following command mean 'ls -l | more' ?

Execute 'ls -l' and 'more' commands in sequence.

Redirect the output of 'more' command to the input of the 'ls -l' command.

Execute 'ls -l' and 'more' command in parallel.

Tells the shell to connect the standard output of 'ls -l' to the standard input of 'more' by an inter-process communication mechanism called an anonymous pipe/

QUESTION 14

Remove both directories 'release' and 'test' by running command: rm -rf release test

Then run command: bash script2 2

What files are in directory 'release'? What files are in directory 'test'

Directories 'release' and 'test' do not exist

test: afile0.txt afile1.txt; release: afile0.txt

test: afile0.txt release: afile0.txt afile1.txt

test: afile0.txt afile1.txt; release: afile0.txt afile1.txt

QUESTION 15

The non-volatile storage media include:

Optical disk

Flash memory

Hard disk

Tape

QUESTION 16

If an item in the list result has permission attribute like '-rwxr-xr-x', what does it mean?

The owner of the file can read and execute only, the group can read and execute, others can read and execute.

The owner of the file can read and write only, the group can read and execute, others can read and execute.

The owner of the directory can read, write, the group can read and execute, others can read and execute.

The owner of the file can read, write and execute, the group can read and execute, others can read and execute.

QUESTION 17

Function of OS include:

Resource management

Execute and provide services for applications

Standardization of user interface

QUESTION 18

Run script2 with command: bash script2 $(whoami)

The output is:

err: number of files must be specified

err: input must be a number

Start running ...

err: number can not be larger than 45

QUESTION 19

Suppose a file 'test.txt' has the following lines as its content:

Hello World

What is going to be its content after executing the following two commands:

echo "Introduction to Linux" > test.txt

echo "Hello Linux" >> test.txt

Introduction to Linux; Hello Linux

Hello World; Hello Linux

Hello World; Introduction to Linux; Hello Linux

Hello Linux

QUESTION 20

How to rename a file from 'a.txt' to 'b.txt' in Linux?

rename a.txt b.txt

cp -r a.txt b.txt

cp a.txt b.txt

mv a.txt b.txt

QUESTION 21

Run script2 with command: bash script2 25

The output is:

err: input must be a number

err: number can not be larger than $maxn

Start running ...

err: number can not be larger than 20

QUESTION 22

Run script2 with command: bash script2 7

The output is:

Start running ...

err: number can not be larger than $maxn

err: number of files must be specified

system error: cannot creat dir test

QUESTION 23

OS that is implemented with microkernels can suffer from increased system-function overhead

False

True

QUESTION 24

What is RAID?

Redundant array of independent disks

A set of virtual disks

A set of storage simulators controlled by software

Software implementation of virtual disks

QUESTION 25

Run script2 with command: bash script2

The output is:

err: number of files must be specified

err: number can not be larger than $maxn

User's name must be specified

err: input must be a number

QUESTION 26

In Windows, how to open a command prompt window?

press ctrl-alt-F1

press Shift-F1

press Win+R on your keyboard to open it. Then, type cmd or cmd.exe and press Enter

press ctrl-alt-delete

QUESTION 27

Executable files have special format, which may include:

Header

Data and code

Symbol table

Static link

QUESTION 28

What Windows user interface can show you the programs that are currently active?

Event Viewer

Task Manager

Control Panel

Performance Monitor

QUESTION 29

Suppose the home directory for a user is '/home/usera', and the current working directory is '/home/usera/document/work'. What is the current working directory after executing command 'cd ~/..'

/home/usera/document

/home/usera/document/work

/home/usera

/home

QUESTION 30

Which Windows user interface contains a group of configuration utilities?

Performance Monitor

Event Viewer

Control Panel

Task Manager

QUESTION 31

For an item 'atarget' with permission attribute '-rwxr-xr-x', how to change it to: read/write by the owner, read/execute by the group, execute by others?

chmod 754 atarget

chmod 641 atarget

chmod 651 atarget

chmod 741 atarget

QUESTION 32

What is the different between command "ls -l" and "ls -la"?

"ls -la" list detailed information about files and directories include whose names begin with a dot.

"ls -la" lists detailed information about files and directories, while "ls -l" only shows file names.

"ls -la" only shows files but not sub-directories.

"ls -l" only lists names of sub-directories .

QUESTION 33

Which of the following is the root directory under Linux file system and what is the correct command to go to the root directory?

The root dir is "/", and the command to go to the root dir is "goto /"

The root dir is "/", and the command to go to the root dir is "cd /"

The root dir is "/root", and the command to go to the root dir is "cd ~"

The root dir is "/root", and the command to go to the root dir is "cd /root"

QUESTION 34

A library can be linked to an executable file through:

Hyper-thread link

Static link

Dynamic link

Bottom-up link

QUESTION 35

For a file system, operations of file include:

Creating a file

Reading a file

Writing a file

Appending a file

QUESTION 36

Communication inside of of monolithic kernel is through message passing

True

False

QUESTION 37

Remove directory 'release' by running command: rm -rf release, then run command: bash script2 5

What files are in directory 'release'?

afile0.txt afile2.txt afile4.txt

afile1.txt afile3.txt afile5.txt

There are no files in directory 'release'

Directory 'release' does not exist

QUESTION 38

Command line user interface is not as efficient as the graphical user interface. Therefore, system administrators always prefer GUI

False

True

QUESTION 39

Running script1 using command: bash script1

The output is:

User's name must be specified

Not safe to run script1 as root

User's name does not match

Cannot find the command

QUESTION 40

A program requests a service from an operating system's kernel through:

System call

I/O operations

User interface

Interrupt

The script is below

cis2332fall2015/0000755000175200010010000000000012606620526011615 5ustar xwuNonecis2332fall2015/release/0000755000175200010010000000000012606621466013241 5ustar xwuNonecis2332fall2015/src/0000755000175200010010000000000012606621655012410 5ustar xwuNonecis2332fall2015/src/script10000751000175200010010000000040712606557741013724 0ustar xwuNone#!/usr/bin/bash

usrname=$(whoami)

if [ -z $1 ]; then echo "User's name must be specified" elif [ $1 = 'root' ]; then echo "Not safe to run $0 as root" elif [ $1 != $usrname ]; then echo "User's name does not match" else echo 'Start running ...' fi

cis2332fall2015/src/script20000751000175200010010000000272412606621601013714 0ustar xwuNone#!/usr/bin/bash

if [ $1 = 'clean' ]; then if [ -d ../test ]; then $(rm -rf ../test/*) fi if [ -d ../release ]; then $(rm -rf ../release/*) fi exit fi

re='^[0-9]+$' re4file='^[a-z]+([0-9]+)\.[a-z]+' maxn=20 fstr='afile'

if [ -z $1 ]; then echo "err: number of files must be specified" exit 1 elif ! [[ $1 =~ $re ]]; then echo "err: input must be a number" exit 1 elif [ $1 -gt $maxn ]; then echo "err: number can not be larger than $maxn" exit 1 else echo 'Start running ...' fi

if ! [ -d ../test ]; then echo 'creat test dir' $(mkdir ../test) if [ $? -ne 0 ]; then echo 'system error: cannot creat dir test' exit 1 fi else $(rm -rf ../test/*) fi

for (( cnt=0; cnt<$1; cnt++ )); do fname="$fstr$cnt.txt" $(touch ../test/$fname) if [ $? -ne 0 ]; then echo "system error: cannot create file $fname" fi done

if ! [ -d ../release ]; then echo 'creat release dir' $(mkdir ../release) if [ $? -ne 0 ]; then echo 'system error: cannot creat dir release' exit 1 fi else $(rm -rf ../release/*) fi

allfiles=($(ls ../test)) for afile in ${allfiles[@]}; do if [[ $afile =~ $re4file ]]; then filenum=$(echo ${BASH_REMATCH[1]}) if [ $(echo $filenum % 2 | bc) -eq 0 ]; then $(cp ../test/$afile ../release) if [ $? -ne 0 ]; then echo "system error: cannot cp $afile to dir release" exit 1 fi fi fi done

cis2332fall2015/test/0000755000175200010010000000000012606621466012600 5ustar xwuNone