Deck 5: Advanced File Processing

Question 1

You can use the vi editor to create script files.

Answer 1

True

Question 2

____ is NOT a selection command.

A)comm
B)diff
C)grep
D)sed

Answer 2

D

Question 3

The ____ redirects the output of one command to the input of another command.

A)output redirection operator (>)
B)input redirection operator (<)
C)pipe operator (|)
D)tilde (~)

Answer 3

C

Question 4

The ____ option of the diff command does not compare for blank lines.

A)-b
B)-B
C)-c
D)-C

Question 5

The ____ option of the grep command displays only lines that do not contain the search pattern.

A)-v
B)-n
C)-o
D)-r

Question 6

The ____ option of the diff command is used to display the differences side-by-side in columns.

A)-s
B)-c
C)-n
D)-y

Question 7

You can use the less command with a directory to view its contents one screen at a time,such as less -sbin.

Question 8

The pipe operator can connect several commands on the same command line.

Question 9

You can use the < operator to redirect a command's output from the screen to a file.

Question 10

The ____ option of the diff command shows lines surrounding the line that differs.

A)-d
B)-D
C)-c
D)-C

Question 11

To append new lines in sed,you must use the ____ command

A)a\
B)-a
C)\a
D)>a

Question 12

The ____ command removes duplicate lines from a file.

A)grep
B)dup
C)uniq
D)diff

Question 13

A popular use of pr is to convert lowercase characters to uppercase characters.

Question 14

The ____ option of the diff command ignores blanks that repeat.

A)-b
B)-B
C)-c
D)-C

Question 15

The ____ command locates identical lines within two identically sorted files.

A)diff
B)sed
C)uniq
D)comm

Question 16

When using wc,you cannot specify all three options (-l,-w and -c)in the command line at the same time.

Question 17

By default,pr formats the specified files into single-column pages of ____ lines.

A)22
B)33
C)55
D)66

Question 18

The ____ option of the uniq command instructs it to generate as output only the lines of the source file that are not duplicated successively.

A)-d
B)-s
C)-o
D)-u

Question 19

____ is a selection command.

A)uniq
B)awk
C)sort
D)sed

Question 20

You use the ____ command to search for a specified pattern in a file,such as a particular word or phrase.

A)find
B)grep
C)sed
D)diff

Question 21

A shell script should contain not only the commands to execute,but also ____________________ to identify and explain the shell script so that users or programmers other than the script's author can understand how it works.

Question 22

The ____ function within the awk command is used to format output.

A)out
B)outln
C)print
D)printf

Question 23

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
compares and selects differences in two files

Question 24

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
compares sorted files and shows differences

Question 25

When using the printf function,____ indicates that the output is to appear in decimal digits.

A)%i
B)-i
C)%d
D)-d

Question 26

The sed editor is sometimes called a(n)____________________ editor because input to sed is rendered in standard output (to display on the screen).

Question 27

____________________ commands focus on extracting specific information from files,such as using the comm command to compare file contents.

Question 28

You use the ____ character in script files to mark comments.

A)tilde (~)
B)dollar ($)
C)pipe (|)
D)pound (#)

Question 29

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
counts characters,words,or lines in a file

Question 30

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
formats and prints

Question 31

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
sorts and merges multiple files

Question 32

By default,each page in the output of pr has a ____-line header,which,by default,contains the current file's name,its last modification date,the current page,and a trailer consisting of blank lines.

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

Question 33

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
edits data streams

Question 34

____ is a full-featured programming language.

A)Sed
B)Awk
C)Emacs
D)Grep

Question 35

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
selects lines or rows

Question 36

The first task in the record design phase is to define the ____________________ in the records.

Question 37

Bash is a freeware derivative of the Bourne and ____ shells.

A)Korn
B)C
C)csh
D)tsh

Question 38

____________________ and transformation commands alter and transform extracted information into useful and appealing formats.

Question 39

When you create a shell script to run in Bash,you can immediately run the script by typing ____ and then the name of the script.

A)run
B)sh
C)start
D)exec

Question 40

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
selects columns (fields)

Question 41

Match each command with a statement below.
a.pr
f.diff
b.sed
g.sort
c.comm
h.tr
d.grep
i.wc
e.cut
translates and deletes character by character

Question 42

In some cases,when you use grep,it is helpful to enter the character pattern you are trying to find in single or double quotes.Why?

Question 43

What is the pr command used for?

Question 44

What is a record layout?

Question 45

What will happen if you execute the following command?
ls -l -sbin | more

Question 46

What is the wc command used for?

Question 47

When you write a script,it is advisable to specify with what shell the script is intended to be used.How can you do this?

Question 48

Indicate one advantage to using the Bash shell (instead of the Bourne shell)to run a shell script.

Question 49

What is the diff command used for?

Question 50

What is tr used for?

Question 51

What is the sed command designed for?