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programming languages Online Quiz - 218

Description: programming languages Online Quiz - 218
Number of Questions: 20
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Tags: programming languages
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Which modifier can be used when matching in Perl to ignore case?

technology programming languages

  1. s

  2. v

  3. i

  4. c

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Correct Option: C

Which function can be used to break up a string into more than one part based upon a separator?

technology programming languages

  1. chop

  2. split

  3. divide

  4. parse

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Correct Option: B

Which file test can be done to see if a file has the sticky bit set on it?
technology programming languages

  1. -s

  2. -l

  3. -S

  4. -k

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Correct Option: D

Within a loop, which operator immediately ends execution of the loop?

technology programming languages

  1. next

  2. last

  3. redo

  4. leave

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Correct Option: B

You want to close the directory handle EVAN. Which of the following should you use to accomplish this?

technology programming languages

  1. close EVAN;

  2. closedir EVAN;

  3. close_directory EVAN;

  4. none of the above

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Correct Option: B

Which function can be used to print a message to standard error, but not quit the program?
technology programming languages

  1. warn

  2. alert

  3. tell

  4. notifiy

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Correct Option: A

Your script has just read in a variable from the keyboard and you want to strip that variable of the newline character that came in. What operator should you use to perform this operation?

technology programming languages

  1. tidy

  2. trim

  3. chomp

  4. slim

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Correct Option: C

Which file test can be done to see if a file is a symbolic link?
technology programming languages

  1. -s

  2. -l

  3. -S

  4. -k

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Correct Option: B

Which Perl function can be used to launch a child process to run a program?

technology programming languages

  1. split

  2. spin

  3. fork

  4. system

Show answer
Correct Option: D

AI Explanation

To answer this question, you need to understand how Perl can launch a child process to run a program.

Option A) split - This option is incorrect because the split function in Perl is used to split a string into an array or a list based on a specified delimiter. It is not used for launching child processes.

Option B) spin - This option is incorrect because there is no built-in Perl function called spin. It is not used for launching child processes.

Option C) fork - This option is incorrect because the fork function in Perl is used to create a new process that is a copy of the current process. It is commonly used to create child processes, but it does not directly launch a program. The child process created by fork can then use exec or system to launch a program.

Option D) system - This option is correct because the system function in Perl is used to execute an external program. It launches a child process to run the specified program.

The correct answer is D) system. This option is correct because the system function in Perl can be used to launch a child process to run a program.

Which file test can be done to see if a file exists and has a nonzero size?
technology programming languages

  1. -s

  2. -l

  3. -S

  4. -k

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Correct Option: A

Within Perl, which operator is used to change the working directory?

technology programming languages

  1. cd

  2. chdir

  3. pwd

  4. wd

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Correct Option: B

What is the value of @list at the end of the following program? #!/usr/local/bin/perl @list=(1,2.3); &testsub(*list); Sub testsub{ Local (*sublist)=@_; $sublist[1] = 5; }
technology programming languages

  1. (1,2.3)

  2. (1,5,3)

  3. Will produce error.

  4. (1,4,2)

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Correct Option: B

Consider the following program code: $y = 1; $x = 2; $z = 3; do { print ($y ); } while ($y eq 2); do { print ($x ); } until ($x eq 2); print ($z ); What is the result of executing this program code?

technology programming languages

  1. The code will output the following:123

  2. The code will output the following: 3

  3. The code will output the following:23

  4. The code will output the following: 321

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Correct Option: A

Which line of code represents the correct syntax to establish a reference to a database handle?
technology programming languages

  1. $dbh = DBI::connect("dbi:mysql:myPhoneBook");

  2. $dbh = DBD:->connect("dbi::mysql::myPhoneBook");

  3. $dbh = DBD::connect("mysql:dbi:myPhoneBook");

  4. $dbh = DBI->connect("dbi:mysql:myPhoneBook");

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Correct Option: D

What do the variable $? contains?

technology programming languages

  1. Page length of a particular output file

  2. The input end-of-line character

  3. The return code returned by a command called by the system function.

  4. The error code generated by a system library routine

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Correct Option: C

What do the variable $! contains?
technology programming languages

  1. Page length of a particular output file

  2. The input end-of-line character

  3. The return code returned by a command called by the system function.

  4. The error code generated by a system library routine.

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Correct Option: D

What argument to splice is equivalent to push (@array, @sublist) function call?

technology programming languages

  1. splice (@array,0.0.@sublist);

  2. splice (@array, scalar(@array),0, @sublist);

  3. splice (@array, 1, 0, @sublist);

  4. None of Above

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Correct Option: B

Which statement will print the capital attribute of the $kansas object?
technology programming languages

  1. print ("capital"=>$kansas);

  2. print {$kansas}=>(capital);

  3. print (capital)<={$kansas};

  4. print $kansas->{"capital"};

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Correct Option: D

Which function can be used to make sure your program exits with a nonzero status even if there a standard error?

technology programming languages

  1. hash

  2. noexit

  3. nozero

  4. die

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Correct Option: D

Consider the following program code @array= (“Y”,”W”,”X”); @array=sort(@array); unshift(@array , ”Z”); print($array[0]); What is the output of this code
technology programming languages

  1. W

  2. X

  3. Y

  4. Z

Show answer
Correct Option: D
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