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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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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

  1. W

  2. X

  3. Y

  4. Z


Correct Option: D

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

  1. hash

  2. noexit

  3. nozero

  4. die


Correct Option: D

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

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

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

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

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


Correct Option: D

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

  1. splice (@array,[email protected]);

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

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

  4. None of Above


Correct Option: B

What do the variable $! contains?

  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.


Correct Option: D

What do the variable $? contains?

  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


Correct Option: C

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

  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");


Correct Option: D

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?

  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


Correct Option: A

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)[email protected]_; $sublist[1] = 5; }

  1. (1,2.3)

  2. (1,5,3)

  3. Will produce error.

  4. (1,4,2)


Correct Option: B

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

  1. cd

  2. chdir

  3. pwd

  4. wd


Correct Option: B

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

  1. -s

  2. -l

  3. -S

  4. -k


Correct Option: A

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

  1. split

  2. spin

  3. fork

  4. system


Correct Option: D

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

  1. -s

  2. -l

  3. -S

  4. -k


Correct Option: B

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?

  1. tidy

  2. trim

  3. chomp

  4. slim


Correct Option: C

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

  1. warn

  2. alert

  3. tell

  4. notifiy


Correct Option: A

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

  1. close EVAN;

  2. closedir EVAN;

  3. close_directory EVAN;

  4. none of the above


Correct Option: B

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

  1. next

  2. last

  3. redo

  4. leave


Correct Option: B

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

  1. -s

  2. -l

  3. -S

  4. -k


Correct Option: D

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

  1. chop

  2. split

  3. divide

  4. parse


Correct Option: B

Which modifier can be used when matching in Perl to ignore case?

  1. s

  2. v

  3. i

  4. c


Correct Option: C
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