Perl and Java

Which of the following data types are preceded by a dollar sign ($) in Perl?

• Scalar

• Array

• Hashes

• All of the above

Answer explanation

Scalars are preceded by a dollar sign ($).

To verify if the variable $str contains the word “test” you would use

• if ($str = ~/test/)

• if ($str == “test”)

• if ($str = “test”)

• if ($str contains “test”)

To repeat a string, perl uses ___ operator.

• /

• .

• x

• \\

AVD stands for________

What will be the output?

#!/usr/local/bin/perl

$a = 5;

until( $a > 10 ) {

printf "Value of a: $a\n";

$a = $a + 1;

}

• Value of a: 5

  Value of a: 6

  Value of a: 7

  Value of a: 8

  Value of a: 9

  Value of a: 10

• 5 6 7 8 9 10

• Value of a: 5

  6

  7

  8

  9

  10

• Error

Which of the following commands is used to display the directory attributes

• cat

• ls

• mkdir

• cp

Mystery animal game was based on

• 
• 
• 

#!/usr/bin/perl

%data = ('John Paul', 45, 'Lisa', 30, 'Kumar', 40);

print "\$data{'John Paul'} = $data{'John Paul'}\n";

print "\$data{'Lisa'} = $data{'Lisa'}\n";

print "\$data{'Kumar'} = $data{'Kumar'}\n";

What is the output of above code?

• data{'John Paul'} = 45

  data{'Lisa'} = 30

  data{'Kumar'} = 40

• $data{'John Paul'} = 45

  $data{'Lisa'} = 30

  $data{'Kumar'} = 40

• \45=45

  \30=30

  \40=40

• None of the above