Arrays in Perl

Faq.txt

Q1.How can we find the length of the string ?
ans: scalar @array_name will give the length of the array.

Q2. What is the use grep function?
ans: grep function is use to filter out the array according to condition or expression.

Q3.How can we remove a slice of array from an array?
ans: we can use splice function to remove a slice of elements from an array.

Q4. What is the function of unshift?
ans: The unshift function will add a element at the front of the array.

Mcq.txt

Q1.What will be the output of the statement:
      my $arr="1,2,3,4,5";
      print split/","/,$arr;
  
a) 12345
b) 1,2,3,4,5
c) "1,2,3,4,5"
d) None of the above

ans: b)

Q2 What will be the output of the code below:
      my @arr=(1,2,3,4,5);
      print pop @arr,5;
     
a) 5
b) 55
c) 1234
d) none of the above

ans: b)

Q3. What will be the output of this statement:
      my @arr=(1,2,3,4,5);
      for (@arr)
      {
          print $_+2;
      }

a) 12345
b) 34567
c) 23456
d) none of the above

ans: b)

Q4.What will be the output of this statement:
      my @arr=(1,2,3,4,5);
      my($a,$b,$c)=@arr;
      print $c;

a) 1
b) 3
c) 5
d) none of the above

ans: c)