I want the script to check the file for string "Response Queue Size: 0", and if this string has other than numerical 0, I want this to be print to my screen.

open my $infile, '<', 'C:/Users/katragas/Desktop/apadmin_get_status_lo
+g.txt' or die $!;
while( <$infile> ) {
  if( /Response Queue Size: (\d+)/ ) {
    print unless $1 == 0;
  }
}
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Your specification is fairly clear now; you've outlined the criteria. The next step is to implement those criteria:

• Iterate over the lines of the file.
• If a line matches "Response Queue Size: ", followed by a number, this is a line of interest.
• If that number turns out to not be zero, print the line to your screen.

The code I provided above follows those three steps: The while loop iterates over the file, the 'if' statement looks for a pattern of interest, and the 'print unless' statement prints the line unless that line of interest has a number equal to zero associated with it.