Here is what I get in $?: 
  DB<5> x $?,$!
0  '-1'
1  'Cannot allocate memory'

  DB<6> x qx|pwd|
  empty array

  DB<7> x $?, $!
0  '-1'
1  'Cannot allocate memory'

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Memory utilization (ps -auxf):
admin 5033 6.3 61.4 1301804 1251316 pts/1 S+ 16:56 2:17 | \_ perl -d Program-name

     Syntactic sugar causes cancer of the semicolon.        --Alan Perlis

In reply to Re^2: backticks and 'Cannot allocate memory' by NetWallah
in thread backticks and 'Cannot allocate memory' by NetWallah

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