HCU MCA 2015 Paper

Note: Answer questions 71 and 72 based on the following algorithm.
START
$\mathrm{\$}$STR := ’ ’ , $\mathrm{\$}$ASTR := ‘a’,
$\mathrm{\$}$BSTR : = ‘b’
WHILE LENGTH ($\mathrm{\$}$STR) < 100
INPUT OPTION AS 1 OR 2
READ OPTION INTO $\mathrm{\$}$OPT
IF ($\mathrm{\$}$OPT = 1) THEN
APPEND $\mathrm{\$}$ASTR IN THE BEGINNING OF $\mathrm{\$}$STR
APPEND $\mathrm{\$}$BSTR IN THE END OF $\mathrm{\$}$STR
END IF
IF ($\mathrm{\$}$OPT = 2) THEN
APPEND COPY OF $\mathrm{\$}$STR AT THE END OF $\mathrm{\$}$STR
ENDWHILE
OUTPUT $\mathrm{\$}$STR
END