a$)$ Which produces faster program execution, a compiler or a pure interpreter?

Explain why.

b$)$ Why does von Neumann bottleneck strongly influence programming language

design?

a$)$ What is the difference between a synthesized and an inherited attribute?

b$)$ Is aabedecc in the language generated by the following grammar? If so$,$ draw the

parse tree. If not, show why.

$i.S$aSb$|bAA$

$ii.Ab\{aB\}|b$

$ii.BaB|bA($:$S>a($:$S>c||b$

$($:$A>c|c$

$($:$B>d|$

$a)$ What $is$ Left Recursion? Define lexeme and token.

$b)$ Perform the pairwise disjointness test for the following grammar rules.

$i.S$aSb$|bAA$

$ii.Ab\{aB\}|b$

$ii.BaB|bA$

$a)$ Consider the following program, written $in$ JavaScript$-$like syntax:

Given the following calling sequences and assuming that dynamic scoping $is$

used. what variables are visible during execution $of$ the last subprogram

activated? Include with each visible variable the name $of$ the unit where $itis$

declared.

"main calls sub$1$; sub$1$ calls sub$3$; sub$3$ calls sub$2."$

$b)$ What $is$ the purpose $of$ LET construct? Give example.

$a$