Compiler Design GATE previous year questions with answer

Ques 27 GATE 2014 SET-3

The primary reason of using intermediate code in compilers is to

Ques 28 GATE 2014 SET-3

Which of the following statements are CORRECT?
1) Static allocation of all data areas by a compiler makes it impossible to implement recursion.
2) Automatic garbage collection is essential to implement recursion.
3) Dynamic allocation of activation records is essential to implement recursion.
4) Both heap and stack are essential to implement recursion.

Ques 29 GATE 2014 SET-3

Consider the basic block given below.
a = b + c
c = a + d
d = b + c
e = d – b
a = e + b
The minimum number of nodes and edges present in the DAG representation of the above basic block respectively are

Ques 30 GATE 2014 SET-1

A canonical set of items is given below:
S → L. > R
Q → R.
On input symbol <, the set has