1
GATE CSE 2025 Set 2
MCQ (Single Correct Answer)
+1
-0.33

Consider the following statements about the use of backpatching in a compiler for

(I) Backpatching can be used to generate code for Boolean expression in one pass.

(II) Backpatching can be used to generate code for flow-of-control statements in one pass.

Which ONE of the following options is CORRECT?

A
Only (I) is correct.
B
Only (II) is correct.
C
Both (I) and (II) are correct.
D
Neither (I) nor (II) is correct.
2
GATE CSE 2025 Set 2
MCQ (Single Correct Answer)
+1
-0.33

Given the following syntax directed translation rules :

Rule 1 : $R \rightarrow A B\{B . i=R . i-1 ; A . i=B . i R . i=A . i+1 ;\}$

Rule 2 : $P \rightarrow C D\{P . i=C . i+D . i ; D . i=C . i+2\}$

Rule 3 : $Q \rightarrow E F\{Q . i=E . i+F . i ;\}$

Which ONE is the CORRECT option among the following?

A
Rule 1 is S -attributed and L-attributed; Rule 2 is S -attributed and not L-attributed; Rule 3 is neither S -attributed nor L-attributed
B
Rule 1 is neither S-attributed nor L-attributed: Rule 2 is S-attributed and L-attributed: Rule 3 is S-attributed and L-attributed
C
Rule 1 is neither S-attributed nor L-attributed; Rule 2 is not S -attributed and is Lattributed; Rule 3 is S -attributed and L-attributed
D
Rule 1 is S-attributed and not L-attributed; Rule 2 is not S-attributed and is Lattributed: Rule 3 is S -attributed and L-attributed
3
GATE CSE 2021 Set 2
MCQ (Single Correct Answer)
+1
-0.33

Consider the following ANSI C program:

int main() {

Integer x;

return 0;

}

Which one of the following phases in a seven-phase C compiler will throw an error?  

A
Syntax analyzer
B
Semantic analyzer
C
Machine dependent optimizer
D
Lexical analyzer
4
GATE CSE 2016 Set 1
Numerical
+1
-0
Consider the following code segment.
x = u - t;
y = x * v;
x = y + w;
y = t - z;
y = x * y;
The minimum number of total variables required to convert the above code segment to static single assignment form is .
Your input ____
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