1
GATE CSE 2006
MCQ (Single Correct Answer)
+2
-0.6
Consider the following C code segment.
for (i = 0; i < n; i++) 
  { 
      for (j=0; j < n; j++) 
      { 
          if (i%2) 
          { 
           x += (4*j + 5*i); 
           y += (7 + 4*j); 
          } 
       } 
  } 
Which one of the following is false?
A
The code contains loop invariant computation
B
There is scope of common sub-expression elimination in this code
C
There is scope of strength reduction in this code
D
There is scope of dead code elimination in this code
2
GATE CSE 2005
MCQ (Single Correct Answer)
+2
-0.6
Consider line number 3 of the following C - program.
int main ( ) {              /* Line 1 */ 
int I, N;                   /* Line 2 */ 
fro (I = 0, I < N, I++);    /* Line 3 */ 
} 
Identify the compiler's response about this line while creating the object-module
A
No compilation error
B
Only a lexical error
C
Only syntactic errors
D
Both lexical and syntactic errors
3
GATE CSE 2003
MCQ (Single Correct Answer)
+2
-0.6
Which of the following is NOT an advantage of using shared, dynamically linked libraries as opposed to using statically linked libraries?
A
Smaller sizes of executable files
B
Lesser overall page fault rate in the system
C
Faster program startup
D
Existing programs need not be re-linked to take advantage of newer versions of libraries
4
GATE CSE 2003
MCQ (Single Correct Answer)
+2
-0.6

Consider the syntax directed definition shown below.

GATE CSE 2003 Compiler Design - Code Generation and Optimization Question 15 English

Here, gen is a function that generates the output code, and newtemp is a function that returns the name of a new temporary variable on every call. Assume that ti's are the temporary variable names generated by newtemp. For the statement 'X : = Y + Z', the 3-address code sequence generated by this definition is

A
$$X = Y + Z$$
B
$${t_1} = Y + Z;X = {t_1}$$
C
$${t_1} = Y;{t_2} = {t_1} + Z;X = {t_2}$$
D
$${t_1} = Y;{t_2} = Z;\,{t_3} = {t_1} + {t_2};X = {t_3}$$
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