Placement Papers - ORACLE

PAPER: ORACLE PLACEMENT PAPER-2003 (TECHNICAL-C)
 
1.
 
#include 
 
#define sqr(x) (x*x)
 
int main()
 
{
 
int x=2;
 
printf("value of x=%d",sqr(x+1));
 
}
 
  What is the value of x?
 
a)4  b)5  c) None  d) can not compile
 
Ans: 5
 
2. what is the wrong in the following program?
 
#define LBRACKET {
 
#define RBRACKET }
 
#define MAIN main
 
int MAIN()
 
LBRACKET
 
int x=2;
 
printf("%d",x);
 
RBRACKET
 
a) This program will compile
 
b) compilation error
 
3.
 
#include 
 
int main()
 
{
 
int x=4;
 
{
 
{
 
{
 
int x=2;
 
printf("%d",x);
 
}
 
}
 
}
 
}
 
a) 4  b)2   c) Nesting not allowed  d) dependent on the compiler
 
4. Go through the following code snippet
 
char a[20];
 
a="Hello Orcale Test";
 
will this compile?
 
a) Compilation Error b) Strings are allowed in c but cannot be assigned directly.
 
c) dependent on compiler
 
d) will work fine.
 
5. the expression a+b*c should be conveted to +a*bc. Using tree structure, Which traversal is the correct one?
 
a) Postfix traversal  b) prefix traversal  c) infix traversal  d)None
 
6. what about brk, sbrk
 
a) system calls  b) function calls  c) user defined functions
 
7. Why the use of alloca() is discouraged?
 
8. Macros support multiple arguments ?
 
9. the header file
 
a) contains only compiler directives and extern variables
 
b) contain only structures and union
 
c) a & b
 
10. what about "char *(*(*a[])())();"