C Input and Output

Question 31

C

#include <stdio.h>
// Assume base address of \"GeeksQuiz\" to be 1000
int main()
{
   printf(5 + \"GeeksQuiz\");
   return 0;
}

• GeeksQuiz
  

• Quiz
  

• 1005
  

• Compile-time error
  

Question 32

What does the following C statement mean? 

C

 scanf(\"%4s\", str);

• Read exactly 4 characters from console.
  

• Read maximum 4 characters from console.
  

• Read a string str in multiples of 4
  

• Nothing
  

Question 33

Consider the following ANSI C code segment: 

z=x + 3 + y->f1 + y->f2; 
for (i = 0; i < 200; i = i + 2) 
{ 
if (z > i) 
{ 
p = p + x + 3; 
q = q + y->f1; 
} else 
{ 
p = p + y->f2; 
q = q + x + 3; 
} 
} 
Assume that the variable y points to a struct (allocated on the heap) containing two fields f1 and f2, and the local variables x, y, z, p, q, and i are allotted registers. Common sub-expression elimination (CSE) optimization is applied on the code. The number of addition and the dereference operations (of the form y ->f1 or y ->f2) in the optimized code, respectively, are:

• 403 and 102
  

• 203 and 2
  

• 303 and 102
  

• 303 and 2
  

Question 34

Which of the following is true?

• gets() doesn\'t do any array bound testing and should not be used. 
  

• fgets() should be used in place of gets() only for files, otherwise gets() is fine
  

• gets() cannot read strings with spaces
  

• None of the above
  

Question 35

Predict the output?

C

int fun(char *str1){  char *str2 = str1;  while(*++str1);  return (str1-str2);}int main(){  char *str = \"GeeksQuiz\";  printf(\"%d\", fun(str));  return 0;}

• 10
  

• 9
  

• 8
  

• Random Number
  

Question 36

When a copy constructor may be called?

• When an object of the class is returned by value.
• When an object of the class is passed (to a function) by value as an argument.
• When an object is constructed based on another object of the same class
• When compiler generates a temporary object.
• All of the above

Question 37

'C' Language can be used in ??

• Both System Software and Embedded Systems

• Only System Software

• Only Embedded Systems

• None