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#include <stdio.h> 
int main() 
{ 
    char *str1 = "GeeksQuiz"; 
    char str2[] = "GeeksQuiz"; 
  
    printf("sizeof(str1) = %d, sizeof(str2) = %d", 
           sizeof(str1), sizeof(str2)); 
  
    return 0; 
}

 

  • A.sizeof(str1) = 10, sizeof(str2) = 10
  • B.sizeof(str1) = 4, sizeof(str2) = 10
  • C.sizeof(str1) = 4, sizeof(str2) = 4
  • D.sizeof(str1) = 10, sizeof(str2) = 4

Answer: B

Correct answer: sizeof(str1) = 4, sizeof(str2) = 10

str1 is a pointer, so sizeof gives the size of a pointer - 4 bytes on a 32-bit build. str2 is an array, so sizeof gives the whole array: 9 characters plus the terminating null, 10. The initialiser looks identical in the two cases, which is what makes this worth knowing.

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