Quiz for Pointer arithmetic

Q1: What is the size increment of an integer pointer when incremented by 1 in C?

A. Increases by 1 byte B. Increases by 2 bytes C. Increases by sizeof(int) bytes D. Increases by sizeof(pointer) bytes

Q2: If p is a char pointer pointing to address 1000, p+2 will point to?

A. 1002 B. 1004 C. 1006 D. 1008

Q3: Pointer subtraction between two pointers gives result in?

A. Bytes B. Number of elements C. Address difference D. Integer typecast

Q4: If arr is an int array, arr+3 points to?

A. 3rd element B. 4th element C. Address after 3 bytes D. Address after 6 bytes

Q5: Can you add two pointers in C?

A. Yes, always B. Yes, only for char pointers C. No D. Yes, for same type

Q6: If p is a float pointer and sizeof(float)=4, p+5 increases the address by?

A. 5 bytes B. 9 bytes C. 20 bytes D. 25 bytes

Q7: Which of these is valid pointer arithmetic?

A. Pointer + Integer B. Pointer + Pointer C. Integer - Pointer D. Pointer * Integer

Q8: If p is an int pointer at 1000, sizeof(int)=4, p++ will be?

A. 1001 B. 1002 C. 1004 D. 1008

Q9: When subtracting two pointers, the result type is?

A. int B. long C. size_t D. ptrdiff_t

Q10: What happens if you add 1 to a void pointer in C?

A. Increments by 1 byte B. Size unknown — invalid in standard C C. Increments by sizeof(void) D. Depends on compiler

Q11: Which operation is NOT allowed on pointers?

A. Pointer + Integer B. Pointer - Integer C. Pointer - Pointer D. Pointer / Integer

Q12: If q = p + n, what does n represent?

A. Bytes B. Number of elements C. Memory locations D. Indexes

Q13: Which expression accesses the third element of array arr using pointers?

A. arr[2] B. *(arr + 2) C. *arr + 2 D. Both A and B

Q14: If int a[5] = {1,2,3,4,5}, *(a+4) is?

A. 1 B. 4 C. 5 D. Garbage value

Q15: Pointer arithmetic depends on?

A. Pointer base type B. CPU architecture C. Both A and B D. Neither A nor B

Q16: If char *p = 0x1000, p+10 points to?

A. 0x100A B. 0x1020 C. 0x1010 D. 0x1040

Q17: Which statement is true about pointer increment?

A. Increases by 1 byte B. Increases by sizeof(type) C. Increases by 4 bytes always D. Increases by 8 bytes always

Q18: If p and q are int pointers, p - q returns?

A. Address difference in bytes B. Address difference in elements C. Absolute byte difference D. None

Q19: Adding an integer k to pointer p results in?

A. Moving p by k bytes B. Moving p by k * sizeof(type) bytes C. Moving p by k words D. Moving p by 2k bytes

Q20: What is the output of sizeof(p2 - p1) if p1 and p2 are int pointers?

A. Depends on OS B. Always size of int C. Size of ptrdiff_t D. Size of long