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- Question
one of elements of a structure can be a pointer to the same structure.
Options- A. True
- B. False
- Correct Answer
- True
- 1. Bit fields CANNOT be used in union.
Options- A. True
- B. False Discuss
- 2. A union cannot be nested in a structure
Options- A. True
- B. False Discuss
- 3. The '.' operator can be used access structure elements using a structure variable.
Options- A. True
- B. False Discuss
- 4. Which of the following statement is True?
Options- A. User has to explicitly define the numeric value of enumerations
- B. User has a control over the size of enumeration variables.
- C. Enumeration can have an effect local to the block, if desired
- D. Enumerations have a global effect throughout the file. Discuss
- 5. The '->' operator can be used to access structures elements using a pointer to a structure variable only
Options- A. True
- B. False Discuss
- 6. A structure can contain similar or dissimilar elements
Options- A. True
- B. False Discuss
- 7. It is not possible to create an array of pointer to structures.
Options- A. True
- B. False Discuss
- 8. If a char is 1 byte wide, an integer is 2 bytes wide and a long integer is 4 bytes wide then will the following structure always occupy 7 bytes?
struct ex { char ch; int i; long int a; };
Options- A. Yes
- B. No Discuss
- 9. Can we have an array of bit fields?
Options- A. Yes
- B. No Discuss
- 10. size of union is size of the longest element in the union
Options- A. Yes
- B. No Discuss
Structures, Unions, Enums problems
Search Results
Correct Answer: False
Explanation:
The following is the example program to explain "using bit fields inside an union".
#include<stdio.h>
union Point
{
unsigned int x:4;
unsigned int y:4;
int res;
};
int main()
{
union Point pt;
pt.x = 2;
pt.y = 3;
pt.res = pt.y;
printf("\n The value of res = %d" , pt.res);
return 0;
}
// Output: The value of res = 3
Correct Answer: False
Correct Answer: True
Correct Answer: Enumeration can have an effect local to the block, if desired
Correct Answer: True
Correct Answer: True
Correct Answer: False
Correct Answer: No
Explanation:
A compiler may leave holes in structures by padding the first char in the structure with another byte just to ensures that the integer that follows is stored at an location. Also, there might be 2extra bytes after the integer to ensure that the long integer is stored at an address, which is multiple of 4. Such alignment is done by machines to improve the efficiency of accessing values.
Correct Answer: No
Correct Answer: Yes
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