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- Question
The '->' operator can be used to access structures elements using a pointer to a structure variable only
Options- A. True
- B. False
- Correct Answer
- True
- 1. Union elements can be of different sizes.
Options- A. True
- B. False Discuss
- 2. A structure can be nested inside another structure.
Options- A. True
- B. False Discuss
- 3. Nested unions are allowed
Options- A. True
- B. False Discuss
- 4. Point out the error in the program in 16-bit platform?
#include<stdio.h> int main() { struct bits { int i:40; }bit; printf("%d\n", sizeof(bit)); return 0; }
Options- A. 4
- B. 2
- C. Error: Bit field too large
- D. Error: Invalid member access in structure Discuss
- 5. Point out the error in the program?
#include<stdio.h> #include<string.h> void modify(struct emp*); struct emp { char name[20]; int age; }; int main() { struct emp e = {"Sanjay", 35}; modify(&e); printf("%s %d", e.name, e.age); return 0; } void modify(struct emp *p) { p ->age=p->age+2; }
Options- A. Error: in structure
- B. Error: in prototype declaration unknown struct emp
- C. No error
- D. None of above Discuss
- 6. 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
- 7. The '.' operator can be used access structure elements using a structure variable.
Options- A. True
- B. False Discuss
- 8. A union cannot be nested in a structure
Options- A. True
- B. False Discuss
- 9. Bit fields CANNOT be used in union.
Options- A. True
- B. False Discuss
- 10. one of elements of a structure can be a pointer to the same structure.
Options- A. True
- B. False Discuss
Structures, Unions, Enums problems
Search Results
Correct Answer: True
Correct Answer: True
Correct Answer: True
Correct Answer: Error: Bit field too large
Correct Answer: Error: in prototype declaration unknown struct emp
Explanation:
The
struct emp is mentioned in the prototype of the function
modify() before declaring the structure.To solve this problem declare
struct emp before the
modify() prototype.
Correct Answer: Enumeration can have an effect local to the block, if desired
Correct Answer: True
Correct Answer: False
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: True
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