Quiz for Nested structures

Q1: What is a nested structure in C?

A. A structure containing another structure as a member B. A structure with pointers C. A structure with arrays D. A structure used in a union

Q2: How do you access a member of a nested structure?

A. outer.inner.member B. outer->inner->member C. outer.inner->member D. outer->inner.member

Q3: Given "struct Point { int x; int y; }; struct Rectangle { struct Point p1, p2; } rect;", how to access x of p1?

A. rect.p1.x B. rect.p2.x C. rect->p1.x D. rect->p2.x

Q4: Can nested structures contain further nested structures?

A. Yes, recursively B. No, only one level allowed C. Only if typedef is used D. Only in C++

Q5: How do you declare a pointer to a nested structure member?

A. struct Point *ptr = &rect.p1; B. struct Point ptr = rect.p1; C. struct Rectangle *ptr = ▭ D. struct Rectangle ptr = rect;

Q6: Which operator accesses members through a pointer to nested structure?

A. -> B. . C. * D. &

Q7: If "struct Rectangle *rptr = ▭", how to access x of p2?

A. rptr->p2.x B. rptr->p2->x C. rptr.p2.x D. (*rptr).p2->x

Q8: Can you assign one nested structure member to another?

A. Yes, entire structure assignment allowed B. No, only individual members C. Only pointers can be assigned D. Only in C++

Q9: What is the size of a nested structure?

A. Sum of all member sizes including nested B. Size of largest member C. Always 4 bytes D. Depends on compiler only

Q10: Can nested structures be initialized directly?

A. Yes, using nested braces B. No, must assign members individually C. Only pointers can be initialized D. Only global variables

Q11: Example of nested structure initialization:

A. struct Rectangle rect = { {0,0}, {10,10} }; B. struct Rectangle rect = { 0, 0, 10, 10 }; C. struct Rectangle rect = {0, 10}; D. struct Rectangle rect;

Q12: Which of the following is valid to access nested structure member via pointer?

A. (*rptr).p1.x B. rptr->p1->x C. rptr.p1.x D. rptr->p1.x

Q13: What does this expression mean: "rect.p1.x"?

A. Access x of point p1 inside rect B. Access p1 of x inside rect C. Access rect of x inside p1 D. Access pointer x of p1

Q14: Can nested structures contain arrays?

A. Yes B. No C. Only in C++ D. Only if static

Q15: What will happen if you assign a nested structure directly?

A. Shallow copy of all members B. Deep copy C. Pointer copy D. Compiler error

Q16: How to declare a typedef for a nested structure "Point"?

A. typedef struct Point { int x; int y; } Point; B. typedef struct { int x; int y; } Point; C. typedef struct Point Point; D. typedef Point struct { int x; int y; };

Q17: Which is the correct way to pass a nested structure to a function?

A. By value B. By pointer C. Both A and B D. Neither

Q18: Can you use a pointer to a nested structure member?

A. Yes B. No C. Only for unions D. Only for arrays

Q19: How to print nested structure member "x" in rect.p1 using printf?

A. printf("%d", rect.p1.x); B. printf("%d", rect->p1->x); C. printf("%d", *rect.p1.x); D. printf("%d", &rect.p1.x);

Q20: What is a common use case of nested structures?

A. Modeling complex data with hierarchical relationship B. Improving performance C. Optimizing memory D. Avoiding pointers