Free Test Defining and declaring... – C Language

Q1: Which keyword is used to define a structure in C?

A. struct B. structure C. record D. define

Q2: Which of the following is a valid structure declaration?

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

Q3: Where can a structure be defined in a C program?

A. Outside all functions B. Inside a function C. Both inside and outside functions D. Only in header files

Q4: What is the size of an empty structure in C?

A. 0 bytes B. 1 byte C. Depends on compiler D. Not allowed in C

Q5: Which operator is used to access members of a structure variable?

A. . B. -> C. :: D. #

Q6: Which operator is used to access members of a structure pointer?

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

Q7: Which of the following is a correct way to declare a structure variable?

A. struct Point p1; B. Point p1; C. declare Point p1; D. var Point p1;

Q8: What does typedef do when used with structures?

A. Creates a pointer B. Defines a constant C. Gives an alias name D. Allocates memory

Q9: Which statement is correct for nested structures?

A. One structure can contain another structure as a member B. C does not support nested structures C. Structures can only have primitive members D. Nested structures require dynamic memory

Q10: Which of the following is valid?

A. struct A { int x; }; struct A a1; B. struct { int x; } a1; C. Both A and B D. None

Q11: Which keyword is used to define an anonymous structure?

A. anon B. No keyword is used C. static D. extern

Q12: What is the purpose of struct tags?

A. To name a structure B. To allocate memory C. To create constants D. To define macros

Q13: Which storage class can be used with a structure variable?

A. auto B. static C. register D. All of the above

Q14: Which of these is not a valid structure member type?

A. int B. float C. pointer D. function definition

Q15: Which of the following is true for structure size?

A. Always equal to sum of members B. May include padding C. Always less than sum of members D. Compiler ignores alignment

Q16: What is the default access specifier for structure members in C?

A. private B. protected C. public D. Depends on compiler

Q17: Which declaration is valid?

A. struct Person { char name[20]; int age; }; B. struct Person { char name; int age; } p1; C. Both A and B D. None

Q18: Which statement is false?

A. Structures can be assigned directly B. Structures can be compared using == C. Structures can have arrays as members D. Structures can be passed to functions

Q19: Which is correct for structure initialization?

A. struct Point p = {1, 2}; B. struct Point p(1, 2); C. Point p = [1, 2]; D. initialize Point p = {1, 2};

Q20: Which function can return a structure in C?

A. Any function B. Only main() C. Only void functions D. Functions cannot return structures

Quiz for Defining and declaring structures