Which of the following are valid ways to access member 'x' of a structure when 'p' is a pointer to that structure?
Correct choices: (*p).x, p->x. Incorrect options violate standard C syntax or semantics for structures/unions.
Which features are supported by C unions?
Correct choices: Unions can be passed as function arguments., Unions can be returned from functions., Unions can contain arrays as members.. Incorrect options violate standard C syntax or semantics for structures/unions.
Which factors contribute to the total size of a structure in C?
Correct choices: Sum of sizes of individual members, Structure member alignment padding bytes added by compiler, Trailing padding bytes to align total structure size to largest alignment boundary. Incorrect options violate standard C syntax or semantics for structures/unions.
Which of the following statements about self-referential structures are TRUE?
Correct choices: They are commonly used to implement linked lists and trees., They contain one or more pointers targeting instances of the same structure type., They require dynamic heap memory allocation during runtime node creation.. Incorrect options violate standard C syntax or semantics for structures/unions.
Which of the following statements about structure padding are CORRECT?
Correct choices: Padding bytes are inserted to align primitive data types to natural word boundaries., Padding reduces CPU memory fetch cycles., #pragma pack(1) can be used to disable padding.. Incorrect options violate standard C syntax or semantics for structures/unions.