Quiz for typedef keyword

Q1: What is the purpose of the typedef keyword in C?

A. To create new data type names B. To define variables C. To declare functions D. To allocate memory

Q2: How do you use typedef to define "Student" as alias for struct student?

A. typedef struct student Student; B. struct student typedef Student; C. typedef Student struct student; D. Student typedef struct student;

Q3: After typedef, how do you declare a variable of type Student?

A. Student s1; B. struct Student s1; C. typedef Student s1; D. struct s1;

Q4: Can typedef be used with pointers?

A. Yes, to simplify pointer syntax B. No, only with basic types C. Only with structs D. Only with arrays

Q5: Which typedef declaration creates a pointer alias "IntPtr" to int?

A. typedef int *IntPtr; B. typedef *int IntPtr; C. typedef IntPtr *int; D. typedef int IntPtr*;

Q6: What is the benefit of using typedef for complex types?

A. Makes code easier to read and maintain B. Increases memory usage C. Slows down compilation D. Disables type checking

Q7: Can typedef define an alias for arrays?

A. Yes B. No C. Only for pointers D. Only for functions

Q8: Which of these typedef declarations is correct for an array of 10 ints?

A. typedef int IntArray[10]; B. typedef int[10] IntArray; C. typedef int IntArray; D. typedef array IntArray[10];

Q9: How to typedef a function pointer "FuncPtr" that takes int and returns void?

A. typedef void (*FuncPtr)(int); B. typedef void FuncPtr(int); C. typedef FuncPtr void (*)(int); D. typedef void *FuncPtr(int);

Q10: Is typedef creating new types or aliases?

A. Aliases only B. New independent types C. Memory allocators D. Preprocessor directives

Q11: Can typedef be combined with struct declaration?

A. Yes, to define alias and struct together B. No, must be separate C. Only in C++ D. Only for enums

Q12: What does this code do? "typedef struct { int x; int y; } Point;"

A. Defines Point as alias for unnamed struct B. Defines a variable Point C. Defines a function Point D. Defines a pointer Point

Q13: Can typedef be used for enums?

A. Yes B. No C. Only with structs D. Only with unions

Q14: What is the result of typedef int Number;?

A. Number is alias for int B. Number is a new type C. Number is a variable D. Number is a function

Q15: How to declare an alias for "unsigned long" as "ULong"?

A. typedef unsigned long ULong; B. typedef unsigned ULong long; C. typedef long unsigned ULong; D. typedef ULong unsigned long;

Q16: What is the effect of typedef on compilation?

A. No runtime effect, only compile-time alias B. Increases runtime size C. Decreases speed D. Changes memory layout

Q17: Can typedef alias a pointer to a function?

A. Yes B. No C. Only in C++ D. Only with structs

Q18: Which typedef makes "StrPtr" a pointer to char?

A. typedef char *StrPtr; B. typedef *char StrPtr; C. typedef StrPtr char *; D. typedef char StrPtr *;

Q19: Why use typedef with pointers?

A. To simplify declarations and improve clarity B. To hide pointers completely C. To create new pointer types D. To prevent pointer usage

Q20: Can typedef be undefined?

A. No, typedef cannot be undefined like macros B. Yes, with #undef C. Yes, with typedef void D. Yes, with typedef NULL