Here is a listing of C Objective Questions on “Typedefs” along with answers, explanations and/or solutions:
1. Which is the correct syntax to use typedef for struct?
a)
typedef struct temp { int a; }TEMP;
b)
typedef struct { int a; }TEMP;
c)
struct temp { int a; }; typedef struct temp TEMP;
d) All of the mentioned
Answer: d
Clarification: None.
2. Which option should be selected to work the following C expression?
a) typedef char [] string;
b) typedef char *string;
c) typedef char [] string; and typedef char *string;
d) Such expression cannot be generated in C
Answer: b
Clarification: None.
3. Which of the given option is the correct method for initialization?
a) *string *p = “Hello”;
b) string p = “Hello”;
c) *string p = ‘A’;
d) Not more than one space should be given when using typedef
Answer: b
Clarification: None.
4. Which of the following is false about typedef?
a) typedef follow scope rules
b) typedef defined substitutes can be redefined again. (Eg: typedef char a; typedef int a;)
c) You cannot typedef a typedef with other term
d) All of the mentioned
Answer: b
Clarification: None.
5. Which of the following may create problem in the typedef program?
a) ;
b) printf/scanf
c) Arithmetic operators
d) All of the mentioned
Answer: d
Clarification: None.
6. typedef int (*PFI)(char *, char *)creates ___________
a) type PFI, for pointer to function (of two char * arguments) returning int
b) error
c) type PFI, function (of two char * arguments) returning int
d) type PFI, for pointer
Answer: a
Clarification: None.
7. What is typedef declaration?
a) Does not create a new type
b) It merely adds a new name for some existing type
c) Does not create a new type, It merely adds a new name for some existing type
d) None of the mentioned
Answer: c
Clarification: None.
8. What will be the output of the following C code?
-
#include -
typedef struct student
-
{ -
char *a;
-
}stu;
-
void main()
-
{ -
stu s; -
s.a = "hi";
-
printf("%s", s.a);
-
}s
a) Compile time error
b) Varies
c) hi
d) h
Answer: a
Clarification: None.