Structures and Union

What is a structure in C?

• A data type used to store integers only

• A user-defined data type that groups related variables

• loop structure

• pre-defined C function

Which keyword is used to define a structure in C?

• struct

• define

• typedef

• union

What is the correct way to declare a structure named Student with name and age?

• struct Student { char name[50]; int age; };

• structure Student { char name[50]; int age; };

• define Student { name[50], age };

• Student { char name[50]; int age; };

How do you access the member age of a structure variable s1?

• s1 -> age

• s1.age

• s1:age

• s1(age)

How do you create a variable s1 of type struct Student?

• Student s1;

• struct s1 Student;

• struct Student s1;

• Student: s1;

Can structures hold different data types?

• No, all members must be same type

• Yes, only integers and floats

• Yes, any combination of data types

• Only characters

What is the size of a structure dependent on?

• Number of members

• Type and size of members

• Order of declaration

• All of the above

What is the use of typedef with structures?

• Increases memory

• Simplifies structure name usage

• Adds more members

• Adds more members

Which operator is used to access structure members using a pointer?

• .

• ->

• *

• &

What will this code output?

struct Test { int x; };

int main() { struct Test t = {10};

printf("%d", t.x);

return 0;

}

• Error

• 0

• 10

• Garbage value