C Programming - C Structures And Unions Questions and Answers

In the C language structures are used to group together different types of variables under the same name. Following question bank related to the MCQ questions about C structures and unions

1. What is the output of following C code?

main()

{

   struct emp

   {

     char name[20];

     int age;

     float sal;

   };

   struct emp e ={"Tiger"}

   printf("%d%d%f",e.age,e.sal);

}

[A] Error

[B] Garbage Collection

[C] 0 0.000000

[D] 1 0.000000

2. Which of the following comment about the usage of structures in true?

[A] Storage class can be assigned to individual member

[B] Individual members can be initialized within a structure type declaration

[C] The scope of the member name is confined to the particular structure, within which it is defined

[D] None of above

3. Which of the following comment about Union is false?

[A] Union is a structure whose members share same memory area

[B] The compiler will keep track of what type of information is currently stored

[C] Only one of the members of union can be assigned a value at particular time

[D] Size allocated for Union is the size of its member needing the maximum storage

4. Which of the following is a collection of different data types?

[A] String

[B] Array

[C] Structure

[D] Files

5. For accessing a structure element using a pointer,you must use?

[A] Pointer operator (&)

[B] Dot operators(.)

[C] Pointer operator(*)

[D] Arrow operator(->)

6. Which operator is used to connect structure name to its member name?

[A] dot operator(.)

[B] logical operator(&&)

[C] pointer operator(&)

[D] Arrow operator(->)

7. In C, structure values can be passed as arguments to function by?

[A] passing each member of the structure as an argument of function call

[B] passing copy of the entire structure to the called function

[C] passing structure as an argument using pointer

[D] All of above

8. A -> B is syntactically correct if?

[A] a and b are structure

[B] a is a structure and b is a pointer to structure

[C] a is a pointer to structure and b is a structure

[D] a is a pointer to structure in which b is a field

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C Programming - C Structures And Unions Questions and Answers

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