Welcome to the Structures and Unions MCQs Page

Dive deep into the fascinating world of Structures and Unions with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Structures and Unions, a crucial aspect of C Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Structures and Unions, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C Programming.

Check out the MCQs below to embark on an enriching journey through Structures and Unions. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Structures and Unions. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Structures and Unions MCQs | Page 21 of 27

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Macro and Preprocessor

Q201.

Consider the following declaration. *(kd —> name + 2) can be used instead of


struct addr 
 {
 char city [10];
 char street [20]; 
 int pincode; 
 };
 struct 
 {
 char name[20];
 int sex; 
 struct addr locate;
 } criminal, *kd * &criminal;

* (criminal .name + 2)

* ( (*kd) .name + 2)

Both (a) & (b)

either (a) or (b), but not (c)

Discuss

Answer: (c).Both (a) & (b)

Q202.

Assuming that bit-fields are accomodated from right to left and word size is 16-bits, consider the following declaration. Information about d will be in the

     static struct
                             {
                               unsigned a : 5;
                               unsigned b : 5;
                               unsigned c : 5;
                               unsigned d : 5;
                              } v =  (1, 2, 3, 4);

first word

second word

in both words

none of the above

Discuss

Answer: (b).second word

Q203.

Assuming that bit-fields are accomodated from right to left and word size is 16-bits, consider the following declaration. If the declaration unsigned c : 5; is replaced by unsigned : 6;
then,

      static struct {
                               unsigned a : 5;
                               unsigned b : 5;
                               unsigned c : 5;
                               unsigned d : 5;
                            } v =  (1, 2, 3, 4);

it results in a syntax error

it is meaningless

the compiler will give a new name for the field, which can be used in the program

none of the above

Discuss

Answer: (d).none of the above

Q204.

Union differs from structure in the following way

All members are used at a time

Only one member can be used at a time

Union cannot have more members

Union initialized all members as structure

Discuss

Answer: (b).Only one member can be used at a time

Q205.

The size of the following union, where an int occupies 4 bytes of memory is

union demo
{
  float x;
  int y;
  char z[10];
};

8 byte

4 byte

10 byte

18 byte

Discuss

Answer: (c).10 byte

Q206.

Members of a union are accessed as________________.

union-name.member

union-pointer->member

Both a & b

None of the mentioned

Discuss

Answer: (c).Both a & b

Q207.

It is not possible to create an array of pointer to structures.

True

False

May be True or False

Can't Say

Discuss

Answer: (b).False

Q208.

Size of union is size of the longest element in the union.

Yes

May Be

Can't Say

Discuss

Answer: (a).Yes

Q209.

Which of the following share a similarity in syntax?

1. Union
2. Structure
3. Arrays
4. Pointers

3 and 4

1 and 2

2 and 3

All of the above

Discuss

Answer: (b).1 and 2

Q210.

Which of the following accesses a variable in structure b?

b->var;

b.var;

b-var;

b>var;

Discuss

Answer: (b).b.var;

Page 21 of 27

Welcome to the Structures and Unions MCQs Page

Structures and Unions MCQs | Page 21 of 27

Explore more Topics under C Programming

C Programming Fundamentals

Data Types,Operators and Expressions in C

Control Flow Statements in C

Functions

Pointers and Arrays in C

Input and Output in C

Library Functions

Strings

File Handling in C

Macro and Preprocessor

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