C Programming Multiple Choice Question - Structure And Union

This section focuses on the "Structure And Union" of the C programming. These Multiple Choice Questions (mcq) should be practiced to improve the C programming skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

1. Which of the following are themselves a collection of different data types?

A. String
B. Structures
C. Char
D. None of the above

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2. Which operator connects the structure name to its member name?

A. -
B. ->
C. .
D. both . and ->

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3. Which of the following cannot be a structure member?

A. Function
B. Array
C. Structure
D. None of the above

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4. What is the correct syntax to declare a function foo() which receives an array of structure in function?

A. void foo(struct *var);
B. void foo(struct *var[]);
C. void foo(struct var);
D. none of the mentioned

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5. Union differs from structure in the following way

A. All members are used at a time
B. Only one member can be used at a time
C. Union cannot have more members
D. Union initialized all members as structure

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

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

A. 8 byte
B. 4 byte
C. 10 byte
D. 18 byte

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7. Members of a union are accessed as________________.

A. union-name.member
B. union-pointer->member
C. Both a & b
D. None of the mentioned

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

A. TRUE
B. FALSE
C. May Be
D. Can't Say

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9. Which of the following statement is True?

A. User has to explicitly define the numeric value of enumerations
B. User has a control over the size of enumeration variables.
C. Enumeration can have an effect local to the block, if desired
D. Enumerations have a global effect throughout the file.

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

A. Yes
B. No
C. May Be
D. Can't Say

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