Enumerations(C++ Programming ) Questions and answers for exam Preparation

What is output of the this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int i;
6.
enum month {
7.
JAN = 1, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC
8.
};
9.
for (i = MAR; i

01234567891011
123456789101112
34567891011
123456789

Explanation:-

Answer: Option C. -> 34567891011

we are getting the values from march to november and printing its concern number.

Question 2.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
enum colour {
4.
green, red, blue, white, yellow, pink
5.
};
6.
int main()
7.
{
8.
cout

012345
123456
compile time error
runtime error

Explanation:-

Answer: Option A. -> 012345

The enumerator values start from zero if it is unassigned.
Output:
$ g++ enum3.cpp
$ a.out
012345

Question 3.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
enum channel {star, sony, zee};
6.
enum symbol {hash, star};
7.
int i = 0;
8.
for (i = star; i

012
123
compile time error
runtime error

Explanation:-

Answer: Option C. -> compile time error

enumartion variable 'star' appears two times in main() which causes the error. An enumaration

constant must be unique within the scope.

Question 4.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
enum test {
4.
A = 32, B, C
5.
};
6.
int main()
7.
{
8.
cout

323334
323232
323130
none of the mentioned

Explanation:-

Answer: Option A. -> 323334

If we not assigned any value to enum variable means, then the next number to initialized number will

be allocated to the variable.
Output:
$ g++ enum2.cpp
$ a.out
323334

Question 5.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
enum cat {
4.
temp = 7
5.
};
6.
int main()
7.
{
8.
int age = 14;
9.
age /= temp;
10.
cout

If you were cat, you would be 5
If you were cat, you would be 2
If you were cat, you would be 7
none of the mentioned

Explanation:-

Answer: Option B. -> If you were cat, you would be 2

The age will be divided by using compound assignment operator and so it will return the age of the

cat according to your age.
$ g++ enum1.cpp
$ a.out
If you were cat, you would be 2

Question 6.

Which variable does equals in size with enum variable?

int variable
float variable
string variable
none of the mentioned

Explanation:-

Answer: Option A. -> int variable

The enum variable are converted to integer and stored by compiler. So both are equal in size.

Question 7.

What will happen when defining the enumerated type?

it will not allocate memory
it will allocate memory
it will not allocate memory to its variables
none of the mentioned

Explanation:-

Answer: Option A. -> it will not allocate memory

Enumerator will allocate the memory when its variables are defined.

Question 8.

To which of these enumerators can be assigned?

integer
negative
enumerator
all of the mentioned

Explanation:-

Answer: Option D. -> all of the mentioned

Since enumerators evaluate to integers, and integers can be assigned to enumerators, enumerators

can be assigned to other enumerators.

Question 9.

In which type does the enumerators are stored by the compiler?

string
integer
float
none of the mentioned

Explanation:-

Answer: Option B. -> integer

None.

Question 10.

Identify the incorrect option.

enumerators are constants
enumerators are user defined types
enumerators are same as macros
enumerator values start from 0 by default

Explanation:-

Answer: Option C. -> enumerators are same as macros

enumerators are used in order to create our own types whereas macros are textual substitutions.