C Questions and Answers – Enums – 1

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Enums – 1”.

Pre-requisite for C Enums MCQ set: Video Tutorial on C Enums (Enumeration).

1. A user defined data type, which is used to assign names to integral constants is called ____________
a) Union
b) Array
c) Structure
d) Enum
View Answer

2. What will be the output of the following C code?

#include<stdio.h>
enum colour
{
    blue, red, yellow
};
main()
{
    enum colour c;
    c=yellow;
    printf("%d",c);
}

a) 1
b) 2
c) 0
d) Error
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3. Point out the error (if any) in the following C code?

#include<stdio.h>
enum hello
{
    a,b,c;
};
main()
{
    enum hello m;
    printf("%d",m);
}

a) No error
b) Error in the statement: a,b,c;
c) Error in the statement: enum hello m;
d) Error in the statement: printf(“%d”,m);
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4. String handling functions such as strcmp(), strcpy() etc can be used with enumerated types.
a) True
b) False
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5. What will be the output of the following C code?

#include<stdio.h>
enum hello
{
    a,b=99,c,d=-1
};
main()
{
    enum hello m;
    printf("%d\n%d\n%d\n%d\n",a,b,c,d);
}

a)

    1
    99
    100
    -1

b) Error
c)

    0
    99
    100
    -1

d)

    0
    1
    2
    3

6. Pick the incorrect statement with respect to enums.
a) Two enum symbols cannot have the same value
b) Only integer constants are allowed in enums
c) It is not possible to change the value of enum symbols
d) Enum variables are automatically assigned values if no value is specified
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7. What will be the output of the following C code?

#include<stdio.h>
enum sanfoundry
{
    a=2,b=3.56
};
enum sanfoundry s;
main()
{
    printf("%d%d",a,b);
}

a) 2 3
b) 0 1
c) 2 3.56
d) Error
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8. What will be the output of the following C code?

#include<stdio.h>
enum class
{
    a,b,c
};
enum class m;
main()
{
    printf("%d",sizeof(m));
}

a) 3
b) Same as the size of an integer
c) 3 times the size of an integer
d) Error
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9. What will be the output of the following C code?

#include<stdio.h>
enum hi{a,b,c};
enum hello{c,d,e};
main()
{
    enum hi h;
    h=b;
    printf("%d",h);
    return 0;
}

a) 2
b) 1
c) Error
d) 0
View Answer

10. What will be the output of the following C code?

#include<stdio.h>
enum sanfoundry
{
    a,b,c=5
};
enum sanfoundry s;
main()
{
    c++;
    printf("%d",c);
}

a) Error
b) 5
c) 6
d) 2
View Answer

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