Enums_Quiz.md - brainchildservices/curriculum GitHub Wiki

1. Which among the following cannot be used as a data type for an enum in C#.NET?

a) short

b) double

c) int

d) all of the mentioned

Answer: b

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

   enum days: int {

      sunday = -3,
   
      Monday,
   
      Tuesday
   

   }

   Console.WriteLine((int)days.sunday);

   Console.WriteLine((int)days.monday);

   Console.WriteLine((int)days.tuesday);

a) -3 0 1

b) 0 1 2

c) -3 -2 -1

d) sunday monday tuesday

Answer: c

3. Wrong statement about enum used in C#.NET is?

a) An enum can be declared inside a class

b) An object cannot be assigned to an enum variable

c) An enum can be declared outside a class

d) An enum can have Single and Double values

Answer: d

4. What will be the output of the following C# code?

enum per

{ a,

 b, 

 c, 

 d, 

}

per.a = 10;

Console.writeline(per.b);

a) 11

b) 1

c) 2

d) compile time error

Answer: d

Explanation: It will report an error since enum element cannot be assigned a value outside the enum declaration.

5. What will be the output of the following C# code?

enum color:int

{ red,

green,

blue = 5,

cyan,

pink = 10,

brown

}

console.writeline((int)color.green);

console.writeline((int)color.brown);

a) 2 10

b) 2 11

c) 1 11

d) 1 5

Answer: c

6. What will be the output of the following C# code?

enum letters

 {

      a,

      b,

      c

  } 

letters l;

l = letters.a;

Console.writeline(l);

a) -1

b) 0

c) a

d) letters.a

Answer: c

7. An enum is a special "class" that represents a group of --------------

   Ans: constants

8. Why And When To Use Enums?

Ans: Use enums when you have values that you know aren't going to change, like month days, days, colors, deck of cards, etc.

9.The C# ---------- keyword is used to declare an enumeration.

and: enum

10. The modifiers of an enum declaration have the same meaning as of a class declaration

    Ans: class

11. Which of the following CANNOT be used as an underlying datatype for an enum in C#.NET?

A. byte

B. short

C. float

D. int

Answer: Option C

12. What is the value of first enum member by default in C# ?

    Ans: Zero

13. What is the type of an enum by default in C# ?

    Ans: int

14. Can i use Implicit and Explicit conversion in Enumerator ?

    Ans: Yes.