Enumerations problems
- 1. Which of the following statements is correct about the C#.NET code snippet given below?
enum color : byte { red = 500, green = 1000, blue = 1500 }
Options- A. byte values cannot be assigned to enum elements.
- B. enum elements should always take successive values.
- C. Since 500, 1000, 1500 exceed the valid range of byte compiler will report an error.
- D. enum must always be of int type.
- E. enum elements should be declared as private. Discuss
Correct Answer: Since 500, 1000, 1500 exceed the valid range of byte compiler will report an error.
- 2. Which of the following statements is correct about the C#.NET code snippet given below?
enum per { married, unmarried, divorced, spinster } per.married = 10; Console.WriteLine(per.unmarried);
Options- A. The program will output a value 11.
- B. The program will output a value 1.
- C. The program will output a value 2.
- D. The program will report an error since an enum element cannot be assigned a value outside the enum declaration.
- E. The enum elements must be declared private. Discuss
Correct Answer: The program will report an error since an enum element cannot be assigned a value outside the enum declaration.
- 3. Which of the following is the correct output for the C#.NET code snippet given below?
enum color { red, green, blue } color c; c = color.red; Console.WriteLine(c);
Options- A. 1
- B. -1
- C. red
- D. 0
- E. color.red Discuss
Correct Answer: red
- 4. Which of the following is the correct output for the C#.NET code snippet given below?
enum color { red, green, blue } color c = color.red; Type t; t = c.GetType(); string[ ]str; str = Enum.GetNames(t); Console.WriteLine(str[ 0 ]);
Options- A. red
- B. 0
- C. 1
- D. -1
- E. color.red Discuss
Correct Answer: red
- 5. Which of the following is the correct output for the C#.NET code snippet given below?
enum color: int { red, green, blue = 5, cyan, magenta = 10, yellow } Console.Write( (int) color.green + ", " ); Console.Write( (int) color.yellow );
Options- A. 2, 11
- B. 1, 11
- C. 2, 6
- D. 1, 5
- E. None of the above Discuss
Correct Answer: 1, 11
- 6. Which of the following statements are correct about an enum used inC#.NET?
- To use the keyword enum, we should either use [enum] or System.Enum.
- enum is a keyword.
- Enum is class declared in System.Type namespace.
- Enum is a class declared in the current project's root namespace.
- Enum is a class declared in System namespace.
Options- A. 1, 3
- B. 2, 4
- C. 2, 5
- D. 3, 4 Discuss
Correct Answer: 2, 5
- 7. Which of the following will be the correct output for the C#.NET code snippet given below?
enum color : int { red = -3, green, blue } Console.Write( (int) color.red + ", "); Console.Write( (int) color.green + ", "); Console.Write( (int) color.blue );
Options- A. -3, -2, -1
- B. -3, 0, 1
- C. 0, 1, 2
- D. red, green, blue
- E. color.red, color.green, color.blue Discuss
Correct Answer: -3, -2, -1
- 8. Which of the following statements are correct about an enum used in C#.NET?
- An enum can be declared inside a class.
- An enum can take Single, Double or Decimal values.
- An enum can be declared outside a class.
- An enum can be declared inside/outside a namespace.
- An object can be assigned to an enum variable.
Options- A. 1, 3, 4
- B. 2, 5
- C. 3, 4
- D. 2, 4, 5 Discuss
Correct Answer: 1, 3, 4
- 9. Which of the following statements is correct about an enum used in C#.NET?
Options- A. enum is a reference type.
- B. enum is a value type.
- C. Whether it a value type or a reference type depends upon size.
- D. Whether it a value type or a reference type depends upon a Project Setting made in Visual Stiiclio.NET.
- E. We can programmatically control whether it is a value type or a reference type. Discuss
Correct Answer: enum is a value type.
- 10. An enum that is declared inside a class, struct, namespace or interface is treated as public.
Options- A. True
- B. False Discuss
Correct Answer: True
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