php mcq questions with answers


                                

Which of the following statements is correct about the C#.NET code snippet given below?

int a = 10; 
int b = 20; 
int c = 30;
enum color: byte
{
    red = a, 
    green = b,
    blue = c 
}

A.Variables cannot be assigned to enum elements.
B.Variables can be assigned to any one of the enum elements.
C.Variables can be assigned only to the first enum element.
D.Values assigned to enum elements must always be successive values.
E.Values assigned to enum elements must always begin with 0.
                                

Which of the following statements is true about an enum used in C#.NET?

A.An implicit cast is needed to convert from enum type to an integral type.
B.An enum variable cannot have a public access modifier.
C.An enum variable cannot have a private access modifier.
D.An enum variable can be defined inside a class or a namespace.
E.An enum variable cannot have a protected access modifier.
                                

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);

A.1
B.-1
C.red
D.0
E.color.red
                                

Which of the following statements are correct about an enum used inC#.NET?

  1. To use the keyword enum, we should either use [enum] or System.Enum.
  2. enum is a keyword.
  3. Enum is class declared in System.Type namespace.
  4. Enum is a class declared in the current project's root namespace.
  5. Enum is a class declared in System namespace.

A.1, 3
B.2, 4
C.2, 5
D.3, 4
                                

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 );

A.-3, -2, -1
B.-3, 0, 1
C.0, 1, 2
D.red, green, blue
E.color.red, color.green, color.blue