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1-
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Which of the following will be the correct output for the C#.NET program given below?
namespace IndiabixConsoleApplication
{
struct Sample
{
public int i;
}
class MyProgram
{
static void Main(string[] args)
{
Sample x = new Sample();
x.i = 10;
fun(ref x);
Console.Write(x.i + " ");
}
public static void fun(ref Sample y)
{
y.i = 20;
Console.Write(y.i + " ");
}
}
}
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A -
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20 10
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B -
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10 20
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C -
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10 10
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D -
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20 20
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2-
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Which of the following statements is correct?
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A -
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A struct never declares a default constructor.
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B -
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All value types in C# inherently derive from ValueType, which inherits from Object.
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C -
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A struct never declares a default destructor.
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D -
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In C#, classes and structs are semantically same.
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3-
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Which of the following statements are correct about the structure declaration given below?
struct Book
{
private String name;
protected int totalpages;
public Single price;
public void Showdata()
{
Console.WriteLine(name + " " + totalpages + " " + price);
}
Book()
{
name = " ";
totalpages = 0;
price = 0.0f;
}
}
Book b = new Book();
- We cannot declare the access modifier of totalpages as protected.
- We cannot declare the access modifier of name as private.
- We cannot define a zero-argument constructor inside a structure.
- We cannot declare the access modifier of price as public.
- We can define a Showdata() method inside a structure.
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A -
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1, 2
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B -
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1, 3, 5
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C -
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2, 4
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D -
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3, 4, 5
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4-
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Which of the following are true about classes and struct?
- A class is a reference type, whereas a struct is a value type.
- Objects are created using new, whereas structure variables can be created either using new or without using new.
- A structure variable will always be created slower than an object.
- A structure variable will die when it goes out of scope.
- An object will die when it goes out of scope.
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A -
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1, 2, 4
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B -
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3, 5
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C -
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2, 4
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D -
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3, 4, 5
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5-
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Which of the following will be the correct output for the program given below?
namespace IndiabixConsoleApplication
{
struct Sample
{
public int i;
}
class MyProgram
{
static void Main(string[] args)
{
Sample x = new Sample();
Sample y;
x.i = 9;
y = x;
y.i = 5;
Console.WriteLine(x.i + " " + y.i);
}
}
}
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A -
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9 9
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B -
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9 5
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C -
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5 5
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D -
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5 9
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6-
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Which of the following statements are correct about Structures used in C#.NET?
- A Structure can be declared within a procedure.
- Structs can implement an interface but they cannot inherit from another struct.
- struct members cannot be declared as protected.
- A Structure can be empty.
- It is an error to initialize an instance field in a struct.
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A -
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1, 2, 4
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B -
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2, 3, 5
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C -
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2, 4
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D -
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1, 3
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7-
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Which of the following statements are correct about an enum used inC#.NET?
- By default the first enumerator has the value equal to the number of elements present in the list.
- The value of each successive enumerator is decreased by 1.
- An enumerator contains white space in its name.
- A variable cannot be assigned to an enum element.
- Values of enum elements cannot be populated from a database.
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A -
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1, 2
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B -
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3, 4
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C -
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4, 5
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D -
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1, 4
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8-
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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
}
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A -
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Variables cannot be assigned to enum elements.
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B -
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Variables can be assigned to any one of the enum elements.
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C -
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Variables can be assigned only to the first enum element.
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D -
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Values assigned to enum elements must always be successive values.
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9-
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Which of the following statements is true about an enum used in C#.NET?
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A -
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An implicit cast is needed to convert from enum type to an integral type.
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B -
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An enum variable cannot have a public access modifier.
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C -
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An enum variable cannot have a private access modifier.
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D -
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An enum variable can be defined inside a class or a namespace.
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10-
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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);
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A -
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1
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B -
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-1
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C -
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red
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D -
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0
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