C# Test 2

Question 2: What will be the output of the following code?

int i = 5, j;
Console.WriteLine(j=i*2); 

• 0
• 10
• Runtime error
• Compile-time error

Question 3: What will be the output of the following program?

public static void Main()
{
	int k;
	display(k);
}
	
static void display(int val = 0)
{
	Console.Write(val);
}

• null
• 0
• Compile-time error
• Runtime error

Question 4: Which of the following keyword is used to declare a variable whose type will be automatically determined by the compiler?

• dynamic
• var
• this
• null

Question 5: Which of the following data types can include maximum positive or negative, integer or float value?

• double
• long
• decimal
• BigInteger

Question 6: What will be the output of the following program?

public static void Main(string[] args)
{
    int a = 1, b = 2, c = 3;
  
    Console.Write ((a*b)+(b*c));   
    Console.Write ((a*b)+(b*c)-c);   
}

• 8, 5
• 9, 5
• 7,5
• 9,6

Question 7: Which of the following is the default access modifier in a namespace?

• Public
• Private
• Internal
• Protected

Question 8: A constructor in a class can have a return type.

• True
• False

Question 9: What will be the output of the following program?

public static void Main(string[] args)
{
    string str1, str2; 
    str1 = "C#"; 
    str2 = "C#";
		
    Console.Write(Object.ReferenceEquals(str1, str2));
}

• True
• False
• Compile-time error
• Runtime error

Question 10: What will be the output of the following code?

var greet = "Hello ";
var name = "Steve";
Console.WriteLine($"{greet} {name}");

• Hello {name}
• Hello Steve
• {Hello} {Steve}
• Compile-time error

Question 11: What will be the output of the following program?

int i = 0;

for(;;)
{
    if (i < 5)
        Console.Write(i);
    else
        break;
	i++;
}

• 01234
• 12345
• Infinite loop
• Compile-time error

Question 12: The members of the enum are always public, and no access modifiers can be applied.

• True
• False

Question 13: Which of the following is a correct way to initialize an array?

• int[] arr = new int[5];
• int[] arr = new int[]{1, 2, 3, 4, 5};
• var arr = new int[5]{1, 2, 3, 4, 5};
• int[] arr = int[]{1, 2, 3, 4, 5};
• int[] arr = {1, 2, 3, 4, 5};
• var arr = {1, 2, 3, 4, 5};

Question 14: Which of the following statement(s) are TRUE?

• Array is a value type.
• Array is a reference type.
• Array is a primitive type.
• None of the above.

Question 15: What will be the output of the following code?

SortedList sortedList = new SortedList()
                    {
                        {2, true},
                        {1,"one"},
                    };
foreach(DictionaryEntry kvp in sortedList )
    Console.Write(kvp.Value);

• Compile-time error
• Runtime error
• 12
• OneTrue

Question 16: What will be the output of the following program?

public static void Main()
{
	int val = GetVal();
}
	
public static int GetVal(){
	int[] arr = {1, 2, 3, 4, 5};
	try
    {
        return arr[10];
    }
	catch(Exception ex){
        Console.WriteLine("Error occurred!");
	}
	finally{
		return 0;
	}
}

• Error occurred!
• Compile-time error
• No output
• Program terminates unexpectedly

Question 17: What will be the output of the following program?

public static void Main()
{
	int[] arr = {1, 2, 3, 4, 5};
	try{
            Console.Write(arr[10]);
    }
	finally{
		Console.WriteLine("Error occurred!");
	}
}

• Compile-timer error
• Error occurred!
• Unhandled exception. System.IndexOutOfRangeException: Index was outside the bounds of the array.
• No output and program terminates

Question 18: Which of the following statements are TRUE?

• Delegate is a reference type.
• Delegate is a value type.
• Delegate defines the method signature.
• Delegate is pointer type.

Question 19: Which of the following is the built-in delegate function for handling events in .NET?

• public delegate void Action();
• public delegate void Predicate(object sender);
• public delegate void EventHandler(object sender, EventArgs e);
• None of the above.

Question 20: Events can also be declared static, virtual, sealed, and abstract.

• True
• False