Csharp.Net - ASP.NET (MCQ) questions and answers

ANSWER: It runs automatically

Explanation:
We create the object, use it and generally forget to delete. Garbage collector is automatic memory management process that releases the memory used by the objects. Garbage collector runs automatically and it checks for objects in the managed heap that are no longer being used by the application and performs the necessary action to regain memory.
It allows us to develop an application without having worry to free memory.

ANSWER: Finally blocks run whether or not exception occurs.

Explanation:
The finally block always executes whether exception occurs or not. Finally block run when control leaves a try statement. You can write all cleanup code in finally block.

Example:
class Program
{
staticint a = 10, b = 0, c;
static void Main(string[] args)
{

try
{
c = a / b;
}
finally
{
Console.WriteLine(c);
}

}
}

ANSWER: All of the above

Explanation:
No explanation is available for this question!

ANSWER: System.Drawing.Point

Explanation:
There are two types are available in C#. Value Type and Reference Type. Value type are allocated on stack and reference types are allocated on managed heap. Predefined datatypes, structures, enums are value types. Class, Sting, Object etc are reference types. In the above example Point is struct so it is value type.

ANSWER: No Limit

Explanation:
There is no limit for number of users to access the data if ReaderWriterLock is applied. By using ReaderWriterLock you can synchronize access to a resource. It allows concurrent read access to multiple users. ReaderWriterLock class is available in System.Threading namespace.

ANSWER: Moniter

Explanation:
By using Moniter class a block of code can be access by one thread at a time. Moniter.Enter() method allows only one thread to access the resource.

Example:
public void ShowNumbers()
{
Monitor.Enter(this);
try
{
for (int i = 0; i < 5; i++)
{
Thread.Sleep(100);
Console.Write(i + ",");
}
Console.WriteLine();
}
finally
{
Monitor.Exit(this);
}
}

ANSWER: ParameterizedThreadStart

Explanation:
ParameterizedThreadStart is a delegate that refers to a method that have single parameter.

Example:
class Program
{
static void Main(string[] args)
{
ParameterizedThreadStartts = new ParameterizedThreadStart(Counting);
Thread obj = new Thread(ts);

obj.Start("careerride");

}
static void Counting(Object obj)
{
stringstr=(string)obj;
Console.WriteLine("Welcome at "+str);
for (int i = 1; i <= 10; i++)
{
Console.WriteLine("Count: {0}", i);
Thread.Sleep(10);
}
}
}

ANSWER: 1, 2

Explanation:
ManagedThreadID and IsBackground are the properties of Thread class.
ManagedThreadID is used to get Gets a unique identifier for the current managed thread.
IsBackground property is used to gets or sets a value to check whether or not a thread is a background thread

ANSWER: WebPermission

Explanation:
No explanation is available for this question!

ANSWER:
<authorization>
<deny users=”ABC”>
<deny users=”?”>
<allow users=”*”>
</authorization>

Explanation:
First you deny user ABC. Then you deny anonymous users access by writing <deny users=”?”>. And last we allow to all other users access. This is proper order of the elements for the requirements of this scenario.