ASP.NET Test - 10

ANSWER: HybridDictionary class

Explanation:
HybridDictionary classes optimized for key-based item retrieval from both small and large collections. If the numbers of items are less then it works as ListDictionary and only when the list becomes too large it converts automatically into a Hashtable internally.
If you do not know how large your collection is, then HybridDictionary class should be used.

ANSWER: System.UInt16

Explanation:
The maximum value of System.UInt16 is 65535 so you can store more than this value.

ANSWER: All of the above

Explanation:
HashTable, SortedList, NameValueCollection are dictionary objects because it store data in key-value form.

Example:
Hashtableht = new Hashtable();
ht["CompId"] = "1";
ht["CompName"] = "CareerRide";
foreach (DictionaryEntryob in ht)
{
Console.WriteLine(ob.Key+" : "+ob.Value);
}

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.

ANSWER: WebPermission

Explanation:
No explanation is available for this question!

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: 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: 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: 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: 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: All of the above

Explanation:
No explanation is available for this question!

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: 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: 1, 2

Explanation:
AJAX is a platform-independent technology that works with Web applications. Ajax (Asynchronous JavaScript And XML) enables your client - side web pages to exchange data with the server through asynchronous calls. By using AJAX you can create flicker - free pages that enable you to refresh partial page without a full reload and without affecting other parts of the page.

ANSWER: ScriptManager

Explanation:
ScriptManager control is required for every page that have AJAX Extensions for ASP.NET The ScriptManager control manages the communication between the client page and the server.You can directly drag and drop this control on content page. It does not have a visual representation. It only used to manage AJAX processing. You cannot use more than one ScriptManager control on single web page.

<asp: ScriptManager ID=" ScriptManager1 " runat=" server ">
</asp: ScriptManager>

ANSWER: Add an AsyncPostBackTrigger control to the Triggers section of the UpdatePanel. Set the ControlID attribute of the AsyncPostBackTrigger control to the ID of the Button control.

Explanation:
To connect a control that is outside an UpdatePanel and you want that this outside control should trigger the update then you should register it as an asyncPostBackTrigger in the Triggers section of the UpdatePanel markup.

<asp:UpdatePanel ID="UpdatePanelVendors" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>

ANSWER: Page.ClientScript.RegisterClientScriptBlock

Explanation:
Page.ClientScript.RegisterClientScriptBlock method is used to dynamically register client script from code.

ANSWER: IScriptManager

Explanation:
No explanation is available for this question!

ANSWER: 1, 2

Explanation:
jQuery is java script library that works on client side. By using jQuery it is much easier to use JavaScript on your website.
The main feature of jQuery is as follows

• HTML / DOM manipulation
• CSS manipulation
• HTML event methods
• Animations
• AJAX

ANSWER: In an encrypted application configuration file

Explanation:
If your connection string contains sensitive information then encrypted application configuration file by using RsaProtectedConfigurationProvider:

ANSWER: Using Integrated Security (Windows Authentication)

Explanation:
No explanation is available for this question!

ANSWER: Evidence,Permission

Explanation:
Code access security consists of the following elements:

• permissions
• permission sets
• code groups
• evidence
• policy

ANSWER: Command line tool & Code access security policy tool

Explanation:
Caspol is command line code access security policy tool. By using this tool administrator can modify security policy for the following level.

Machine policy level.
User policy level.
Enterprise policy level.

ANSWER: The SqlClient data provider.

Explanation:
The SqlClient data provider gives the maximum performance from a connection to SQL Server.
Data provider works as a bridge between an application and a data source.SQL Server.NET Data Provider available in the System.Data.SqlClient namespace.

ANSWER: TableSchema

Explanation:
The TableSchema value is wrong because it is not a CommandType enumeration value.

ANSWER: ExecuteScalar

Explanation:
EecuteScalar method of SqlCommand object returns the value of the first column of the first row from a table.
The common methods of command abject are as follows.

• ExecuteReader: This method works on select SQL query. It returns the DataReader object. Use DataReader read () method to retrieve the rows.
• ExecuteScalar: This method returns single value. Its return type is Object.If you call ExecuteScalar method with a SQL statement that returns rows of data, the query returns only the first column of the first row.
• ExecuteNonQuery: If you are using Insert, Update or Delete SQL statement then use this method. Its return type is Integer (The number of affected records).

ANSWER: ExecuteNonQuery

Explanation:
EecuteScalar method of SqlCommand object returns the value of the first column of the first row from a table.
The common methods of command abject are as follows.

• ExecuteReader: This method works on select SQL query. It returns the DataReader object. Use DataReader read () method to retrieve the rows.
• ExecuteScalar: This method returns single value. Its return type is Object.If you call ExecuteScalar method with a SQL statement that returns rows of data, the query returns only the first column of the first row.
• ExecuteNonQuery: If you are using Insert, Update or Delete SQL statement then use this method. Its return type is Integer (The number of affected records).

ANSWER: 2, 3

Explanation:
OleDbConnection object is used to connect to SQL Server 6.x or later. It is also used to connect with access database.
Example of connection string.
Provider = Microsoft.ACE.OLEDB.12.0;
Data Source = C:\myFolder\myAccessFile.accdb;
Persist Security Info = False;

ANSWER: 1, 4

Explanation:
A valid data source, appropriate credentials or Integrated Security settings needed by a connection string to open a connection to a SQL Server 2000 or SQL Server 2005 database.
Example:
String conString = "Data Source = PC name; Initial Catalog = your DataBasename;
Integrated Security = SSPI;"

ANSWER: 2, 3, 4

Explanation:
When you call close method of a connection objectStateChange event is fired, non - committed pending transactions are rolled back and connection is returned to the connection pool.