Daily Tips- Tip #10 - How to disable browser's back button using javascript?

Wednesday, July 15, 2009

Actually you cant disable the browser's back button, but if you are navigating between 2 pages , then you can give this functionality between them. You have to give the code in the following in the 1st page.
You can do that in 2 ways, they are:

1. <body onLoad="history.go(+1)">

2. function noBack(){window.history.forward()}
noBack();
window.onload=noBack;

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What are PDB files? Where must they be located for debugging to work?

What are PDB files?
A program database (PDB) file holds debugging and project state information that allows incremental linking of a Debug configuration of your program.

Where must they be located for debugging to work?
You must deploy your PDB symbols to either the directory with the image or the directory where the symbols were originally built.

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What is a nullable Type? How to assign a default value to it? Are nested nullable types allowed?

What are nullable types?
Nullable types are those which can represent a null in addition to the normal range of values. It is an instance of System.Nullable.

How to assign a default value to it?
Use the ?? operator to assign a default value when it is assigned to a non-nullable type.
Ex:
int? empid=null;
int tempid= empid ?? 1;

Are nested nullable types allowed?
No.

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What is the Difference between imperative and interrogative code?

Interrogative:
Those statements which return values to the calling code are called Interrogative code.

Imperative:
Those statements which does not return values to the calling code are called imperative code.

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What is the use of Checked and UnChecked operators?

They are used to control the overflow checking context for integral-type arithmetic operations and conversions.

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What is a Resource File ? or What is a resx file ?

A resource file is an XML file which specify objects and strings inside XML tags.

For More Information see the following link,

http://msdn.microsoft.com/en-us/library/ekyft91f(VS.80).aspx

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Is it possible to extend a struct?

No.

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Is it possible to implement an interface to a structure?

Yes.

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What is the control which can be used to reserve the space on web page for storing localized data?

It is a Localize control. It is a Literal control and it is used when you want to display localized text in a specific area on the page.

Ex:
<asp:Localize ID="Localize1" runat="server"></asp:Localize>

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What are the Magic Tables in Sql server?

There are 2 magic table in sql server, they are:
1. Inserted
2. Deleted

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What is an IIS metabase ?

It is a repository for most of the Internet Information Services (IIS) configuration values. It is a XML file and can be edited manually or programmatically.

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How will you do an IIS backup/restore?

By clicking Action > Backup/Restore Configuration , and then giving the backup name.
Simillarly for Restore.

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what are IIS Host headers?

IIS allows you to assign any number of sites to a single IP address and distinguish them by using host headers.

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Where are the IIS log files stored?

By default, IIS log files are stored in the :\WINNT\system32\LogFiles\W3SVC# folder of the system running IIS.

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What is the difference between managed and unmanaged code?

Managed Code:

Any code that runs under the CLR (common Language Runtime) is a managed code.

UnManaged Code:

Any code that is not running under the CLR is an unmanaged code.

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If you want to restrict a user from entering non-numeric characters in a textbox, which event will you use?

You can use the following three events, but keypress is more effective,ie it will act even before the character appears in the text box.

1. keydown
2. keypress
3. keyup

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What Is Kerberos?

Kerberos is a type of an authentication protocol which is created my Massachusetts Institute of Technology (MIT) which helps users to communicate through an insecure network by proving their identity to one another.

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What is impersonation in ASP.NET?

Impersonation is when ASP.NET executes code in the context of an authenticated and authorized client.
Impersonation can significantly affect performance and scaling. It is generally more expensive to impersonate a client on a call than to make the call directly.

Ex:
<identity impersonate="true"
userName="domain\user"
password="password" />

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What’s the use of SmartNavigation property?

SmartNavigation property is deprecated from .net2.0 onwards. Use the SetFocus method and the MaintainScrollPositionOnPostback property instead.

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What is Reflection? What namespace is used for it? Explain with an example.

Reflection is a mechanism using which you can get the details about .NET assemblies at runtime. The namespace used for Reflection is System.Reflection.

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What is the namespace which manages Viewstate of Asp.net server controls?

System.Web.UI.StateBag

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What is strong-typing versus weak-typing?

Strong Typing : Checks the type of variables at compile time
Weak Typying : checks the type of variables at Run time.

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How many classes can a single .NET DLL contain?

Unlimited.

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A good site for Testers.

http://art-of-testing.blogspot.com/

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Load and Stress Testing

A website which does Web Application Load and Stress Testing,

www.neotys.com

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A website which gives the country-wise visitor count

A website which gives the country-wise visitor count with the flags of the countries being displayed.

www.flagcounter.com

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A good site for Testers.

http://art-of-testing.blogspot.com/

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A website which does Web Application Load and Stress Testing

A website which does Web Application Load and Stress Testing,

www.neotys.com

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What is App Pool in IIS ?

An application pool is a group of one or more URLs that are served by a worker process or set of worker processes. Any Web directory or virtual directory can be assigned to an application pool.

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what are the Differences between Panel and GroupBox in asp.net ?

Sno	GroupBox	Panel
1	Has a visible caption	No
2	Always displays a border	Border is determined by BorderStyle Property.
3	Doesnot support scrolling	Enables automatic scrolling using AutoScroll property.

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What is the use of the Assert Method?

Debug.Assert checks for a condition and displays a message if the condition is false.

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Can two different Languages be used in a single .aspx page?

No.

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How to find the .NET version i am using through code?

Response.Write(System.Environment.Version.ToString());

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What are the different types of JITs in .NET ?

There are 3 types of JITs in .NET, they are

1. Pre-JIT (Compiles entire code into native code at one stretch)
2. Ecno-JIT (Compiles code part by part freeing when required)
3. Normal JIT (Compiles only that part of code when called and places in cache)

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Can we use multiple ScriptManagers on a page?

No.

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Can a static class be instantiated ?

No.

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Can a static class contain non static members?

No.

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How many types of CommandType options are there in Command object of ADO.NET?

There are 3 types of CommandType in Command object of ADO.NET. They are :

1. CommandType.Text
2. CommandType.TableDirect
3. CommandType.StoredProcedure

1. CommandType.Text:
Should be used when you pass a TSQL statement(select,insert,update,etc).

2. CommandType.TableDirect
You will specify the name of the table from which you want the records.

3. CommandType.StoredProcedure
Is used when you pass the name of a stored procedure.

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How many types of Execute methods are there in ADO.NET's Command Object?

There are 4 types of Execute Methods ADO.NET's Command Object. They are :

1. ExecuteNonQuery();
2. ExecuteReader();
3. ExecuteScalar();
4. ExecuteXmlReader();

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Can you store multiple data types in a System.Array?

No.

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Which .NET type maps to the C# keyword 'int' ?

System.Int32;

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What are the different methods to deploy an Assembly?

MSI Installer, a CAB archive, XCOPY command.

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What is the smallest unit of execution in .NET?

Assembly.

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What is the name of technique used to convert a value-type to a reference-type ?

Boxing.

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What is default modifier for an Interface ?

public.

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What is the default modifier for a Class?

private.

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What is Default Authentication in ASP.NET?

Windows.

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Can we inherit a static class ?

No.

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What is default time duration for a session?

20 seconds.

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Daily Tips- Tip #9 - How to enable javascript debugging in Visual Studio IDE?

You need to do 2 things for that.

1. Write debugger statement at the line from where you want to debug.
2. Enable javascript debugging in the browser property settings.

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What are Attribute? What is the use of it? What are the types?

Attributes is feature using which you can add metadata to your classes. Metadata means giving declarative information about your classes, methods,etc.

Types:
1. Intrinsic
2. Custom

1. Intrinsic
The belong to .NET CLR.
2. Custom
They are the attributes developed the developer.

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Wednesday, July 15, 2009

Interrogative:Those statements which return values to the calling code are called Interrogative code.Imperative:Those statements which does not return values to the calling code are called imperative code.

They are used to control the overflow checking context for integral-type arithmetic operations and conversions.

A resource file is an XML file which specify objects and strings inside XML tags.For More Information see the following link, http://msdn.microsoft.com/en-us/library/ekyft91f(VS.80).aspx

No.

Yes.

It is a Localize control. It is a Literal control and it is used when you want to display localized text in a specific area on the page.Ex: <asp:Localize ID="Localize1" runat="server"></asp:Localize>

There are 2 magic table in sql server, they are:1. Inserted2. Deleted

It is a repository for most of the Internet Information Services (IIS) configuration values. It is a XML file and can be edited manually or programmatically.

By clicking Action > Backup/Restore Configuration , and then giving the backup name.Simillarly for Restore.

IIS allows you to assign any number of sites to a single IP address and distinguish them by using host headers.

By default, IIS log files are stored in the :\WINNT\system32\LogFiles\W3SVC# folder of the system running IIS.

Managed Code: Any code that runs under the CLR (common Language Runtime) is a managed code.UnManaged Code: Any code that is not running under the CLR is an unmanaged code.

You can use the following three events, but keypress is more effective,ie it will act even before the character appears in the text box.1. keydown 2. keypress 3. keyup

Kerberos is a type of an authentication protocol which is created my Massachusetts Institute of Technology (MIT) which helps users to communicate through an insecure network by proving their identity to one another.

SmartNavigation property is deprecated from .net2.0 onwards. Use the SetFocus method and the MaintainScrollPositionOnPostback property instead.

Reflection is a mechanism using which you can get the details about .NET assemblies at runtime. The namespace used for Reflection is System.Reflection.

System.Web.UI.StateBag

Strong Typing : Checks the type of variables at compile timeWeak Typying : checks the type of variables at Run time.

Unlimited.

An application pool is a group of one or more URLs that are served by a worker process or set of worker processes. Any Web directory or virtual directory can be assigned to an application pool.

Debug.Assert checks for a condition and displays a message if the condition is false.

No.

Response.Write(System.Environment.Version.ToString());

There are 3 types of JITs in .NET, they are 1. Pre-JIT (Compiles entire code into native code at one stretch) 2. Ecno-JIT (Compiles code part by part freeing when required) 3. Normal JIT (Compiles only that part of code when called and places in cache)

No.

No.

No.

There are 4 types of Execute Methods ADO.NET's Command Object. They are : 1. ExecuteNonQuery();2. ExecuteReader();3. ExecuteScalar();4. ExecuteXmlReader();

No.

System.Int32;

MSI Installer, a CAB archive, XCOPY command.

Assembly.

Boxing.

public.

private.

Windows.

No.

20 seconds.

You need to do 2 things for that.1. Write debugger statement at the line from where you want to debug.2. Enable javascript debugging in the browser property settings.

Attributes is feature using which you can add metadata to your classes. Metadata means giving declarative information about your classes, methods,etc.Types:1. Intrinsic2. Custom1. Intrinsic The belong to .NET CLR.2. Custom They are the attributes developed the developer.

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Interrogative:
Those statements which return values to the calling code are called Interrogative code.

Imperative:
Those statements which does not return values to the calling code are called imperative code.

A resource file is an XML file which specify objects and strings inside XML tags.

For More Information see the following link,

http://msdn.microsoft.com/en-us/library/ekyft91f(VS.80).aspx

It is a Localize control. It is a Literal control and it is used when you want to display localized text in a specific area on the page.

Ex:
<asp:Localize ID="Localize1" runat="server"></asp:Localize>

There are 2 magic table in sql server, they are:
1. Inserted
2. Deleted

By clicking Action > Backup/Restore Configuration , and then giving the backup name.
Simillarly for Restore.

Managed Code:

Any code that runs under the CLR (common Language Runtime) is a managed code.

UnManaged Code:

Any code that is not running under the CLR is an unmanaged code.

You can use the following three events, but keypress is more effective,ie it will act even before the character appears in the text box.

1. keydown
2. keypress
3. keyup

Strong Typing : Checks the type of variables at compile time
Weak Typying : checks the type of variables at Run time.

There are 3 types of JITs in .NET, they are

1. Pre-JIT (Compiles entire code into native code at one stretch)
2. Ecno-JIT (Compiles code part by part freeing when required)
3. Normal JIT (Compiles only that part of code when called and places in cache)

There are 4 types of Execute Methods ADO.NET's Command Object. They are :

1. ExecuteNonQuery();
2. ExecuteReader();
3. ExecuteScalar();
4. ExecuteXmlReader();

You need to do 2 things for that.

1. Write debugger statement at the line from where you want to debug.
2. Enable javascript debugging in the browser property settings.

Attributes is feature using which you can add metadata to your classes. Metadata means giving declarative information about your classes, methods,etc.

Types:
1. Intrinsic
2. Custom

1. Intrinsic
The belong to .NET CLR.
2. Custom
They are the attributes developed the developer.