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VB.Net Materials-Free Download



30. What is TRACE in VB.Net?

TRACE allows the user to view how the code has been executed in detail. This tells how the code is working.

31. What is Authentication and Authorization?

Authentication is the process of obtaining credentials from the users and verifying the user’s identity. Authorization is the process of giving access to the authenticated resources. Authentication leads to Authorization. 

32. What are the types of Authentication?

There are three types of Authentication and they are –

• Windows Authentication

• Forms Authentication

• Passport Authentication

33. What is Global Assembly Cache (GAC)?

GAC is used where shared .NET assembly resides. It is used in the following criteria:

• If .Net assembly has special security requirements

• If .Net application has to be shared with other applications

34. What is CLR?

CLR is abbreviated as Common Language Runtime and it forms heart of the .NET framework. It is the responsibility of runtime to take care of the code execution of the program. CLR takes care of the following: 

• Garbage Collection

• Code Verification

• Code Access Security

• IL (Intermediate Language) 35. What is CTS?

CTS is Common Type System which is used to communicate smoothly between the languages. For example, if VB has Integer data type and C++ has long data type and these data types are not compatible. 

In order to be compatible, CTS can be used as an interface between two languages.

36. What is CLS?

Common Language Specification is a subset of CTS and it is used to unite all languages in to one umbrella. This extends to support all the .NET language into one unit. 

37. What is Managed code?

Managed Code is used to run inside the CLR environment and it is called as .NET run time. All Intermediate Language (IL) are set to be Managed code. 

38. What is serialization in .Net?

Serialization is defined as a process of converting an object to stream of bytes. This is used mainly to transport objects.

39. How many languages are supported by .Net?

Following are the languages supported by VB.Net:

• C#

• VB.Net

• COBOL

• Perl

40. What is the difference between Convert.tostring and i.tostring method?

Convert.tostring handles Null and i.tostring does not handle null.

41. What are the two main parts of .NET?

They are – Common Language Runtime (CLR) and .NET Framework class library.

42. What is the difference between thread and process?

Thread is used to execute more than one program at a time. Whereas, Process executes single program at a time.

43. What is strong typing and weak typing?

Strong type is checking the types of variables at compile time and weak type is checking the types of system as late as possible which is nothing but run time. 

44. How many .NET languages can a single .NET DLL contain?

Only one language will be supported by one DLL.

45. What is the class that allows an element to be accessed using Unique key?

Hash table is the collection class that allows an element to be accessed using Unique key.

46. What is Code Security?

.NET framework provides security features to secure code from unauthorized users. There are two types of security in .NET:

• Role based security – Authorizes User

• Code access security – Protects system resources from unauthorized calls

47. Which DLL Is used for Microsoft .NET run time?

Mscoree.dll is used for Microsoft .NET runtime DLL.

48. How many classes a DLL can contain?

Unlimited number of classes can be present in a DLL.

49. How can we store decimal data in .NET?

BinaryWriter is used to store decimal data in .NET.

50. What is deep copy?

Deep copy is nothing but creating a new object and then copying the non-static fields of the current object to new object.

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