VB.Net, also known as Visual Basic Net, is a computer programming language established by Microsoft. It is meant to support the elements of object-oriented programming language. It includes encapsulation, inheritance, abstraction, and polymorphism. The quintessential part about this language is that it was curated keeping freshers and expertise in mind. Hence, you can establish an object-oriented language similar to Java or C++. The other feature is that languages written with Vb.Net can also interoperate with programs based on Visual C++, Visual C#, or Visual J#.
If you want to bring in Visual Basic Net in an everyday job style and become an expert, then you’re at the right place. Look at some VB.Net Interview Questions that can help you crack your interview.
Top VB.Net Interview Questions and Answers
1. State the difference between Vb and Vb.Net.
Vb- Vb is considered to be platform dependent and is backward compatible. It can’t develop multi-threaded applications and can do exception handling by ‘On Error…Goto’.
Vb.Net- Vb.Net is platform-independent and is capable of building multi-threaded applications. It is not backward compatible and has exception handling by ‘Try…Catch’.
2. Define Namespace.
It is considered a more aligned way of highlighting Classes, Structures, and interfaces included in the .NET language. It is hierarchically structured and available to all the .NET Languages.
3. Define NameSpaces used for accessing the data.
One can use System. Data namespace for accessing and managing data from the respective source. The primary use of this Namespace is to deal with the data only from the specified database.
4. What do you mean by JIT?
JIT, known as Just In Time Compiler, can be used as a runtime execution environment. One can identify three types of JIT-
- Pre-JIT- It is compiled at the deployment stage of an application.
- Econo- JIT- It calls methods at runtime.
- Normal JIT- It compiles and calls a method at runtime, which gets compiled instantly when called.
5. How do you define assembly and its usage of it?
Assembly is considered one of the elements of the .NET application. It is also known as the primary unit among all .NET Applications. It can be identified as DLL or Executable File.
6. What are the different types of assembly?
Assembly can be identified into two types- Private and Public
Private- It is used by a single application and can be stored in the application’s directory.
Public: This is stored in Global Assembly Cache (GAC) and can be shared by several applications.
7. State the difference between Namespace and Assembly?
Assembly is considered the physical grouping of all the units. However, Namespace is known for logically grouping the classes. The Namespace can have multiple assemblies, unlike assembly.
8. How do you define the INTERNAL keyword?
INTERNAL is known as one of the access specifiers. It is usually visible in a given assembly known as DLL File. It accumulates a single binary component and can be figured out throughout the assembly.
9. Define Option Strict?
Option Strict Keyword saves data from getting lost while the implicit data gets converted. It ensures compile time notification of such types of conversions.
10. How do you define Option Explicit?
It is the keyword used in a file to declare all the variables. This can be done using declared keywords like Dim, Public, Private and Protected.
11. Mention the use of New Keyword?
New Keyword can be used either as a modifier or an operator along with the constructor. It can hide inherited members from the base class if used as a modifier. However, it is efficient for creating an object to invoke constructors if used as an operator.
12. What is a Jagged Array?
A jagged Array is defined as an array of arrays. Every Array entry is considered another array capable of holding an end number of items.
13. How do you Manifest?
It is a text file that can store metadata info of .NET assemblies. The file that includes Manifest can be saved as type PE. Be it Assembly Name, Version, Culture, or Keytoken- these can be saved as a Manifest.
14. Define the difference between Dispose and Finalize()?
Garbage Collector considers the finalize method to keep us free from unmanageable resources. Some of the resources are managed by iDisposable Interface. Those resources are window handles and database connections.
Dispose the iDisposable Interface controls method. It is used to release unused resources.
15. Define Garbage Collection?
This is also considered automatic memory management. It is utilized for the automatic recycling of allocated memory. This collection is performed by a Garbage collector that is capable of recycling the memory if it is unused.
16. Identify the types of generations in Garbage Collector?
One can identify three types of generations in the Garbage Collector.
Generation 0: It is considered a newly curated object, never marked for collection.
Generation 1: The one marked as a collection but not evaded.
Generation 2: One that has survived more than one sweep of the overall Garbage Collector.
17. How do we use Option Explicit?
If the Option Explicit is ON, then the Variable should be declared. However, if it is OFF, all the variables can be used without declaration.
18. Define the difference between int and int32?
Int32 is defined as a 32-bit signed integer. It is not considered a keyword in VB.Net.
19. Define Hashtable?
It is a set of items with key and value pairs. Keys are known as indexes. One can quickly search for values if done rightly through the keys.
20. Define Deep Copy?
It is known as curtains a new object and then copying the non-static fields of the present object to a new one.
21. How can one store decimal data in .NET?
One can use BinaryWriter to store the decimal data in .NET.
22. Define strong typing and weak typing?
Strong type is used to check the types of variables when compiling. However, the Weak type is used to check the types of Systems at a later stage which is also the run time.
23. State the number of classes that DLL can contain?
DLL can contain the end number of classes.
24. State the difference between thread and process?
One can use Thread to execute more than one program in a particular period. However, Process executes one program at a time.
25. Define the two significant parts of .NET?
The two main parts of .NET are Common Language Runtime (CLR) and .NET Framework Class Library.
26. State the languages supported by .NET?
27. Define Serialization in .Net?
It is the process of converting an object to a stream of bytes. It is mainly used to transport objects.
28. Define CLS?
CLS is known as Common Language Specification, a subset of CTS. It is utilized to unite all the languages under one umbrella.
29. How do you define CTS?
It is known as the Common Type System used to communicate efficiently between the languages.
30. Specify the difference between Value and Reference Type?
Value is allocated to the stack and directly stores the data. Reference Type preserves a reference to the value’s memory address. It is earmarked to the heap.
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