VB(Visual Basic) .Net Quiz
| Description: VB(Visual Basic) .Net Quiz | |
| Number of Questions: 13 | |
| Created by: Aliensbrain Bot | |
| Tags: .net vb |
Where do you find COMException class
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System.Runtime.Interopservices
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System.XML
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System. Data
Which method of the XMLdocument class takes xml as string while loading
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Loadxml ( )
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Load( )
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Save ( )
Which is the base class for TypedDataset
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DataReader
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Dataset
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DataAdapter
To answer this question, the user should be familiar with the concept of typed datasets and their relationship to other classes in the .NET framework.
The correct answer is:
B. Dataset
Explanation:
In the .NET framework, the base class for typed datasets is the Dataset class. A typed dataset is a dataset that is derived from the Dataset class and includes additional features such as strongly-typed data tables and data columns.
A. DataReader is not the base class for TypedDataset. The DataReader class is used for reading data from a database and does not have a direct relationship to typed datasets.
C. DataAdapter is also not the base class for TypedDataset. The DataAdapter class is used for retrieving and updating data from a database, but it is not the base class for typed datasets.
Therefore, the correct answer is B. Dataset.
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Data Set
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Typed Data Set
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DataReader
The DataAdapter uses which of the following object to retrieve the data from database
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Connection
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Command
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DataReader
AI Explanation
To answer this question, we need to understand the purpose of the DataAdapter and its relationship with other objects involved in retrieving data from a database.
The DataAdapter is a part of the ADO.NET framework and is used to retrieve data from a database and populate a DataTable or a DataSet. It acts as a bridge between the database and the application.
The DataAdapter uses the following objects to retrieve data from the database:
A. Connection - The Connection object is responsible for establishing a connection to the database. It provides the necessary information, such as the database server name, credentials, and other connection parameters. The DataAdapter requires a Connection object to establish a connection to the database, but it does not directly use the Connection object to retrieve data.
B. Command - The Command object is used to execute SQL queries or stored procedures against the database. It represents a single command to be executed, such as SELECT, INSERT, UPDATE, or DELETE. The DataAdapter uses the Command object to execute the query or stored procedure and retrieve the data from the database. The Command object can be an instance of the SqlCommand, OleDbCommand, or MySqlCommand classes, depending on the database provider being used.
C. DataReader - The DataReader object provides a fast, forward-only, read-only access to the data retrieved from the database. Unlike the DataAdapter, the DataReader is used for retrieving data row by row, typically when you need to iterate over a large result set. The DataReader is not used directly by the DataAdapter to retrieve data.
Therefore, the correct answer is B. The DataAdapter uses the Command object to retrieve data from the database by executing SQL queries or stored procedures.
Which of the method is used to display the form as modal
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Showdialog( )
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Activate ( )
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Loaddialog()
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Show( )
The tool provided with .Net framework to register assemblies for use by COM is
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Regsvr32
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Regasm
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ILDASM
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Regedit
AI Explanation
To answer this question, you need to understand the .NET framework and its integration with COM (Component Object Model).
The correct answer is B) Regasm.
Regasm (Registration Assembly) is the tool provided with the .NET framework to register assemblies for use by COM. It is used to register a .NET assembly as a COM component. This allows the .NET assembly to be accessed and used by COM clients.
Option A) Regsvr32 is not the correct answer. Regsvr32 is a tool used to register and unregister DLL files in the Windows operating system, but it is not specifically used for registering .NET assemblies for use by COM.
Option C) ILDASM (IL Disassembler) is a tool used to view the Intermediate Language (IL) code of a .NET assembly, but it is not used for registering assemblies for use by COM.
Option D) Regedit is a Windows registry editor tool. It is not specifically used for registering .NET assemblies for use by COM.
Therefore, the correct answer is B) Regasm.
How do you add Web Methods in VB.Net
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Add keyword to Method signature
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Add [WebMethod] on top of the Method Signature
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Add {WebMethod} on top of the Method Signature
How do you refer the current class in VB.Net
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Me
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This
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Super
To refer to the current class in VB.Net, you would use the "Me" keyword.
A. Me: This option is correct. In VB.Net, "Me" is a keyword that represents the current instance of the class. It can be used to access the members and properties of the current class.
B. This: This option is incorrect. In VB.Net, "This" is not used to refer to the current class. Instead, "This" is used in other programming languages like C# to refer to the current instance of a class.
C. Super: This option is incorrect. In VB.Net, "Super" is not used to refer to the current class. Instead, "Super" is used in other programming languages like Java to refer to the superclass or base class.
The Answer is: A. Me
How you refer the parent class in VB.Net
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Parent
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MyBase
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Super
To refer to the parent class in VB.Net, we use the keyword "MyBase". Therefore, the correct answer is:
The Answer is: B. MyBase
The serialization of an Object means that it is written out to a stream
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True
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False
Which of the following is not a method of Debug class
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Assert( )
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Open()
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Flush( )
To solve this question, the user needs to have knowledge about the Debug class and its methods.
The Debug class is a class in C# that provides a set of methods, properties, and events to assist in debugging applications. It is mainly used for debugging purposes, such as tracing, logging, and error handling.
Now, let's go through each option and explain why it is right or wrong:
A. Assert( ): This is a method of the Debug class, which is used to check whether a condition is true or false. If the condition is false, it will stop the execution of the program and display an error message. Therefore, option A is not the correct answer.
B. Open(): This method is not a part of the Debug class. It is a method of the File class, which is used to open a file in the specified mode. Therefore, option B is the correct answer.
C. Flush( ): This is a method of the Debug class, which is used to clear the output buffer and send any pending messages to the listeners. Therefore, option C is not the correct answer.
The Answer is: B