What’s the top .NET class that everything is derived from?

What’s the top .NET class that everything is derived from?
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1 Answer

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System.Object.
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Related questions

What’s the top .NET class that everything is derived from?

Description : What’s the top .NET class that everything is derived from? 

Last Answer : System.Object.

What’s the top .NET class that everything is derived from?

Description : What’s the top .NET class that everything is derived from?

Last Answer : System.Object.

What’s the .NET collection class that allows an element to be accessed using a unique key?

Description : What’s the .NET collection class that allows an element to be accessed using a unique key? 

Last Answer : HashTable. 

What’s the .NET collection class that allows an element to be accessed using a unique key?

Description : What’s the .NET collection class that allows an element to be accessed using a unique key?

Last Answer : HashTable.

How do you enable your application to use .NET base class library members without referencing their fully qualified names?

Description : How do you enable your application to use .NET base class library members without referencing their fully qualified names?

Last Answer : Use the Imports keyword (Visual Basic .NET) or the using keyword (Visual C#) to make a .NET Framework namespace visible to your application. 

What is the role of the DataReader class in ADO.NET connections?

Description : What is the role of the DataReader class in ADO.NET connections?

Last Answer : It returns a read-only, forward-only rowset from the data source. A DataReader provides fast access when a forward-only sequential read is needed.

What is the role of the DataReader class in ADO.NET connections?

Description : What is the role of the DataReader class in ADO.NET connections?

Last Answer : It returns a read-only, forward-only rowset from the data source. A DataReader provides fast access when a forward-only sequential read is needed. 

Which one of the following tools is used to view the metadata information contained in a .NET assembly? Select Answer:  1. al.exe  2. ilasm.exe  3. vbx.exe  4. csc.exe  5. ildasm.exe

Description : Which one of the following tools is used to view the metadata information contained in a .NET assembly? Select Answer:  1. al.exe  2. ilasm.exe  3. vbx.exe  4. csc.exe  5. ildasm.exe

Last Answer :  5. ildasm.exe

In Visual Basic .NET or Visual C# programming, when would you use Structured Query Language (SQL)? How are they executed?

Description : In Visual Basic .NET or Visual C# programming, when would you use Structured Query Language (SQL)? How are they executed? 

Last Answer : ADO.NET handles most of the database communication for you behind-thescenes. You would only use SQL statements when generating ad-hoc queries for the database. You execute SQL statements by ... returning statements, such as DELETE, INSERT INTO, or UPDATE statements, use the ExecuteNonQuery method.

How could you execute DDL commands, such as ALTER or CREATE TABLE, against a database with ADO.NET?

Description : How could you execute DDL commands, such as ALTER or CREATE TABLE, against a database with ADO.NET?

Last Answer : You must use a Command object to execute DDL commands. You can set the CommandType property to Text and enter the appropriate DDL command in the CommandText property. Then call Command.ExecuteNonQuery to execute the command.

Briefly contrast connected and disconnected data access in ADO.NET.

Description : Briefly contrast connected and disconnected data access in ADO.NET.

Last Answer : In ADO.NET, connected data access is available through the DataReader, which is a lightweight class designed to provide very fast and efficient data access. It is severely limited, however, in ... to update the database and keeping the connection open just long enough to execute those commands.

Briefly describe the major components of the .NET Framework and describe what each component does.

Description : Briefly describe the major components of the .NET Framework and describe what each component does.

Last Answer : The .NET Framework consists of two primary parts: the common language runtime, which manages application execution, enforces type safety, and manages memory reclamation, and the .NET base class library, which consists of thousands of predeveloped classes that can be used to build applications.

Option statements that are supported in VB.NET?

Description : Option statements that are supported in VB.NET?

Last Answer : Option Explicit:- By default, Option Explicit is on for VB.NET projects. It's a good programming practice to set Option Explicit on because it helps developers avoid implicitly declaring variables, and thus write ... . It's also a safer way to develop code, which is why most developers prefer it. 

What do you know about .NET assemblies?

Description : What do you know about .NET assemblies?

Last Answer : Answer: Assemblies are the smallest units of versioning and deployment in the .NET application. Assemblies are also the building blocks for programs such as Web services, Windows services, serviced components, and .NET remoting applications.

What is purpose of Assembly Linker or define SDK Tool in .NET Framework?

Description : What is purpose of Assembly Linker or define SDK Tool in .NET Framework?

Last Answer : Answer: In .NET whole the working should be with the helps of DLLs.So all of Visual Studio .Net compilers gernate assemblies or u can say dll.If we want to create an assembly with ... Studio .Net .This multi file can contain modules that are written in diffrenet langauage in one application.

What size is a .NET object?

Description : What size is a .NET object?

Last Answer : Each instance of a reference type has two fields maintained by the runtime - a method table pointer and a sync block. These are 4 bytes each on a 32-bit system, making a total of 8 bytes ... bytes, even for classes with no data (e.g. System.Object). Values types have no equivalent overhead. 

When should you call the garbage collector in .NET?

Description : When should you call the garbage collector in .NET?

Last Answer : As a good rule, you should not call the garbage collector. However, you could call the garbage collector when you are done using a large object (or set of objects) to force the garbage collector to dispose of those very large objects from memory. However, this is usually not a good practice. 

What is the smallest unit of execution in .NET?

Description : What is the smallest unit of execution in .NET?

Last Answer : an Assembly. 

How is the DLL Hell problem solved in .NET?

Description : How is the DLL Hell problem solved in .NET? 

Last Answer : Assembly versioning allows the application to specify not only the library it needs to run (which was available under Win32), but also the version of the assembly.

What are advantages and disadvantages of Microsoft-provided data provider classes in ADO.NET?

Description : What are advantages and disadvantages of Microsoft-provided data provider classes in ADO.NET?

Last Answer : SQLServer.NET data provider is high-speed and robust, but requires SQL Server license purchased from Microsoft. OLE-DB.NET is universal for accessing other sources, like Oracle, DB2, Microsoft Access and Informix. ... on top of the OLE layer, so it's not as fastest and efficient as SqlServer.NET.

How do you debug an ASP.NET Web application?

Description : How do you debug an ASP.NET Web application?

Last Answer : Attach the aspnet_wp.exe process to the DbgClr debugger. 

What debugging tools come with the .NET SDK?

Description : What debugging tools come with the .NET SDK?

Last Answer : 1. CorDBG – command-line debugger. To use CorDbg, you must compile the original C# file using the /debug switch. 2. DbgCLR – graphic debugger. Visual Studio .NET uses the DbgCLR.

When should you call the garbage collector in .NET?

Description : When should you call the garbage collector in .NET?

Last Answer : As a good rule, you should not call the garbage collector. However, you could call the garbage collector when you are done using a large object (or set of objects) to force the garbage collector to dispose of those very large objects from memory. However, this is usually not a good practice.

What is the smallest unit of execution in .NET?

Description : What is the smallest unit of execution in .NET?

Last Answer : an Assembly. 

How is the DLL Hell problem solved in .NET?

Description : How is the DLL Hell problem solved in .NET? 

Last Answer : Assembly versioning allows the application to specify not only the library it needs to run (which was available under Win32), but also the version of the assembly. 

What are advantages and disadvantages of Microsoft-provided data provider classes in ADO.NET?

Description : What are advantages and disadvantages of Microsoft-provided data provider classes in ADO.NET?

Last Answer : SQLServer.NET data provider is high-speed and robust, but requires SQL Server license purchased from Microsoft. OLE-DB.NET is universal for accessing other sources, like Oracle, DB2, Microsoft Access and Informix. ... on top of the OLE layer, so it's not as fastest and efficient as SqlServer.NET.

How do you debug an ASP.NET Web application?

Description : How do you debug an ASP.NET Web application?

Last Answer : Attach the aspnet_wp.exe process to the DbgClr debugger.

What debugging tools come with the .NET SDK?

Description : What debugging tools come with the .NET SDK?

Last Answer : 1. CorDBG – command-line debugger. To use CorDbg, you must compile the original C# file using the /debug switch.   2. DbgCLR – graphic debugger. Visual Studio .NET uses the DbgCLR.

Will we eventually see a .NET Framework-based version of Java as a competitor to C#?

Description : Will we eventually see a .NET Framework-based version of Java as a competitor to C#?

Last Answer : Apparently not. Microsoft will never offer a complete Java environment because Sun has essentially required that Java licensees implement all of Java-something Microsoft will never do. (Why should it? Does ... she's working in a true Java environment because the familiar libraries won't be there. 

But won't most .NET developers eventually choose C# over Visual Basic.NET?

Description : But won't most .NET developers eventually choose C# over Visual Basic.NET? 

Last Answer : No. Because the power of the two languages is so similar, the primary factor for developers migrating to the .NET world will probably be the syntax they prefer. Since many more developers ... the dominant language for building Windows applications five years from now will still be Visual Basic. 

Isn't C# the native language of .NET?

Description : Isn't C# the native language of .NET?

Last Answer : Every language built on the .NET Framework must use the CLR. The CLR defines core language semantics, and so all of the languages built on it tend to have a great deal in common. The biggest choice a . ... just a little bit more-and so neither is the "native" .NET language. There is no such thing.

What’s the difference between the Debug class and Trace class?

Description : What’s the difference between the Debug class and Trace class? 

Last Answer : Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds.

What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Description : What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Last Answer : Value. The data type of the value parameter is defined by whatever data type the property is declared as.

What’s the difference between an interface and abstract class?

Description : What’s the difference between an interface and abstract class?

Last Answer : Answer: An abstract class and Interface both have method only but not have body of method.The difference between Abstract class and An Interface is that if u call Ablstract class then u have to call ... type, Parameter type, Parameter Number all must be same . Only body of method can change. 

What’s an abstract class?

Description : What’s an abstract class?

Last Answer : Answer:Classes that cannot be instantiated. We cannot create an object from such a class for use in our program. We can use an abstract class as a base class, creating new classes that will inherit from ... can inherit from a non-abstract class. In C++, this concept is known as pure virtual method.

What’s the difference between the Debug class and Trace class?

Description : What’s the difference between the Debug class and Trace class? 

Last Answer : Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds.

What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Description : What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Last Answer : Value. The data type of the value parameter is defined by whatever data type the property is declared as.

What’s an abstract class?

Description : What’s an abstract class?

Last Answer : A class that cannot be instantiated. An abstract class is a class that must be inherited and have the methods overridden. An abstract class is essentially a blueprint for a class without any implementation.

What’s an interface class?

Description : What’s an interface class? 

Last Answer : It’s an abstract class with public abstract methods all of which must be implemented in the inherited classes.

What’s an abstract class?

Description : What’s an abstract class? 

Last Answer : A class that cannot be instantiated. A concept in C++ known as pure virtual method. A class that must be inherited and have the methods over-ridden. Essentially, it’s a blueprint for a class without any implementation.

What’s the implicit name of the parameter that gets passed into the class’ set method?

Description : What’s the implicit name of the parameter that gets passed into the class’ set method?

Last Answer : Value, and it’s datatype depends on whatever variable we’re changing. 

Describe an abstract class and explain when one might be useful.

Description : Describe an abstract class and explain when one might be useful.

Last Answer : An abstract class is a class that cannot be instantiated but must be inherited. It can contain both implemented methods and abstract methods, which must be implemented in an inheriting class. ... common interface for other methods, and leave more detailed implementation up to the inheriting class.

Briefly describe how a class is similar to a structure. How are they different?

Description : Briefly describe how a class is similar to a structure. How are they different?

Last Answer : Both classes and structures can have members such as methods, properties, and fields, both use a constructor for initialization, and both inherit from System.Object. Both classes and structures can be ... are value types, and the memory that holds structure instances is allocated on the stack. 

Do you need to instantiate a class before accessing a Shared (static) member? Why or why not?

Description : Do you need to instantiate a class before accessing a Shared (static) member? Why or why not?

Last Answer : Because a Shared (static) member belongs to the type rather than to any instance of the type, you can access the member without first creating an instance of the type.

what is Class ?

Description : what is Class ?

Last Answer : Answer:A group of objects that share a common definition and that therefore share common properties, operations, and behavior. A user-defined type that is defined with the class-key 'class,' 'struct, ... one class to be an expansion of another, and classes can restrict access to their members. 

How do you specify a custom attribute for the entire assembly (rather than for a class) ?

Description : How do you specify a custom attribute for the entire assembly (rather than for a class) ?

Last Answer : Answer: Global attributes must appear after any top-level using clauses and before the first type or namespace declarations. An example of this is as follows: using System; [assembly : ... that in an IDE-created project, by convention, these attributes are placed in AssemblyInfo.cs.

If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor?

Description : If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor?

Last Answer : Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class.

What is the difference between a Struct and a Class?

Description : What is the difference between a Struct and a Class? 

Last Answer : Structs are value-type variables and are thus saved on the stack, additional overhead but faster retrieval. Another difference is that structs cannot inherit.

What is an interface class?

Description : What is an interface class?

Last Answer : Interfaces, like classes, define a set of properties, methods, and events. But unlike classes, interfaces do not provide implementation. They are implemented by classes, and defined as separate entities from classes. 

When do you absolutely have to declare a class as abstract?

Description : When do you absolutely have to declare a class as abstract?

Last Answer : 1. When the class itself is inherited from an abstract class, but not all base abstract methods have been overridden. 2. When at least one of the methods in the class is abstract.