Important dot net interview questions

Software Development | Design, Digital, Technology | Oct 29,2021 | By Nandini S

Everyone should have a thorough grasp of the IT sector since it will have a significant impact on their future employment prospects. This article will address the most frequently asked questions. For an online interview, here are some questions to ask.

1.What is the definition of assembly?

ANS:The.NET application's assembly is a logical unit for deployment and version management. Assemblies are made up of a variety of types and resources that are designed to function together. The.NET Assemblies might take the form of an executable (EXE) or a class library (DLL). The assembly execution environment is provided by CLR.

2.In an assembly, where is the version information stored?

ANS:It is contained inside the manifest.

3.What exactly is MSIL code?

ANS:The Microsoft Intermediate Language Code is what you're looking for. It is a collection of instructions that are CPU-independent and can be effectively transformed into native code. CLR's JIT compiler translates the code to CPU-specific native code before it is run. The compiler produces information for MSIL when it is created. MSIL, when used in conjunction with metadata and CTS, enables genuine cross-language interoperability.

4.What distinguishes Assembly from other programmes?

ANS:Assembly has a number of advantages, including the ones listed below: A file or a collection of distinct modules can be used to assemble anything. Assemblies are the smallest deployment functional unit. They can run on any platform that has the.NET framework installed. Code Access Security is used to regulate the execution of Assemblies.

5.What exactly is ILDASM?

ANS:A utility named ILDASM.exe might be used to view Assembly's content.

6.What are the many kinds of Assembly?

ANS:One or more assemblies make up a.NET application. There are two sorts of assemblies: Private Gathering Assembled together

7.What is the definition of a Private Assembly?

ANS:When the functionality of a component or.dll is uniquely connected with an application, private assemblies are produced. The Application folder, which is the.NET application's bin folder, is where private assemblies are built.

8.What is Shared Assembly, and how does it work?

ANS:Shared Assemblies are class libraries that are shared between programmes. System.winform.dll, for example, offers GUI functionality for all.NET-based windows programmes.

9.What exactly is GAC?

ANS:This is one of the most commonly interview questions. Global Assembly Cache (GAC) is an acronym for Global Assembly Cache (GAC). In the.NET framework, GAS is a shared assembly area where most assemblies are placed. GAC also contains Framework Class Library (FCL) assemblies. These are assemblies that are used by several people. Strong-named assemblies must be used for all shared assemblies. Using the.NET Tool sn.exe, the string name is connected with the assembly.

10.What exactly is C#?

ANS:The C# programming language is an object-oriented programming language that is managed. The C# language combines the ease of Java with the power of C++. The C# programming language is a type-safe object-oriented programming language. It supports all of object-oriented programming's major and minor pillars. It contains its own set of keywords to represent the programme and is case sensitive. The syntax of C# source code is comparable to that of C, C++, and Java. For application development, C# has access to the.NET Framework Class Library (FCL). In a.NET application, C# source code may access both unmanaged and managed code. Because of the Interoperability idea, a legacy programme built in DLL or utilising COM may be accessible in a.NET application.

11.How does a.NET application run?

ANS:Before being executed,.NET source code is compiled twice. The following are the steps in the compilation process: With the aid of a language-specific compiler, source code (C# or VB.NEt) is compiled into MSIL (Microsoft Intermediate Language). CSC compiler for C# and VBC compiler for VB.NET, for example. The C# compiler converts source code to MSIL. MSIL code is placed in a file with the.dll or.exe extension. It is a logical deployment unit known as assembly. The MSIL code is subsequently turned into native executable code using the Just-in-Time(JIT) compiler, which is part of CLR. The machine's CPU subsequently processes the executable code.

12.What exactly is the Value type?

ANS:The data is directly contained in the value types. The stack is always used to hold actual data.

13.What is the definition of a reference type?

ANS:The real data is kept on the heap, whereas reference types save a reference to the memory location on the stack.

14.What exactly is boxing?

ANS:Converting a value type to a reference type is known as boxing. Implicit conversion is another name for it.

15.What exactly is unboxing?

ANS:Changing from a reference to a value type. An explicit conversion is another name for it.

16.What exactly is Enum?

ANS:The Value type Enum is made up of a set of named integer constants. Each member starts at 0 and increases by 1 with each subsequent member. To follow a sequential ordering, enums are not required.

17.What exactly is a struct?

ANS:A value type is the structure. It's employed while creating geometrical or mathematical applications. It aids in the creation of new value-type objects that are comparable to the built-in type (int, float, bool, and so on).

18.Where does the value type get kept if we have a class that references it?

ANS:A Heap is used to store the value type.

19.In C#, how can you tell the difference between "constant" and "readonly" variables?

ANS:To make variables constant, use the Constant keyword. We can't change the constant's value. At compilation time, constant variables are evaluated. Variables of the value type are supported. To make a variable read-only, use the readonly keyword. At runtime, readonly variables are evaluated. Variables of the reference type are supported.

20.How many different methods are there to send arguments to the method?

ANS:There are two ways to send parameters to methods: reference and output. arguments for ref(reference): It's time to set up the ref parameters. When ref is used to supply parameters, the method refers to the same variable that was supplied into it. When control is transferred back to the calling method, any changes made to the method's arguments will be reflected in the variable. parameters for out(output): It is not necessary to initialise the out parameters. They must, however, set a value to the control before returning it to the calling function. Multiple values can be returned using our arguments.

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