Ans:.NET Framework is a complete environment that allows developers to develop, run, and deploy the following applications:
.NET Framework also enables a developer to create sharable components to be used in distributed computing architecture. NET Framework supports the object-oriented programming model for multiple languages, such as Visual Basic, Visual C#, and Visual C++. .NET Framework supports multiple programming languages in a manner that allows language interoperability. This implies that each language can use the code written in some other language.
Ans: .NET Framework provides enormous advantages to software developers in comparison to the advantages provided by other platforms. Microsoft has united various modern as well as existing technologies of software development in .NET Framework. These technologies are used by developers to develop highly efficient applications for modern as well as future business needs. The following are the key components of .NET Framework:
Ans: The following are the new features of .NET Framework 4.0:
Interested in mastering .NET? Learn more about ".NET Training" in this blog post.
Ans: Intermediate Language is also known as MSIL (Microsoft Intermediate Language) or CIL (Common Intermediate Language). All .NET source code is compiled to IL. IL is then converted to machine code at the point where the software is installed, or at run-time by a Just-In-Time (JIT) compiler.
Ans: Assembly metadata is stored in Manifest. Manifest contains all the metadata needed to do the following things
The assembly manifest can be stored in a PE file either (an .exe or) .dll with Microsoft intermediate language (MSIL code with Microsoft intermediate language (MSIL) code or in a stand-alone PE file, that contains only assembly manifest information.
Ans: Code contracts help you to express the code assumptions and statements stating the behavior of your code in a language-neutral way. The contracts are included in the form of pre-conditions, post-conditions, and object-invariants. The contracts help you to improve-testing by enabling run-time checking, static contract verification, and documentation generation.
The System.Diagnostics.Contracts namespace contains static classes that are used to express contracts in your code.
Ans: The following two new classes are introduced in the System. Numerics namespace:
Ans: Managed extensibility framework (MEF) is a new library that is introduced as a part of .NET 4.0 and Silverlight 4. It helps in extending your application by providing greater reuse of applications and components. MEF provides a way for the host applications to consume external extensions without any configuration requirement.
Ans: Memory-mapped files (MMFs) allow you to map the content of a file to the logical address of an application. These files enable the multiple processes running on the same machine to share data with each Other. TheMemoryMappedFile.CreateFromFile() method is used to obtain a MemoryMappedFile object that represents a persisted memory-mapped file from a file on disk.
These files are included in the System.IO.MemoryMappedFiles namespace. This namespace contains four classes and three enumerations to help you access and secure your file mappings.
Ans: CTS is the component of CLR through which .NET Framework provides support for multiple languages because it contains a type system that is common across all the languages. Two CTS-compliant languages do not require type conversion when calling the code written in one language from within the code written in another language. CTS provides a base set of data types for all the languages supported by.NET Framework. This means that the size of integer and long variables is the same across all .NET-compliant programming languages. However, each language uses aliases for the base data types provided by CTS. For example, CTS uses the data type system. int32 to represent a 4-byte integer value; however, Visual Basic uses the alias integer for the same; whereas, C# uses the alias int. This is done for the sake of clarity and simplicity.
Ans: Side-by-side execution enables you to run multiple versions of an application or component and CLR on the same computer at the same time. As versioning is applicable only to shared assemblies and not to private assemblies, two applications, one using a private assembly and the other using a shared assembly, cannot be stated as side-by-side executables.
Ans: The System.GC.Collect() method.
Ans: CLR uses the Dispose and Finalize methods to perform garbage collection of run-time objects of .NET applications.
The Finalize method is called automatically by the runtime. CLR has a garbage collector (GC), which periodically checks for objects in heap that are no longer referenced by any object or program. It calls the Finalize method to free the memory used by such objects. The Dispose method is called by the programmer. Dispose is another method to release the memory used by an object. The Dispose method needs to be explicitly called in code to dereference an object from the heap. The Dispose method can be invoked only by the classes that implement the IDisposableinterface.
Ans: Code access security (CAS) is part of the .NET security model that prevents unauthorized access of resources and operations, and restricts the code to perform particular tasks.
Ans: Managed code is the code that is executed directly by the CLR instead of the operating system. The code compiler first compiles the managed code to intermediate language (IL) code, also called as MSIL code. This code doesn't depend on machine configurations and can be executed on different machines.
Unmanaged code is the code that is executed directly by the operating system outside the CLR environment. It is directly compiled to native machine code which depends on the machine configuration. In the managed code, since the execution of the code is governed by CLR, the runtime provides different services, such as garbage collection, type checking, exception handling, and security support. These services help provide uniformity in platform and language-independent behavior of managed code applications. In the unmanaged code, the allocation of memory, type safety, and security is required to be taken care of by the developer. If the unmanaged code is not properly handled, it may result in a memory leak. Examples of unmanaged code are ActiveX components and Win32 APIs that execute beyond the scope of native CLR.
Ans: Tuple is a fixed-size collection that can have elements of either the same or different data types. Similar to arrays, a user must have to specify the size of a tuple at the time of declaration. Tuples are allowed to hold up from 1 to 8 elements and if there are more than 8 elements, then the 8th element can be defined as another tuple. Tuples can be specified as a parameter or return type of a method.
Ans: YOU can use the Code Access Security Tool (Caspol.exe) to turn security on and off.
In the .NET Framework 4.0, for using Caspol.exe, you first need to set the <LegacyCasPolicy> element to true.
Ans: Garbage collection prevents memory leaks during the execution of programs. A garbage collector is a low-priority process that manages the allocation and deallocation of memory for your application. It checks for the unreferenced variables and objects. If GC finds any object that is no longer used by the application, it frees up the memory from that object.
GC has changed a bit with the introduction of .NET 4.0. In .NET 4.0, the GC.Collect() method contains the following overloaded methods:
GC.Collect(int)
GC.Collect(int, GCCollectionMode) Another new feature introduced in .NET is to notify you when the GC.Collect() method is invoked and completed successfully by using different methods. The .NET 4.0 supports a new background garbage collection that replaces the concurrent garbage collection used in earlier versions. This concurrent GC allocates memory while running and uses current segment (which is 16 MB on a workstation) for that. After that, all threads are suspended. In the case of background GC, a separate ephemeral GC - gen0 and gen1 can be started, while the full GC - gen0, 1, and 2 - is already running.
Ans: There are two key concepts of CAS security policy- code groups and permissions. A code group contains assemblies in it in a manner that each .NET assembly is related to a particular code group and some permissions are granted to each code group. For example, using the default security policy, a control downloaded from a Web site belongs to the Zone, Internet code group, which adheres to the permissions defined by the named permission set. (Normally, the named permission set represents a very restrictive range of permissions.)
Assembly execution involves the following steps:
Ans: Following are the differences between namespace and assembly:
Ans: A piece of managed code is executed as follows:
Ans: Use the GC.SuppressFinalize() method to suppress the finalize process inside the garbage collector forcibly in .NET.
Ans: The following are two ways to instantiate a tuple:
Tuple<String, int> t = new Tuple<String, int> ("Hellow", 2);
Tuple<int, int, int> t = Tuple.Create<int, int, int> (2, 4, 5);
Ans: System.Object is the root namespace for fundamental types in .NET Framework.
Ans: The CAS mechanism in .NET is used to control and configure the ability of managed code. Earlier, as this policy was applicable for only native applications, the security guarantee was limited. Therefore, developers used to look for alternative solutions, such as operating system-level solutions. This problem was solved in .NET Framework 4 by turning off the machine-wide security. The shared and hosted Web applications can now run more securely. The security policy in .NET Framework 4 has been simplified using the transparency model. This model allows you to run the Web applications without concern about the CAS policies.
As a result of security policy changes in .NET Framework 4.0, you may encounter compilation warnings and runtime exceptions, if your try to use the obsolete CAS policy types and members either implicitly or explicitly. However, you can avoid the warnings and errors by using the <NetFx40_LegacySecurityPolicy> configuration element in the runtime settings schema to opt into the obsolete CAS policy behavior.
Ans: The .NET Framework is shipped with compilers of all .NET programming languages to develop programs. There are separate compilers for the Visual Basic, C#, and Visual C++ programming languages in .NET Framework. Each .NET compiler produces an intermediate code after compiling the source code. The intermediate code is common for all languages and is understandable only to .NET environment. This intermediate code is known as MSIL.
Ans: Lazy initialization is a process by which an object is not initialized until it is first called in your code. The .NET 4.0 introduces a new wrapper class, System.Lazy<T>, for executing the lazy initialization in your application. Lazy initialization helps you to reduce the wastage of resources and memory requirements to improve performance. It also supports thread-safety.
Ans: Memory management in the CLR is divided into three generations that are build up by grouping memory segments. Generations enhance garbage collection performance. The following are the three types of generations found in a garbage collector:
Ans: In .NET 4.0, the CLR supports covariance and contravariance of types in generic interfaces and delegates. Covariance enables you to cast a generic type to its base types, that is, you can assign an instance of type IEnumerable<Tl> to a variable of type IEnumerable<T2> where T1 derives from T2. For example,
IEnumerable<string> str1= new List<string> ();
IEnumerable<object> str2= str1; Contravariance allows you to assign a variable of Action<base> to a variable of type Action<derived>. For example,
IComparer<object> obj1 = GetComparer()
IComparer<string> obj2 = obj1; .NET framework 4.0 uses some language keywords (out and in) to annotate covariance and contra-variance. Out is used for covariance, while in is used for contra-variance.
Variance can be applied only to reference types, generic interfaces, and generic delegates. These cannot be applied to value types and generic types.
Ans: The following are the different ways to assign a value to a complex number:
Bypassing two Double values to its constructor. The first value represents the real, and the second value represents the imaginary part of a complex number. For example,
Complex c1 = new Complex(5, 8); /* It represents (5, 8) */ By assigning a Byte, SByte, Intl6, UIntl6, Int32, UInt32, Int64, UInt64, Single, or Double value to a complex object. The assigned value represents the real part of the complex number, and its imaginary part becomes0. For example,
Complex c2 = 15.3; /* It represents (15.3, 0) */ By casting a Decimal or BigInteger value to a Complex object. For example,
Complex c3 = (Complex) 14.7; /* It represents (14.7, 0) */ Assigning the value returned by an operator to a Complex variable. For example,
Complex c4 = c1 + c2; /* It represents (20.3, 8) */
Our design of course tutorials and interview questions is practical and informative. At TekSlate, we offer resources to help you learn various IT courses. We avail of both written material and demo video tutorials. For in-depth knowledge and practical experience explore Online ASP.NET Training.
e:T706b,
Ans:.NET Framework is a complete environment that allows developers to develop, run, and deploy the following applications:
.NET Framework also enables a developer to create sharable components to be used in distributed computing architecture. NET Framework supports the object-oriented programming model for multiple languages, such as Visual Basic, Visual C#, and Visual C++. .NET Framework supports multiple programming languages in a manner that allows language interoperability. This implies that each language can use the code written in some other language.
Ans: .NET Framework provides enormous advantages to software developers in comparison to the advantages provided by other platforms. Microsoft has united various modern as well as existing technologies of software development in .NET Framework. These technologies are used by developers to develop highly efficient applications for modern as well as future business needs. The following are the key components of .NET Framework:
Ans: The following are the new features of .NET Framework 4.0:
Interested in mastering .NET? Learn more about ".NET Training" in this blog post.
Ans: Intermediate Language is also known as MSIL (Microsoft Intermediate Language) or CIL (Common Intermediate Language). All .NET source code is compiled to IL. IL is then converted to machine code at the point where the software is installed, or at run-time by a Just-In-Time (JIT) compiler.
Ans: Assembly metadata is stored in Manifest. Manifest contains all the metadata needed to do the following things
The assembly manifest can be stored in a PE file either (an .exe or) .dll with Microsoft intermediate language (MSIL code with Microsoft intermediate language (MSIL) code or in a stand-alone PE file, that contains only assembly manifest information.
Ans: Code contracts help you to express the code assumptions and statements stating the behavior of your code in a language-neutral way. The contracts are included in the form of pre-conditions, post-conditions, and object-invariants. The contracts help you to improve-testing by enabling run-time checking, static contract verification, and documentation generation.
The System.Diagnostics.Contracts namespace contains static classes that are used to express contracts in your code.
Ans: The following two new classes are introduced in the System. Numerics namespace:
Ans: Managed extensibility framework (MEF) is a new library that is introduced as a part of .NET 4.0 and Silverlight 4. It helps in extending your application by providing greater reuse of applications and components. MEF provides a way for the host applications to consume external extensions without any configuration requirement.
Ans: Memory-mapped files (MMFs) allow you to map the content of a file to the logical address of an application. These files enable the multiple processes running on the same machine to share data with each Other. TheMemoryMappedFile.CreateFromFile() method is used to obtain a MemoryMappedFile object that represents a persisted memory-mapped file from a file on disk.
These files are included in the System.IO.MemoryMappedFiles namespace. This namespace contains four classes and three enumerations to help you access and secure your file mappings.
Ans: CTS is the component of CLR through which .NET Framework provides support for multiple languages because it contains a type system that is common across all the languages. Two CTS-compliant languages do not require type conversion when calling the code written in one language from within the code written in another language. CTS provides a base set of data types for all the languages supported by.NET Framework. This means that the size of integer and long variables is the same across all .NET-compliant programming languages. However, each language uses aliases for the base data types provided by CTS. For example, CTS uses the data type system. int32 to represent a 4-byte integer value; however, Visual Basic uses the alias integer for the same; whereas, C# uses the alias int. This is done for the sake of clarity and simplicity.
Ans: Side-by-side execution enables you to run multiple versions of an application or component and CLR on the same computer at the same time. As versioning is applicable only to shared assemblies and not to private assemblies, two applications, one using a private assembly and the other using a shared assembly, cannot be stated as side-by-side executables.
Ans: The System.GC.Collect() method.
Ans: CLR uses the Dispose and Finalize methods to perform garbage collection of run-time objects of .NET applications.
The Finalize method is called automatically by the runtime. CLR has a garbage collector (GC), which periodically checks for objects in heap that are no longer referenced by any object or program. It calls the Finalize method to free the memory used by such objects. The Dispose method is called by the programmer. Dispose is another method to release the memory used by an object. The Dispose method needs to be explicitly called in code to dereference an object from the heap. The Dispose method can be invoked only by the classes that implement the IDisposableinterface.
Ans: Code access security (CAS) is part of the .NET security model that prevents unauthorized access of resources and operations, and restricts the code to perform particular tasks.
Ans: Managed code is the code that is executed directly by the CLR instead of the operating system. The code compiler first compiles the managed code to intermediate language (IL) code, also called as MSIL code. This code doesn't depend on machine configurations and can be executed on different machines.
Unmanaged code is the code that is executed directly by the operating system outside the CLR environment. It is directly compiled to native machine code which depends on the machine configuration. In the managed code, since the execution of the code is governed by CLR, the runtime provides different services, such as garbage collection, type checking, exception handling, and security support. These services help provide uniformity in platform and language-independent behavior of managed code applications. In the unmanaged code, the allocation of memory, type safety, and security is required to be taken care of by the developer. If the unmanaged code is not properly handled, it may result in a memory leak. Examples of unmanaged code are ActiveX components and Win32 APIs that execute beyond the scope of native CLR.
Ans: Tuple is a fixed-size collection that can have elements of either the same or different data types. Similar to arrays, a user must have to specify the size of a tuple at the time of declaration. Tuples are allowed to hold up from 1 to 8 elements and if there are more than 8 elements, then the 8th element can be defined as another tuple. Tuples can be specified as a parameter or return type of a method.
Ans: YOU can use the Code Access Security Tool (Caspol.exe) to turn security on and off.
In the .NET Framework 4.0, for using Caspol.exe, you first need to set the <LegacyCasPolicy> element to true.
Ans: Garbage collection prevents memory leaks during the execution of programs. A garbage collector is a low-priority process that manages the allocation and deallocation of memory for your application. It checks for the unreferenced variables and objects. If GC finds any object that is no longer used by the application, it frees up the memory from that object.
GC has changed a bit with the introduction of .NET 4.0. In .NET 4.0, the GC.Collect() method contains the following overloaded methods:
GC.Collect(int)
GC.Collect(int, GCCollectionMode) Another new feature introduced in .NET is to notify you when the GC.Collect() method is invoked and completed successfully by using different methods. The .NET 4.0 supports a new background garbage collection that replaces the concurrent garbage collection used in earlier versions. This concurrent GC allocates memory while running and uses current segment (which is 16 MB on a workstation) for that. After that, all threads are suspended. In the case of background GC, a separate ephemeral GC - gen0 and gen1 can be started, while the full GC - gen0, 1, and 2 - is already running.
Ans: There are two key concepts of CAS security policy- code groups and permissions. A code group contains assemblies in it in a manner that each .NET assembly is related to a particular code group and some permissions are granted to each code group. For example, using the default security policy, a control downloaded from a Web site belongs to the Zone, Internet code group, which adheres to the permissions defined by the named permission set. (Normally, the named permission set represents a very restrictive range of permissions.)
Assembly execution involves the following steps:
Ans: Following are the differences between namespace and assembly:
Ans: A piece of managed code is executed as follows:
Ans: Use the GC.SuppressFinalize() method to suppress the finalize process inside the garbage collector forcibly in .NET.
Ans: The following are two ways to instantiate a tuple:
Tuple<String, int> t = new Tuple<String, int> ("Hellow", 2);
Tuple<int, int, int> t = Tuple.Create<int, int, int> (2, 4, 5);
Ans: System.Object is the root namespace for fundamental types in .NET Framework.
Ans: The CAS mechanism in .NET is used to control and configure the ability of managed code. Earlier, as this policy was applicable for only native applications, the security guarantee was limited. Therefore, developers used to look for alternative solutions, such as operating system-level solutions. This problem was solved in .NET Framework 4 by turning off the machine-wide security. The shared and hosted Web applications can now run more securely. The security policy in .NET Framework 4 has been simplified using the transparency model. This model allows you to run the Web applications without concern about the CAS policies.
As a result of security policy changes in .NET Framework 4.0, you may encounter compilation warnings and runtime exceptions, if your try to use the obsolete CAS policy types and members either implicitly or explicitly. However, you can avoid the warnings and errors by using the <NetFx40_LegacySecurityPolicy> configuration element in the runtime settings schema to opt into the obsolete CAS policy behavior.
Ans: The .NET Framework is shipped with compilers of all .NET programming languages to develop programs. There are separate compilers for the Visual Basic, C#, and Visual C++ programming languages in .NET Framework. Each .NET compiler produces an intermediate code after compiling the source code. The intermediate code is common for all languages and is understandable only to .NET environment. This intermediate code is known as MSIL.
Ans: Lazy initialization is a process by which an object is not initialized until it is first called in your code. The .NET 4.0 introduces a new wrapper class, System.Lazy<T>, for executing the lazy initialization in your application. Lazy initialization helps you to reduce the wastage of resources and memory requirements to improve performance. It also supports thread-safety.
Ans: Memory management in the CLR is divided into three generations that are build up by grouping memory segments. Generations enhance garbage collection performance. The following are the three types of generations found in a garbage collector:
Ans: In .NET 4.0, the CLR supports covariance and contravariance of types in generic interfaces and delegates. Covariance enables you to cast a generic type to its base types, that is, you can assign an instance of type IEnumerable<Tl> to a variable of type IEnumerable<T2> where T1 derives from T2. For example,
IEnumerable<string> str1= new List<string> ();
IEnumerable<object> str2= str1; Contravariance allows you to assign a variable of Action<base> to a variable of type Action<derived>. For example,
IComparer<object> obj1 = GetComparer()
IComparer<string> obj2 = obj1; .NET framework 4.0 uses some language keywords (out and in) to annotate covariance and contra-variance. Out is used for covariance, while in is used for contra-variance.
Variance can be applied only to reference types, generic interfaces, and generic delegates. These cannot be applied to value types and generic types.
Ans: The following are the different ways to assign a value to a complex number:
Bypassing two Double values to its constructor. The first value represents the real, and the second value represents the imaginary part of a complex number. For example,
Complex c1 = new Complex(5, 8); /* It represents (5, 8) */ By assigning a Byte, SByte, Intl6, UIntl6, Int32, UInt32, Int64, UInt64, Single, or Double value to a complex object. The assigned value represents the real part of the complex number, and its imaginary part becomes0. For example,
Complex c2 = 15.3; /* It represents (15.3, 0) */ By casting a Decimal or BigInteger value to a Complex object. For example,
Complex c3 = (Complex) 14.7; /* It represents (14.7, 0) */ Assigning the value returned by an operator to a Complex variable. For example,
Complex c4 = c1 + c2; /* It represents (20.3, 8) */
Our design of course tutorials and interview questions is practical and informative. At TekSlate, we offer resources to help you learn various IT courses. We avail of both written material and demo video tutorials. For in-depth knowledge and practical experience explore Online ASP.NET Training.
f:{"id":1,"author_designation":"Content Writer","author_name":"TekSlate","author_bio":"TekSlate is the best online training provider in delivering world-class IT skills to individuals and corporates from all parts of the globe. We are proven experts in accumulating every need of an IT skills upgrade aspirant and have delivered excellent services. We aim to bring you all the essentials to learn and master new technologies in the market with our articles, blogs, and videos. Build your career success with us, enhancing most in-demand skills in the market.
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