Unmanaged Code Definition:

Unmanaged code is often known as unsafe code. Because it is aimed at the processor architecture, unmanaged code is reliant on the modern computer, in C#.

The CLR handles tasks such as stack management, memory allocation, and release, among other things, so the programmer is free to focus on other things.

Whenever a computer uses the word “unsafe,” the system recognizes he or it will be in control of the program. However, problems like buffer overflows can occur if a coder creates faulty code.

When the .NET framework was released, it was necessary to facilitate calling and integrating unmanaged code into C# programs. This one was applicable to any language that used the .NET framework, not even C#.

There are two main services that provide this assistance. The first one is InteropServices, and the second is Platform Invoke Technologies.

To ingest unmanaged code, you must match one of four factors to be identified;

• (specify the function name and the DLL which holds it).
• Make a class that holds and groups DLLs.
• Prototypes should be written in managed code.
• Make a call to a DLL function.

Advantages Of An Unmanaged Code:

• Unsafe code enhances the validity and reliability of the program.
• The coder is accessible at a low level.
• Unsafe code is used to communicate with the storage.

Disadvantages Of Unmanaged Code:

• There is no safety in the app.
• Errors must be dealt with by the programmer.
• Garbage disposal is not implemented automatically.
• When unsafe code is used, data validation is skipped, which might result in errors.

View State Definition:

View state is stored in a structure and is immediately accessible when the page loads. The values stored in the view state are not transferable among pages.

The view state is enabled by default, and independent of whether that is utilized during a component, it serializes the data in every component on the page.

The Enable View State attribute must be set to false to deactivate the view state for a single control.

The Enable View State Mac property is used to recognize any effort or approach to corrupt the view state.

View state’s general characteristics include storing the values of regulated characteristics and pages discovered in the responsible page without the need of a session, preserving the value of the direct authority after a post-back procedure, and creating a custom view state supplier for storing view state information from the database.

View state is simple to set up and requires no system resources. It also comes with better security measures, compacted or encrypted, and helps with Unicode implementations.

The disadvantages of view state, on the other hand, are numerous. The performance is not optimal for big amounts of data, as huge values may cause the view state to be slow. Only the variables for the very same page can be saved in the view state. It also poses a security concern and necessitates additional coding to ensure data protection.

Method Overriding Definition:

The state of overriding lets a subclass or child class specify a specific implementation function that is already sent by one of its super classes or parent classes in any object-oriented programming language. When a subclass’s method has a similar name, value, area, or sign, and return type(or sub-type) as a method in its superclass, the subclass’s method is said to override the super-method class’s.

One way that Java gets Runtime Polymorphism is by method overriding. However, the child class’s version is used when a method is applied using an object from a subclass. In other words, the version of an overridden method that gets performed is determined by the type of the object being referenced to, not the type of the reference variable.

Overriding method rules are as given below:

• Overriding: An overriding method’s access modifier can grant more, but not less, access than the overridden method. A protected instance method in the superclass, for example, can be made public in the subclass but not private. This will cause a compile-time error.
• Final methods cannot be overridden: We declare a method as final if we do not want it to be overridden.
• Private methods: These methods cannot be overridden since they are bonded at build time. We can’t even override secret methods in a subclass as a result.
• The return type (or subtype) of the overriding method must match: Since Java 5.0, The return type of a child class’s overriding method can be many, but it must be a subtype of the parent’s return type. Covariant return type describes this phenomenon.
• Invoking an overridden method from a subclass: The super keyword can be used to apply the parent class method in an overriding practice.

To avoid a compile-time error, derived concrete classes must override abstract methods in an interface or abstract class.

Overriding and synchronized/strictfp methods: 

The availability of a synchronized/strictfp modifier with a technique has no influence on the overriding rules, which means a synchronized/strictfp technique can override a non-synchronized/strictfp method and vice versa.

Overridden methods enable Java to provide polymorphism at runtime, as previously indicated. Polymorphism is important in object-oriented programming because it allows a generic class to declare methods that will be shared by all of its descendants while allowing subclasses to define the specific implementation of any or all of those methods. Java states the “one interface, various methods” element of polymorphism in various ways.

Methodology Dynamic Object-oriented design’s dispatch mechanism is one of the most powerful code reuse and robustness techniques. The method to use existing code libraries to call methods on new class instances without recompiling while keeping a clean abstract interface is a tremendously valuable feature.

JIT Compiler Definition:

The JIT compiler is a runtime environment component that boosts JavaTM program performance by converting bytecode to native machine code at runtime.

Platform-neutral bytecodes are involved in Java classes, which a JVM can stop on a range of computer architectures. The JVM loads the class file assessment at runtime assesses each bytecode’s semantics and performs the required computations.

A Java application runs slower than a native application due to the increased CPU and memory usage during interpretation. By translating bytecodes into native machine code at runtime, the JIT compiler aids in the performance of Java programs.

By default, the JIT compiler is on. When a method is compiled, the JVM directly calls the compiled code of that function instead of interpreting it. Compiling every method may theoretically allow the Java program’s speed to approach that of a native application if compilation did not want processing time or memory usage.

JIT compilation necessitates the use of both the processor and memory. Thousands of methods are invoked when the JVM first starts up. Even if the software eventually achieves extremely good peak performance, compiling all of these functions might greatly impact start-up time.

The first time a method is invoked, it is not compiled. The JVM keeps track of each method’s invocation count, starting at a specified compilation threshold and decreasing with each call. A just-in-time compilation for the method is triggered when the number of invocations hits zero.

As a result, frequently used methods are compiled immediately after the JVM starts, but less frequently used methods are produced considerably later, if at all. The JIT compilation threshold enables the JVM to start rapidly while maintaining high performance. The threshold was chosen to achieve the best possible start-up times and long-term performance balance.

Different techniques can be used to recompile a method to a higher level of optimization. Sampling is one of these mechanisms: the JIT compiler runs a specialized sampling thread that wakes up on a regular basis to detect which Java methods appear at the top of the stack more frequently. Such methods are thought to be more crucial for performance and thus are candidates for re-optimization at the hot, very hot, or scorching levels.

A procedure can be compiled at multiple optimization levels with the JIT compiler: cold, warm, hot, veryHot, or scorching. Larger optimization levels are supposed to deliver improved speed, but they also come with a higher CPU and memory compilation cost. A method’s initial or default optimization level is warm, but JIT heuristics may lower it to cold to improve start up time.

Definition of Razor Pages:

Razor Pages is a fresh, more straightforward approach to developing online applications. Using a file-based routing technique eliminates most of the ceremony of ASP.NET MVC. Every endpoint is represented by a Razor Pages file in the Pages directory. We can begin by installing the ASP.NET Razor Pages template.

Razor Pages is a lightweight and flexible framework, and it gives the developer complete control over the HTML that is generated. For cross-platform server-side HTML production, Razor Pages is the framework of choice.

For server-side programming, Razor Pages uses the popular C# programming language and the simple Razor templating syntax for embedding C# in HTML mark-up to generate content for browsers dynamically.

Razor Pages are ideal for basic data entry or read-only pages. MVC has recently become popular in most programming languages for online applications, and there are advantages and disadvantages to it. As an MVVM solution, ASP.NET WebForms was created.

Instead of using controllers and views as a standard ASP.NET MVC application, Razor Pages focuses on page-based scenarios for web application development. When an HTTP request is received, it is routed through the middleware pipeline until it reaches a middleware component that can handle and process it.

Razor pages are more well-organised; they group files according to their function and design for the problem they solve. Each class it defines for functionality is backed by closely integrated code. They’re ideal for simple data entry pages because they’re read-only.

Razor Pages’ Benefits include the following:

• Any MVC programme includes Razor Pages by default.
• There are no controllers in a simple structural context.
• Flexibility to accommodate any application you choose to create
• It’s more organised and has special codes hidden under each page.
• As with ASP.NET Webforms, you can create web apps in less time.
• It provides total control over both HTML and URLs.
• There are fewer issues to deal with and more control with only one controller. 
• Look for any mistakes in the validation. 
• Dependency injection is used to keep track of dependencies.
• IDE’s built-in test features can be used to conduct testing.