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Questions and Answers
What is the primary function of the Common Language Runtime (CLR)?
What is the primary function of the Common Language Runtime (CLR)?
- To provide a graphical user interface for applications.
- To compile code written in unmanaged languages.
- To execute and manage the lifecycle of executable code in .NET. (correct)
- To serve as a repository for storing application data.
Which of the following best describes the term 'managed code'?
Which of the following best describes the term 'managed code'?
- Code that runs outside of the CLR's management.
- Code that is compiled to native machine instructions.
- Code written specifically for the Windows operating system.
- Code that targets the Common Language Runtime. (correct)
What are the primary namespaces under which most methods in the .NET class library are categorized?
What are the primary namespaces under which most methods in the .NET class library are categorized?
- Application.* and Service.*
- System.* and Microsoft.* (correct)
- Java.* and Python.*
- Core.* and Framework.*
Which .NET technology is specifically used for developing web-based applications?
Which .NET technology is specifically used for developing web-based applications?
What type of applications can be developed using WinForms in the .NET framework?
What type of applications can be developed using WinForms in the .NET framework?
Which of the following technologies is used to interact with databases in .NET applications?
Which of the following technologies is used to interact with databases in .NET applications?
What principle does the .NET framework support in terms of compatibility?
What principle does the .NET framework support in terms of compatibility?
Which of the following statements is false regarding the Common Language Runtime (CLR)?
Which of the following statements is false regarding the Common Language Runtime (CLR)?
What are literal keywords primarily associated with in C#?
What are literal keywords primarily associated with in C#?
Which of the following describes contextual keywords in C#?
Which of the following describes contextual keywords in C#?
How does Visual Studio differentiate between regular and contextual keywords?
How does Visual Studio differentiate between regular and contextual keywords?
What is the correct way to use a reserved keyword as an identifier in C#?
What is the correct way to use a reserved keyword as an identifier in C#?
Which type of keywords are specifically used within LINQ queries in C#?
Which type of keywords are specifically used within LINQ queries in C#?
What type of applications can be developed with C#?
What type of applications can be developed with C#?
Which of the following is NOT a type of comment in C#?
Which of the following is NOT a type of comment in C#?
What category of data types includes integers and floats in C#?
What category of data types includes integers and floats in C#?
Which of the following options best describes memory management in the .NET framework?
Which of the following options best describes memory management in the .NET framework?
What must be done when declaring a variable in C#?
What must be done when declaring a variable in C#?
Which framework allows for mobile application development using C#?
Which framework allows for mobile application development using C#?
What is a primary feature of C# as a programming language?
What is a primary feature of C# as a programming language?
Which of the following data types is classified as a reference type in C#?
Which of the following data types is classified as a reference type in C#?
To indicate a decimal value in C#, which suffix should be used?
To indicate a decimal value in C#, which suffix should be used?
Which of the following applications can be developed using C#?
Which of the following applications can be developed using C#?
In which year was C# first introduced?
In which year was C# first introduced?
What is the purpose of the .NET framework?
What is the purpose of the .NET framework?
Which statement about the .NET framework is true?
Which statement about the .NET framework is true?
What advantage does C# have in relation to other programming languages?
What advantage does C# have in relation to other programming languages?
Which programming languages are supported by the .NET framework?
Which programming languages are supported by the .NET framework?
What are the best features that C# adopted from Java and C++?
What are the best features that C# adopted from Java and C++?
What is the primary characteristic of integer type numbers in C#?
What is the primary characteristic of integer type numbers in C#?
Which C# keyword category is used to define the accessibility of classes and their members?
Which C# keyword category is used to define the accessibility of classes and their members?
What happens during an implicit conversion in C#?
What happens during an implicit conversion in C#?
Which of the following is a correct description of floating-point type numbers in C#?
Which of the following is a correct description of floating-point type numbers in C#?
What are keywords in C#?
What are keywords in C#?
Which type of keywords are used to control the flow of a program in C#?
Which type of keywords are used to control the flow of a program in C#?
How do modifier keywords function in C#?
How do modifier keywords function in C#?
What role do access keywords play in C#?
What role do access keywords play in C#?
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Study Notes
Introduction to C#
- C# (C Sharp) is an object-oriented programming language developed by Microsoft in 2000.
- It is part of the .NET framework, enabling easy integration with applications written in other .NET languages.
- C# can be used to create various applications, including web, desktop, and console applications.
- The language was designed to incorporate popular features from Java and C++.
- The first version was released with .NET Framework 1.0 in 2002.
.NET Framework
- The .NET Framework is a software development platform for creating applications that run on Windows.
- It supports various programming languages, including Visual Basic and C#.
- It offers two main application types: Form-based applications and Web-based applications.
- Supports development of web services.
Key Components of .NET Framework
- Common Language Runtime (CLR): The execution engine responsible for managing the lifecycle of executables and executing .NET code (managed code).
- Class Library: A collection of standard methods and functions grouped by namespaces like System.* and Microsoft.*.
- Application Types:
- WinForms: For developing desktop applications.
- ASP.NET: For web applications running in a browser.
- ADO.NET: For database interaction applications (e.g., Oracle, SQL Server).
.NET Design Principles
- Interoperability: Backward support for older frameworks.
- Portability: Applications can operate on any Windows platform.
- Security: Robust security mechanisms included.
- Memory Management: Managed by the CLR, simplifying development.
C# Applications
- Full Stack Web Development using ASP.NET.
- Real-time communication development with SignalR.
- Mobile application development using Xamarin.
- Desktop applications with WPF and UWP.
- Game development through Unity and CryEngine.
- AI and machine learning using Azure services.
- IoT applications developed with UWP.
C# Programming Basics
- A variety of applications can be built in C#, including window-based and console applications.
- Comments in C#:
- Single line:
//
- Block comments:
/* comment */
- XML comments for documentation:
///
- Single line:
C# Data Types
- C# is a strongly typed language requiring explicit declaration of variable types.
- Data types are categorized into:
- Value Types: Includes simple types (int, float, bool, char), enum types, struct types, and nullable types.
- Reference Types: Class types, interface types, delegate types, and arrays.
- Certain numeric types have specific suffixes (e.g.,
u
for unsigned integers,f
for float).
C# Operators
- Supports various operators, including:
- Arithmetic Operators: For mathematical operations.
- Relational Operators: For comparison operations.
- Logical Operators: For logical operations.
C# Keywords
- Keywords are reserved words in C# with specific meanings in the compiler.
- Types of keywords include:
- Modifier Keywords: Control modification permissions for types and members.
- Access Modifiers: Define accessibility of classes and their members.
- Statement Keywords: Influence program flow.
- Type Keywords: Define data types.
- Contextual Keywords: Context-specific keywords, not reserved but can be used as identifiers if prefixed (e.g.,
@class
). - Query Keywords: Specifically used in LINQ queries.
Additional Notes
- Contextual keywords do not appear in the standard syntax color in IDEs unless reserved.
- Implicit type conversion applies to specific situations where values are automatically converted to different data types.
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