C# 6.0 Professional Elective Quiz

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Questions and Answers

What is the primary purpose of C# as developed by Microsoft?

To provide a modern, object-oriented programming language that is simple, efficient, and secure (correct)
To serve primarily as a scripting language for small applications
To create a complex programming language for experts
To focus solely on enhancing web programming

Which feature was introduced in C# 6.0 to simplify property declarations?

Tuples
Pattern Matching
Auto-Property Initializers (correct)
String Interpolation

What benefit does the Null-Conditional Operator (?.) provide in C#?

It automates garbage collection.
It reduces the risk of a NullReferenceException. (correct)
It allows for unlimited string length.
It simplifies the syntax for defining classes.

Which C# version introduced Tuples as lightweight data structures?

C# 7.0 (A) Signup and view all the answers

What change did Pattern Matching bring in C# programming?

Allowed for more expressive code by matching patterns. (A) Signup and view all the answers

Which of the following improvements was NOT made in C# 6.0?

Tuples (D) Signup and view all the answers

What was a significant feature of C# 1.0 when it was first released?

Focus on core object-oriented principles and garbage collection. (B) Signup and view all the answers

What does String Interpolation allow in C#?

Embedding expressions directly within string literals. (C) Signup and view all the answers

What major improvement in C# 5.0 allowed developers to write asynchronous code more easily?

Async/Await (D) Signup and view all the answers

Which feature introduced in C# 10.0 simplifies namespace management?

Global Usings (B) Signup and view all the answers

What was a key change introduced by.NET Core compared to the traditional.NET Framework?

It allowed C# to be cross-platform. (D) Signup and view all the answers

What is the purpose of Required Members in C# 11.0?

To ensure certain members are initialized during object creation (A) Signup and view all the answers

Which version of .NET unified .NET Core and .NET Framework?

.NET 5 (D) Signup and view all the answers

Which of the following features allows for the creation of immutable data objects in C#?

Record Types (B) Signup and view all the answers

What is one of the first steps in developing a C# application?

Installing the.NET SDK. (B) Signup and view all the answers

What is the primary benefit of Raw String Literals introduced in C# 11.0?

Simplifies working with multi-line and special-character strings (C) Signup and view all the answers

Which IDE-related task is essential for starting a C# project?

Creating a new project. (B) Signup and view all the answers

What types of applications can C# be used to develop?

Enterprise applications, web applications, and mobile apps. (C) Signup and view all the answers

What improvement does the feature named Record Structs provide in C#?

Extends records to support value types (B) Signup and view all the answers

Which of the following is NOT a benefit of using C# as mentioned?

Limited to Windows OS. (D) Signup and view all the answers

Which C# feature introduced in version 10.0 helps reduce boilerplate code?

Global Usings (D) Signup and view all the answers

Which IDE is primarily recognized for its powerful features in C# development?

Visual Studio (B) Signup and view all the answers

What is a function of the IDE when running a C# program?

It provides options to run programs in various environments. (D) Signup and view all the answers

Which platform does NOT support C# development as mentioned?

DOS (A) Signup and view all the answers

What is the primary purpose of a namespace in a C# program?

To organize code and avoid name conflicts (C) Signup and view all the answers

Which component of a C# program is identified as the building block?

Class (C) Signup and view all the answers

What does the keyword 'static' in the Main method signify?

The method belongs to the class itself, not an instance (C) Signup and view all the answers

What is the purpose of the line 'Console.WriteLine("Hello, World!");' in a C# program?

To print output to the console window (B) Signup and view all the answers

What data type is specified for the parameter 'args' in the Main method?

string[] (A) Signup and view all the answers

Why is C# considered a case-sensitive language?

It recognizes the differences between uppercase and lowercase letters in identifiers (C) Signup and view all the answers

Which of the following accurately defines the purpose of the Main method?

To act as the entry point for a C# console application (B) Signup and view all the answers

What type of value does the Main method return?

Void (B) Signup and view all the answers

What feature introduced in C# 3.0 allows querying data using C# syntax?

LINQ (C) Signup and view all the answers

Which feature is designed to improve null-safety in C#?

Nullable Reference Types (B) Signup and view all the answers

What capability does the Dynamic Type introduced in C# 4.0 provide?

Dynamic typing for easier interaction with dynamic languages (D) Signup and view all the answers

Which of the following features simplifies the process of iterating through collections?

Iterators (B) Signup and view all the answers

What function of Local Functions in C# enhances encapsulation?

Enables defining functions within other functions (C) Signup and view all the answers

Which feature introduced in C# 8.0 enhances asynchronous programming?

Asynchronous Streams (B) Signup and view all the answers

Which version of C# introduced Lambda Expressions to enable functional programming patterns?

C# 3.0 (B) Signup and view all the answers

What innovation in C# 2.0 allowed for creating type-safe collections?

Generics (C) Signup and view all the answers

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Study Notes

Introduction to C#

C# is an object-oriented programming language developed by Microsoft.
Created under Anders Hejlsberg in 2000 as part of the .NET initiative.
Aims to provide a modern, efficient, and secure language, improving upon C++ and Java.

Key Versions and Features of C#

C# 1.0 (2002): Introduced core object-oriented principles, garbage collection, and familiarity with C/C++ syntax.
C# 2.0 (2005): Added generics, anonymous methods, and iterators for better code flexibility.
C# 3.0 (2007): Introduced LINQ for data querying and lambda expressions for concise programming.
C# 4.0 (2010): Focused on interoperability with dynamic languages using dynamic types and optional parameters.
C# 5.0 (2012): Revolutionized asynchronous programming with async/await facilities.
C# 6.0 (2015): Improved syntax with features like auto-property initializers, null-conditional operators, and string interpolation.
C# 7.0 and 7.1 (2017): Enhanced expressiveness with tuples, pattern matching, and local functions.
C# 8.0 (2019): Introduced nullable reference types for better null safety and asynchronous streams.
C# 9.0 (2020): Focused on immutability with records and init-only properties.
C# 10.0 (2021): Reduced boilerplate with global usings and record structs.
C# 11.0 (2022): Enhanced usability with raw string literals and generic math.

Development Environment Setup

Visual Studio: Comprehensive IDE with robust features including code editing, debugging, and version control.
Visual Studio Code: Lightweight, customizable IDE with support for C# development through extensions.
.NET Core and .NET 5+: Cross-platform framework enabling C# usage on Windows, macOS, and Linux.

Basic Structure of a C# Program

Must include a namespace for organization, a class as its building block, and a Main method as the entry point.
Example components:
- using System: Imports essential classes.
- namespace HelloWorldApp: Groups classes to avoid conflicts.
- class Program: Defines a new class encapsulating methods.
- static void Main(string[] args): Designates the program's starting point.

Various Operators in C#

Arithmetic Operators: Standard mathematical functions.
Comparison Operators: Used to compare values.
Logical Operators: Control flow and logic conditions.
Conditional Statements: Executes specific code blocks based on conditions.
Switch Statements: Provides a streamlined way to handle multiple conditions.

Summary of C# Syntax Features

C# is case-sensitive, differentiating between identifiers like 'main' and 'Main'.
Ongoing updates include enhancements for performance and support for functional programming paradigms.

Modern Use and Future of C#

Continues to evolve in enterprise applications, web development (via ASP.NET), mobile app development (Xamarin), and game development (Unity).
Future developments focus on functional programming features and maintaining competitiveness in modern programming languages.

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