Untitled Deck

Question 1

What is the most popular language for the .NET platform?

Answer 1

“C# is the most popular language for the .NET platform

Question 2

On what devices can C# programs run?

Answer 2

“C# programs can run on many devices

Question 3

What kind of language is C#?

Answer 3

“C# is a cross-platform

Question 4

What are C#’s ecosystem and workload benefits?

Answer 4

“C# has broad support in the ecosystem and is compatible with all .NET workloads.”

Question 5

What programming principles and paradigms does C# support?

Answer 5

“C# is based on object-oriented principles and incorporates features from other paradigms

Question 6

What low-level features does C# include?

Answer 6

“C# includes low-level features that support high-efficiency scenarios without requiring unsafe code.”

Question 7

What are most .NET runtime and libraries written in?

Answer 7

“Most .NET runtime and libraries are written in C#

Question 8

What is the purpose of the ‘Hello, World’ program in C#?

Answer 8

“The ‘Hello

Question 9

Write a single-line ‘Hello, World’ program in C# using top-level statements.

Answer 9

”// This line prints ‘Hello

Question 10

What does a single-line comment in C# look like?

Answer 10

“Single-line comments in C# start with // and continue to the end of the current line.”

Question 11

What does a multi-line comment in C# look like?

Answer 11

“Multi-line comments in C# start with /* and end with */.”

Question 12

What does the WriteLine method do?

Answer 12

“The WriteLine method of the Console class produces the output of a program. It is part of the System namespace.”

Question 13

Write a ‘Hello, World’ program with a Main method in C#.

Answer 13

“using System;\n\nclass Hello\n{\n static void Main()\n {\n // This line prints ‘Hello

Question 14

What does a ‘using’ directive in C# do?

Answer 14

“A ‘using’ directive references a namespace

Question 15

What is the purpose of namespaces in C#?

Answer 15

“Namespaces provide a hierarchical means of organizing C# programs and libraries.”

Question 16

What is the role of the static modifier in C# methods?

Answer 16

“The static modifier indicates that a method operates without reference to a particular object

Question 17

What is the entry point for a C# program without top-level statements?

Answer 17

“The entry point is a static method named Main when there are no top-level statements.”

Question 18

How does the compiler handle top-level statements in C#?

Answer 18

“When using top-level statements

Question 19

Where can you start learning C# as a beginner?

Answer 19

“Beginner tutorials and links in C# documentation are good starting points. Experienced developers can also read tips for transitioning from Java

Question 20

What makes C# approachable for developers?

Answer 20

“C# is approachable for beginners and offers advanced features for experienced developers writing specialized applications. Developers can quickly become productive and learn more specialized techniques as needed.”

Question 21

What memory management benefit does C# provide?

Answer 21

“C# apps benefit from the .NET Runtime’s automatic memory management and extensive runtime libraries provided by the .NET SDK.”

Question 22

What are platform-independent libraries in .NET?

Answer 22

“Platform-independent libraries in .NET include file system libraries

Question 23

What are some workload-specific libraries in .NET?

Answer 23

“Workload-specific libraries include ASP.NET Core web libraries and the .NET MAUI UI library.”

Question 24

What is NuGet, and how does it relate to C#?

Answer 24

“NuGet is a rich open-source ecosystem that augments the libraries provided by the .NET runtime with additional components.”

Question 25

How is C# syntax familiar to developers?

Answer 25

"C# syntax is familiar to those who have used C

Question 26

What type of language is C#?

Answer 26

"C# is a strongly typed language where every variable's type is known at compile time

Question 27

What are C#'s fundamental data types?

Answer 27

"C# includes value types like int

Question 28

What is the purpose of the record modifier in C#?

Answer 28

"The record modifier in C# allows the compiler to synthesize code for equality comparisons for struct or class types."

Question 29

What features define C#'s object-oriented behavior?

Answer 29

"C# supports object-oriented techniques like inheritance

Question 30

What are exceptions in C#, and how are they handled?

Answer 30

"C# uses exceptions to report and handle errors. Exceptions can be thrown to indicate failure and handled using try-catch blocks to recover."

Question 31

What is LINQ in C#, and what does it do?

Answer 31

"LINQ (Language Integrated Query) provides a unified syntax to query or transform collections of data regardless of storage type

Question 32

Write a LINQ query to find students with a GPA greater than 3.5.

Answer 32

"var honorRoll = from student in Students\n where student.GPA > 3.5\n select student;"

Question 33

What is asynchronous programming in C#, and what keywords does it use?

Answer 33

"Asynchronous programming in C# uses the async and await keywords to write code that reads as though it runs synchronously but executes asynchronously."

Question 34

Write a C# method using async to get the length of a web page.

Answer 34

"public static async Task GetPageLengthAsync(string endpoint)\n{\n var client = new HttpClient();\n var uri = new Uri(endpoint);\n byte[] content = await client.GetByteArrayAsync(uri);\n return content.Length;\n}"

Question 35

What is an await foreach statement in C#?

Answer 35

"The await foreach statement in C# iterates over a collection backed by asynchronous operations

Question 36

Write an example of an async iterator in C#.

Answer 36

"public static async IAsyncEnumerable ReadSequence()\n{\n int index = 0;\n while (index < 100)\n {\n int[] nextChunk = await GetNextChunk(index);\n if (nextChunk.Length == 0) yield break;\n foreach (var item in nextChunk) yield return item;\n index++;\n }\n}"

Question 37

How can an async iterator be used in C#?

Answer 37

"await foreach (var number in ReadSequence())\n{\n Console.WriteLine(number);\n}"

Question 38

What is pattern matching in C#?

Answer 38

"Pattern matching in C# enables you to inspect data and make decisions based on its characteristics using a concise and expressive syntax."

Question 39

Write a C# method using pattern matching for a boolean OR operation.

Answer 39

"public static bool Or(bool left