C# Programming Basics Quiz

Introduction to C#

• Variable declaration in C#: Use int number = 10; as correct syntax.
• C# source code files have the extension .cs.
• The keyword function is not recognized in C#.
• The bool data type is used for true/false values.
• Console output is displayed using System.Console.WriteLine().
• The new keyword creates a new object in C#.
• The namespace keyword combines multiple classes under a single identifier.
• Default value of an unassigned integer (int) is 0.
• Size of an int in C# is 4 bytes.
• Strings are correctly created with syntax: string name = "John";.
• Comments in C# are initiated with // and can also be enclosed in /*...*/.
• The Main() method serves as the entry point for program execution.
• Classes in C# are reference types, capable of containing methods.
• To access a base class method, use the base keyword.
• Use sealed to prevent a class from being inherited.

Variables and Data Types

• int is classified as a value type in C#.
• To declare a constant, use: const int MY_CONST = 10;.
• float and double can both store decimal values.
• array is not a primitive data type in C#.
• Arrays in C# are reference types and cannot store multiple data types.
• A single-dimensional array is declared as: int[] arr = new int[5];.
• After execution of int x = 5 + 2 * 3;, the value of x equals 11.
• Nullable types in C# are declared using the ? symbol.
• Initialize a char using single quotes: char letter = 'A';.
• To convert a string to an integer, use int.Parse().

Test your knowledge of the fundamentals of C# programming with this set of 60 multiple-choice questions. Covering topics from variable declaration to conditional statements, this quiz will help reinforce your understanding of C# concepts.