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What is computer?
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A computer is an electronic device that processes data using instructions stored in its memory, enabling it to perform various tasks, calculations, and functions.
Managed code and unmanaged code are terms used in the context of C# and the .NET framework to describe how the code is executed and managed by the runtime environment. Here's an explanation and an example of each: 1. Managed Code: - Managed code refers to code that is executed within the .NET Common Language Runtime (CLR) environment. The CLR provides various services such as memory management, type safety, and garbage collection. - C# code is typically considered managed code because it is compiled into an intermediate language (IL) that is executed by the CLR. Example of managed code in C#: ```csharp using System; class Program { static void Main() { Console.WriteLine("This is managed code executed by the CLR."); } } ``` 2. Unmanaged Code...
In C#, a hash table is implemented using the `Hashtable` class or, more commonly, the `Dictionary<TKey, TValue>` class in the `System.Collections.Generic` namespace. Both are used for storing key-value pairs, but `Dictionary<TKey, TValue>` is more type-safe and generally preferred over `Hashtable`. ### When to use a hash table (Dictionary in C#): 1. Fast Retrieval: Hash tables provide fast retrieval of values based on their associated keys. This is particularly useful when you need quick access to data based on some identifier. 2. Unordered Collection: If the order of elements doesn't matter, and you need to store and retrieve data based on unique keys, a hash table is a good choice. 3. Associative Mapping: When you want to establish an association between keys and values, such as mapping usernames to user profiles or IDs to corresponding objects. 4. Efficient Search: Hash tables provide O(1) average time complexity for retrieval, making them efficient for s...
Garbage collection in C# is the automatic process of managing memory by identifying and reclaiming objects that are no longer needed, freeing up memory for reuse. It helps prevent memory leaks and makes memory management more efficient. Here's a simple example: ```csharp class MyClass { public int Data; public MyClass(int value) { Data = value; } } class Program { static void Main() { MyClass obj1 = new MyClass(42); // Create an object MyClass obj2 = new MyClass(84); // Create another object // Now, let's assume we no longer need obj1 obj1 = null; // Set obj1 to null to indicate it's no longer referenced // At this point, the garbage collector may identify obj1 as unreachable // a...
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