About Server and Primitive Data types

Server:

• A server is a computer program or device that provides a service to another computer program and its user, also known as the client.
• In a data center, the physical computer that a server program runs on is also frequently referred to as a server.
• In the server/client programming model, a server program awaits and fulfills requests from client programs, which might be running in the same, or other computers.
• A server is a computer connected to a network of other workstations called ‘clients’. Client computers request information from the server over the network. Servers tend to have more storage, memory and processing power than a normal workstation.

Client-Server Model:

• In a client/server network there is one server that is only dedicated to provide services to the other client workstations. You can have multiple servers in these networks but they can not function as workstations.
• The client relies on sending a request to another program in order to access a service made available by a server. The server runs one or more programs that share resources with clients.
• The client server relationship communicates in a request–response messaging pattern.
• TCP protocol maintains a connection until the client and server have completed the message exchange.
• TCP protocol determines the best way to distribute application data into packets that networks can deliver, transfers packets to and receives packets from the network, and manages flow control and retransmission of dropped packets.

Server Request Types:

• Static request : There is no change in the content. Client requests a web page and server gets the page back as response.
• Dynamic request : The page content changes frequently. Server may not be able to process the request.

Response for dynamic request:

• The client sends the Dynamic request to the server.
• Server has web container Which is helper application for server.
• web container uses a file called as web.xml to detect which servlet to call, after that it calls the servlet.
• That servlet process the information(request).
• And then it will send the response to the client.(tbd)

Statically typed programming language and dynamically typed programming language:

Statically typed languages perform type checking at compile-time, while dynamically-typed languages perform type checking at run-time.

Statically-typed languages require you to declare the data types of your variables before you use them, while dynamically-typed languages do not.

Primitive Datatypes :

Data Type	Size	Description
byte	1 byte	Stores whole numbers from -128 to 127
short	2 bytes	Stores whole numbers from -32,768 to 32,767
int	4 bytes	Stores whole numbers from -2,147,483,648 to 2,147,483,647
long	8 bytes	Stores whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
float	4 bytes	Stores fractional numbers. Sufficient for storing 6 to 7 decimal digits
double	8 bytes	Stores fractional numbers. Sufficient for storing 15 decimal digits
boolean	1 bit	Stores true or false values

public class Library{
	public static void main(String[]args){
	short age = 50;
	int salary = 100000;
	float exp=16.8f;
	boolean fresher= false;
	char emp='C';
	
Library librarian=new Library(); //"new" allocates memory 
	System.out.println(salary);
	System.out.println(age);
	System.out.println(exp);
	System.out.println(emp);
	}
	
}

output

Features of my Android Phone:

SAMSUNG Galaxy M11 (Black, 64 GB) (4 GB RAM)

Processor Type	Qualcomm Snapdragon (SDM450-F01) (tdb)
Processor Core GPU	Octa Core 1.8 GHz Cortex-A53 Adreno 506
Processor speed	1.8GHZ
weight(g)	197
Display Type Size Resolution	6.40 inch PLS IPS 6.4 inches, 100.5 cm2 720 x 1560 pixels
Memory	64GB 4GB RAM
OS	Android 10, upgradable to Android 11
CAMERA Features video	3 MP, f/1.8, 27mm (wide) 5 MP, f/2.2, 14mm (ultrawide) 2 MP, f/2.4, (depth) LED flash, panorama, HDR 1080p@30fps
BATTERY CHARGING	Li-Ion 5000 mAh, non-removable Fast charging 15W
SENSOR	Fingerprint (rear-mounted), accelerometer, proximity

How to make my computer as server?

We can make our computer as server with the help of Apache software.

References:

Server: https://whatis.techtarget.com/definition/server

Client-Server model: https://www.omnisci.com/technical-glossary/client-server

Servlet: https://youtu.be/OuBUUkQfBYM