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Q1: If we want that our users may not access our database server directly from client computer, which client server architecture is best? Explain your answer logically. (in details)

Q2: Provide an example of system and its components and draw its diagram. Your example should not be from book. (in details)

Q3 Convert Decimal Number (65630)₁₀ to equivalent Hexadecimal Number, Octal and Binary Number. (in details)

Answer 1

Ans 1) There are two types of client-sever architecture

a.Two tier architecture b. Three tier architecture

A software application is created using programming language (called as frontend) and database(called as backend).In every software we have to implement following three layers

1.User Layer(presentation layer)

  It is also called as client layer which contain user interface of our application.This layer is used for design purpose.In this data is presented to the user and also input can accepted from user.

2.Business Layer

This layer is also know =n as business layer.In this layer we can write all business logic like validation of data,calculations,data insertion etc,This acts as an interface between client layer and Data Access Layer.

3.Data Layer

In this layer actual database is comes in the picture.Data Access Layer contains methods to connect with database and to perform insert,update,delete,get data from database base on our input data.

--> If you want that our users may not access our database server directly from client computer then Three tier architecture is the solution for that

• .In this architecture the user layer,business layer and data layer are implemented independently by three different application.
• The data required by the business login exists in database server.
• In three tier architecture all layers interact with each other independently.

In two tier architecture layers means where the is to be store at the client side or the server is generally store at client side for fast and reliable result. So it can be accessible to the other user also in peer to peer transition.But this is not happened in three tier architecture the separate layer maintain so that they are first authenticate by the serve whenever the user try to access the data.

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Ans 2)->

A typical computer system consists of a computercase, a power supply unit, a motherboard, a central processing unit (CPU), main memory, and a hard disk drive. Input devices include a keyboard, mouse, microphone, video camera, and image scanner. Output devices include a monitor, speakers, and a printer.

Some hardware components are easy to recognize, such as the computer case, keyboard, and monitor. However, there are many different types of hardware components. In this lesson, you will learn how to recognize the different components and what they do.

Hardware Components

Let's start with the computer case. This is the metal enclosure that contains many of the other hardware components. It comes in various shapes and sizes, but a typical tower model is between 15-25 inches high. Want to know what's inside? Okay, go get a screwdriver and let's open it up. Seriously, if you are really into computers, the best way to learn is to actually get hands-on. To save us some time, however, have a look at this desktop computer case. A computer enthusiast replaced the metal side panel with a transparent one, so we can have a look inside.

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Ans 3)

Decimal no. is converted into hexadecimal by dividing decimal no. by 16 and the remainder will note down. then if the result is not zero then again it will divide by 16 till the result become zero after this the remainder will note down from last to first.

Division Result Remainder

65630/16 4101 14 (E)

4101/16 256 5

256/16 16 0

16/16 1 0

1/16 0 1

Ans= (65630)₁₀ = (1005E)₁₆

To convert decimal no. to the octal no. there is the same process

Division result Remainder

65630/8 8203 6

8203/8 1025 3

1025/8 128 1

128/8 16 0

16/8 2 0

2/8 0 2

Ans=   (65630)₁₀ = (200136)₈

For converting decimal no. to the binary no.

65630	/	2	result	32815	remainder	0
32815	/	2	result	16407	remainder	1
16407	/	2	result	8203	remainder	1
8203	/	2	result	4101	remainder	1
4101	/	2	result	2050	remainder	1
2050	/	2	result	1025	remainder	0
1025	/	2	result	512	remainder	1
512	/	2	result	256	remainder	0
256	/	2	result	128	remainder	0
128	/	2	result	64	remainder	0
64	/	2	result	32	remainder	0
32	/	2	result	16	remainder	0
16	/	2	result	8	remainder	0
8	/	2	result	4	remainder	0
4	/	2	result	2	remainder	0
2	/	2	result	1	remainder	0
1	/	2	result	0	remainder	1

Ans= (65630)₁₀ = (10000000001011110)₂

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