Samsung Galaxy S GT-19000 model has 1 GHz processor and operating system which is used in Android 2.1. This model has all latest 3G technology like HSDPA 7.2 / HSUPA 5.76, WI-FI 802.11, Bluetooth V3.0 with A2DP. It is a touch sensitive mobile which includes accelerometer and GPS. The mobile phone has browser compatible and it is icon grid interface phone.

• It has Memory capacity of 16 GB
• We can have external memory up to 32 GB in MicroSD.
• It has 5 mega pixel cameras with photo and video recording of 720p HD at 30 Frames per second.
• It has digital zoom option for video recording and video playback.
• It has the option to playback files in FLAC and MKV format.

Messaging has both SMS and MMS option GSM is also possible through IM and you can also send Emails through Push mail. You can use polyphonic ring tones as well as Mp3 it has Mp3 player and FM stereo. It is a ideal phone for the music lovers and it supports messaging and mailing system and it can be also used for official use.

• The Nokia 6303i classic is generally having the 2G network of GSM 900 / 1800 / 1900.
• The dimension size of 6303i is 108.8 x 46.2 x 11.7 mm, 57cc.
• It has just 96g weight.
• The Nokia 6303i display size is 240 x 320 pixels, 2. 2inches; display type is TFT, 16M colors.
• Nokia 6303i Sound system is 3.5 mm audio jack; it has speaker phone, alert type vibration and MP3 ring tones.
• We can store up to 2000 entries in phonebook and photo call option also available in Nokia 6303i.
• It can have called records up to 20 dialed, 20 received, 20 missed calls.
• It has 55 MB internal memory.
• It has a memory card slot for micro SD memory card up to 16 GB, and you can get 2 GB memory card with your mobile.
• GPRS of class 32, EDGE of class 32, v2.1 With A2DP Bluetooth, and it has been microUSB v2.0.
• The camera has 3.15 MP, 2048 x 1536 pixels resolution, and fixed focus, dual LED flash, QVGA@8fps video.

Features of Nokia 6303i

• It has features of SMS, MMS, Email, and IM.
• It has Browser WAP 2.0 / XHTML, HTML.
• It has Stereo Fm radio with RDS features.
• It has 8 games and you can also download.
• The colors are available steel, Matt Black, chestnut, illuvial pink, white on silver, Khaki on Gold.
• It has the feature’s java MIDP 2.1, Nokia Maps 2.0.
• It has features H.263. / H.264 Player, MP3 / WAV / eACC + / WMA player, Organizer, flash Lite 3.0, Voice memo / dial, T9.
• Li-Lon 1050 mAh (BL-5CT) Standard battery, the battery will stand up to 515 hours, talk time up to 8 hours and music play up to 30 hours.

In the market, there are several Bluetooth are in sales, in that wireless Bluetooth headphones are also one of the Bluetooth devices. The normally used wireless headphone is 2.4 GHz RF, which is equally similar to WI-FI or WLAN. The Bluetooth’s Headsets has many benefits like rising connectivity and great mobility. There are some reasons for using Bluetooth, it differs from a person to a person but there are some common things are relevant to all those use Bluetooth.

The basic function that highlights the wireless headsets is mobility. Everyone can easily walk using these headsets and talk to call and listen to the music even without carrying your mobile phone and another benefit in using Bluetooth wireless headsets are hands free communication while keeping a device at a small distance.

There is a big advantage of wireless Bluetooth’s headsets that do not have wire. It is so easy to handle when we compare it to wired headsets. Consumer is pleased with voice control options and voice signature effects provided in latest Bluetooth wireless headsets.

Stream direct TV that has guaranteed for great quality of picture and sound, and it is easy to install, and you can search channels very easily. Using stream direct TV you can watch good programs like cartoons, news, movies, drama, serials from different countries. If you compare the stream direct TV with other live TV channels in internet you will identify that stream direct TV is the best live TV channels that give quality of pictures and sounds that has been never seen in other live TV channels. Through a stream direct TV you can watch more than 4500 HD quality TV Channels from your computer, you can watch TV shows, Movies, etc.

There are many benefits of using stream direct TV in PC, and you have a benefit that you can get the unlimited number of channels from worldwide. You can watch your favorite service, and also you can watch more channels from other countries by sitting from your home. You can as well watch TV when you are in travel with the help of a stream direct TV in your laptop.

This is a 100% legal service for PC, and it is very easy to use when you buy a satellite TV for PC, you can download the software in your PC with in a minute. To download software you should pay one time fee for using a stream direct TV service. Then you can use this service as much as you like without paying any money for the service, and it is highly recommended a service for PC to watch TV on various channels worldwide.

Sony Ericsson F305 is a 2G network it uses the Global System for Mobile Communications (GSM) 850 / 900 / 1800 / 1900, this model was announced at June 2008, and model came to sales in Nov 2008.

Size and Display

The dimensions of Sony Ericsson are 96 x 47 x 14.6 mm, and it is just only 97.5 g and its display type is Thin Film Transistor (TFT) and use 256 k colors, the size of the display is about 2.0 inches and 176 x 220 pixel resolutions.

Sound quality of Sony Ericsson F305

In Sony Ericsson F305 the sound quality is good, and it uses an alert type as downloadable polyphonic tones, you can download MP3 songs and keep as your ring tones, you can also use an advance audio coding (AAC) ring tones. You can also use vibrating when you’re in some important meeting. Sony Ericsson F305 also has a speaker phone option.

Memory allocation and Data transfer

Sony Ericsson F305, you can use a phonebook to note done 1000 entries of contact phone numbers, photo call, in call record option you can have a record received calls, 30 dialed calls, and 30 Missed calls, in the internal memory you can store a data up to 10 MB, you can use a memory card also to store a data, memory stick micro (M2) is used in Sony Ericsson F305, you can put the memory card to 4 GB. In this model, you can transfer a data through GPRS, EDGE, and Bluetooth v2.0. with A2DP, USB. In the model it uses a standard battery, Li-lon, the battery will power will stand up to 400 h in stand by mode, and in talk time it will stand up to 8 h.

Camera Features

• It uses a 2 mega pixel lens.
• The camera resolution is up to 1600 x 1200 Pixels.
• It has a video option.

Features of Sony Ericsson F305

• It has features for messaging like SMS, MMS, Email, instant messaging. uses a browser like WAP 2.0 / XHTML.
• It has stereo FM radio with RDS.
• It has a game option also. It incl, motion – based + downloadable.
• It has a java feature like MIDP 2.0, MP3   TrackID music recognition, Picture editor / blogging, Organizer,  memo/dial

With plasma televisions quickly becoming the standard television of the day the prices are constantly coming down and the demand for plasma is going up.

Advantages of plasma TV:

Plasma TVs are widely popular, due to the advantages they offer. In this article, we’ll go over a few of the pros and cons of Plasma screens, as well as tips for buying a plasma TV.

• Plasma screens are very shallow. Usually the screen will take up about 2 inches, and the entire TV or finished screen will be just a few inches deep. This means that your TV takes up very little room, and is easily mounted on a wall.
• Plasma screens also have an excellent contrast, and can display nearly perfectly dark black. Plasma screens can also display very bright colors. This makes them ideal for watching movies.
• Plasma screens can also come in extra large sizes. The largest plasma screen in the world is 103 inches across. You can easily buy plasma screens up to about 65 inches.

Disadvantages of plasma TV:

Even though they have some significant advantages they do have some remarkable disadvantages on the other hand.

• Plasma screens begin losing their brightness after about 2,000 hours of use. The latest model plasma screens will be half as bright as they originally were after about 60,000 hours of use.
• Plasma screens are very fragile, so they are hard to install and ship. Of course, they are also at an increased risk of breaking.
• Above about 6,000 elevations, Plasma screens will emit a humming noise. Very few people will have an issue with this, though, as very few people live above 6,000 feet elevation.

OSI reference Model layers

There are 7 layers in OSI reference model, starting from the bottom Physical Layer, Data Link layer, Network Layer, Transport Layer, Session Layer, Presentation layer and Application layer. These are the following layers in OSI reference model, each layer does not define one protocol osi defines any number of protocol therefore each layer consists of multiple protocols each provides a unique service in aligning with the function of that layer.

Role of OSI in data communications model

Basically OSI has 7 layers clearly states the functions of data communication protocols very accurately and clearly.  Whenever the data is transferred between co-operating applications across a Intervening network each layer of OSI represents a function and identifies each by its name and provides a short snippet of information for it.

What are Addressing, Routing and Multiplexing?

To transfer the data from two different hosts, you need to shift the data across the network to the exact host and from there you need to navigate to the exact user or process. This can be achieved by Addressing, Routing and Multiplexing.

Addressing

These are IP addresses, which help to identify each and every host across the network. Helping the data to reach the correct host.

Routing

It is a process of moving the data packets from source to the end point.

Multiplexing.

Multiplexing plays an important role in delivering data to the correct source, or module within the host. These three functions are addressing between hosts, routing between networks, and multiplexing.

Protocol and port numbers deliver data to the correct software module within the host.

Each of these functions – addressing between hosts, routing between networks, and multiplexing.

When realized in a computer program, the ADT is represented by an interface, which shields a corresponding implementation. Users of an ADT are concerned with the interface, but not the implementation, as the implementation can change in the future.

Construct abstract data types

The term abstract data type is about as dry and technical sounding as you can get. Yet the concept of an abstract data type, is something we should apply in every single one of our application efforts, sometimes without even realizing that we are doing it. An abstract data type is a collection of information and operations that act on that information. An ADT can represent computer objects such as lists, records, stacks, arrays, and tables; but an ADT can also represent real world objects, such as a company, a product or the set of assembly line operation at a factory.

PL/SQL offers several different constructs with which to build and manage ADTs, most importantly the package. The most general description of an ADT, in fact, sounds just like the description of a package: a collection of data and operations on that data.

Build an ADT in phases

There are four phases to build ADT, they are

• Clarify the data to be represented by the ADT. Make sure you understand all the attributes of the data and the way it is used in your application.
• List the key features and functions of the ADT as it relates to the underlying data. Don’t write any code until you have come up with a comprehensive list of all the operations on and by the ADT.
• Build the interface for the ADT. This is equivalent to designing the specification of all the modules, which are called by programmers to manipulate the ADT. Translate the list of features into procedure and function calls.
• Build the body of code behind the interface. You know how programmers will manage the ADT, since they must work with the specification. The final phase is to actually implement the ADT.

Client side testing

Testing the new query

When you are testing a new query you should test the query by running it. If all goes well, the new query will run rather quickly and you should inspect all the record in the table of results.

Server side testing

On part of SQL server testing, it is totally different when compared to other types of testing, we can have following as major portions of SQL server testing.

Code compliance testing

In code compliance testing, the code will be checked in compliance with requirements, developer can develop the code in different ways for a requirement. When a piece of code arrives to tester, he has to look into the following areas in SQL server code compliance testing

• Parameter passage: These plays very important with data type and length, parameter movement.
• Code blocking: Faster code will leave the begin and end for single statement, when code is changed or modified and a code will execute even though condition fails, as a tester you should make sure that which code is in block and out of block.
• Condition/Loops: In this simple condition is easy to understand and long condition will put confuse to a developer. The meaning of loop will change with dowhile and while. As a tester you need to make sure that they are properly conditioned. We can put this under branch testing.
• Exception handling: This is very important area, which comes under range testing, every report has to be sent back to the caller, and either it is requested result or not.
• Code commenting/alignment: This is low priority task compared to others but plays very important role in future versions and maintenance of the code.
• Return values: For some of the code, returns values are mandatory and the return values should be in contest of requirement.

Performance testing

This is validating database administrator role, performance of piece of code plays major role in network based project, after code is in-compliance with the requirement.

• SQL Queries: This is the closure area where you will be looking for optimization of code; queries are source of interacting data on SQL server, SQL queries can be written in different forms and some of the queries will be differentiated only with execution plan to identify the optimized one.
• Indexing: This is area where performance could be increased for the requested queries
• Bulk transaction: When there is bulk data transaction we must sure that certain objects are disabled.
• Clustering: SQL server clustering can provide fault tolerance for many aspect of a SQL server, such as hardware, network, operating system and application failure, make sure that it will not affect the performance and database is clustered on required portions.
• Database designing: This is the basic area to look for optimization; too much normalization will affect the performance.
• Data types: the lazy designers always use the maximum data type’s usage. In data types valid or invalid and use varchar (8), these data type will consume more memory, which is not used by the code but still occupying, which will intern increasing the paging.
• Locking/Unlocking: Some of the code will lock certain portions and until it is released other operations are not performed.

Integration testing

In order to get certain portions of data, we may require integration of different server and following are major areas to look on aspect of integration

• Calling of external stored procedure
• Usage of multiple servers

Protocol

Communication between computer in network or a different network requires certain set of rules called protocols.

Socket

Socket can be understood as a place used to plug in just like electric sockets.

Client/Server

A computer, which requests for some service from another computer is called client. The one that processes the request is called as server.

Internet address

Every computer connected to a network has a unique IP address. An IP address is a 32 bit number which has four number separated by periods. It is possible to connect to the Internet either directly or by using Internet service provider.

Domain naming service

It is very difficult to remember a set of number to connect to the Internet. The domain naming service is used to overcome this problem. It maps one particular IP address to a string of characters.

Inet address

There are classes provided in java to enable networking. They are found in the java.net package. InetAddress is one such class, which is used to encapsulate the IP address and the DSN. To create an instance of InetAddress class factory method are used, as there are no visible constructors available for this class. Factory methods are conventions where static methods return an instance of that class.

Datagram

Datagram is type of packet that represents an entire communication. There is no necessity to have connection or disconnection stages when communicating using Datagram. There are two classes in java, which enables communication-using Datagram.

• Datagram packet is the class, which acts as the data container
• Datagram socket is a mechanism used to send or receive Datagram packets.

TCP/IP

TCP/IP sockets are the most reliable, bi-directional, stream protocols. It is possible to send arbitrary amount of data using TCP/IP. Sockets are used for data communication using this protocol. There are two kinds of sockets in java – a server and client.

• A socket class object establishes connection between the client and the server.
• The server socket class object waits for the client to make a connection.