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Sha Sheikh's Questions & Answers

in Computers & Technology, Computers & Accessories& Cars & Bikes

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What is MVC architecture?give its benefits.?

Asked by Payal Sharma in Computers & Technology at 9:46 AM on February 04, 2009

Sha Sheikh's Answer

In object-oriented programming development, model-view-controller (MVC) is the name of a methodology or design pattern for successfully and efficiently relating the user interface to underlying data models. The MVC pattern is widely used in program development with programming languages such as Java, Smalltalk, C, and C++. In MVC, the model represents the information (the data) of the application; the view corresponds to elements of the user interface such as text, checkbox items, and so forth; and the controller manages the communication of data and the business rules used to manipulate the data to and from the model.

The MVC architecture has the following benefits:

* Multiple views using the same model. The separation of model and view allows multiple views to use the same enterprise model. Consequently, an enterprise application's model components are easier to implement, test, and maintain, since all access to the model goes through these components.

* Easier support for new types of clients. To support a new type of client, you simply write a view and controller for it and wire them into the existing enterprise model.

Answered at 10:02 AM on February 04, 2009

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What is meant by Dynamic Host Configuration Protocol?

Asked by Payal Sharma in Computers & Technology at 9:46 AM on February 04, 2009

Sha Sheikh's Answer

DHCP (Dynamic Host Configuration Protocol) is a communications protocol that lets network administrators centrally manage and automate the assignment of Internet Protocol (IP) addresses in an organization's network. Using the Internet Protocol, each machine that can connect to the Internet needs a unique IP address, which is assigned when an Internet connection is created for a specific computer. Without DHCP, the IP address must be entered manually at each computer in an organization and a new IP address must be entered each time a computer moves to a new location on the network. DHCP lets a network administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place in the network.

Answered at 10:02 AM on February 04, 2009

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What is meant by dynamic-link library ?

Asked by Payal Sharma in Computers & Technology at 9:46 AM on February 04, 2009

Sha Sheikh's Answer

A dynamic link library (DLL) is a collection of small programs, any of which can be called when needed by a larger program that is running in the computer. The small program that lets the larger program communicate with a specific device such as a printer or scanner is often packaged as a DLL program (usually referred to as a DLL file). DLL files that support specific device operation are known as device drivers. The advantage of DLL files is that, because they don't get loaded into RAM together with the main program, space is saved in RAM. When and if a DLL file is needed, then it is loaded and run.

Answered at 10:01 AM on February 04, 2009

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What is meant by dynamic volume?

Asked by Payal Sharma in Computers & Technology at 9:47 AM on February 04, 2009

Sha Sheikh's Answer

A Dynamic drive contains dynamic volumes rather than partitions, making it possible to have an unlimited number of logical drives. Another big difference between basic and dynamic disks is there is no Master Boot Record (MBR) on a dynamic disk. Instead, it stores the layout of the disk volumes in a database stored on the last 1 MB of the disk. Dynamic disks allow you to create a number of different disk structures that aren't available on basic disks. For example; Simple Volume (A dynamic volume that's composed of disk space from a single dynamic disk.), Spanned Volume (A dynamic volume that uses disk space on more than one physical disk), Striped Volume (A dynamic volume that stores data in stripes across two or more physical hard drives), Mirrored Volume (A volume that duplicates the data on two physical disks), RAID-5 Volume (it consists of data and parity sets that are striped across multiple hard disks.).

Answered at 10:01 AM on February 04, 2009

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I hv 512 MB ram,80GB hdd sata ,945 intel chipset maderboard ,desktop using vista.how can i increese my pc's speed without adding ram(pc in best performence mod)

Asked by Payal Sharma in Computers & Technology at 9:47 AM on February 04, 2009

Sha Sheikh's Answer

The graphic user interface on Vista is called Aero, and it is the Vista component that degrades performance more than any other. Some of the tweaks you might want to modify are the following.

Remove Aero Altogether - This is best for computers that barely meet the minimum system requirements to run Vista. You can choose to remove Aero altogether and switch to either Windows Vista basic theme or Windows Classic theme. To apply this option, simply right-click on the desktop and choose Personalize. Now choose Windows Color and Appearance, click Classic Appearance Properties, and choose a theme. Just click OK to apply it.

Remove the Transparency Feature - Although this feature looks great, it can reduce performance. Right-click on the desktop and click Personalize. Now click Windows Color and Appearance. Just uncheck the Enable Transparency option, and click OK to apply it.

Remove the Sidebar Feature - The sidebar feature really hits performance, especially with all those gadgets. To remove this feature right-click on the sidebar and click Properties. Now uncheck Start Sidebar When Windows Starts, and click OK.

Other Visual Features - As you can see in the Performance Option window, there are quite a few visual features that can be disabled, thus helping you increase speed and performance.

Anyways, your RAM (512MB) is inadequate for running Vista. If possible, try to upgrade it to at least 1GB RAM. If not, refer to this guide for more details:

http://www.tech-faq.com /how-to-speed-up-vista.shtml

Answered at 10:01 AM on February 04, 2009

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What is meant by dynamic update?

Asked by Payal Sharma in Computers & Technology at 9:47 AM on February 04, 2009

Sha Sheikh's Answer

"Dynamic update" enables DNS client computers to register and dynamically update their resource records with a DNS server whenever changes occur. This reduces the need for manual administration of zone records, especially for clients that frequently move or change locations and use DHCP to obtain an IP address. The DNS Client and Server services support the use of dynamic updates, as described in Request for Comments (RFC) 2136, "Dynamic Updates in the Domain Name System."

Reference from: technet.microsoft.com/en-us/library /cc784052.aspx

Answered at 10:01 AM on February 04, 2009

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What is the role of DBA?

Asked by Payal Sharma in Computers & Technology at 9:48 AM on February 04, 2009

Sha Sheikh's Answer

I believe, pretty strongly, The Database Administrator (DBA) is responsible for designing, developing and implementing programs, as required, to support the technical capabilities. The DBA should be responsible for all aspects of database work from administration tasks to new development work and should be directing the efforts of the junior database team members. As a DBA, one could expect to Develop new or maintain existing databases based on specifications. Share knowledge by effectively documenting work. Respond quickly and effectively to production & development issues and taking responsibility for seeing those issues through resolution. Resolve database performance issues, database capacity issues, replication, and other distributed data issues. Hands on and ownership personality..

Answered at 10:00 AM on February 04, 2009

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What is meant by drop folder?

Asked by Payal Sharma in Computers & Technology at 9:48 AM on February 04, 2009

Sha Sheikh's Answer

A shared subdirectory on a server in the network used to store data for subsequent processing. For example, a drop folder could be used to receive e-mail messages, faxes or print jobs from users. It can also refer to a folder on the desktop that icons are dragged to "dropped" in to start some action. For example, dropping a document into a print folder would print the document.

Answered at 10:00 AM on February 04, 2009

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What is meant by dual boot?

Asked by Payal Sharma in Computers & Technology at 9:48 AM on February 04, 2009

Sha Sheikh's Answer

A dual boot in a computer system is which two operating systems are installed on the same hard drive, allowing either operating system to be loaded and given control. When you turn the computer on, a boot manager program displays a menu, allowing you to choose the operating system you wish to use. A boot manager works by replacing the original Master Boot Record (MBR) with its own so that the boot manager program loads instead of an operating system. Common combinations of operating systems used on dual boot systems include any latest Windows OSes (XP, Vista) and Linux distros.

Answered at 10:01 AM on February 04, 2009

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What is meant by duplex?

Asked by Payal Sharma in Computers & Technology at 9:48 AM on February 04, 2009

Sha Sheikh's Answer

In telecommunication, duplex communication means that both ends of the communication can send and receive signals at the same time. full-duplex communication is the same thing. half-duplex is also bidirectional communication but signals can only flow in one direction at a time. An ordinary telephone conversation is a duplex communication. Most inexpensive speakerphones/walkie talkies are half-duplex communication. (If you're speaking, you can't hear anyone else interrupt. You have to pause to let others speak.)

Answered at 10:01 AM on February 04, 2009

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