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Sudipta Deb's Questions & Answers

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Questions Asked: 26

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how to search any word in foxpro data file by using programme?

Asked by nimesh vora in Computers & Technology at 12:31 PM on October 09, 2008

Sudipta Deb's Answer

One way for an enterprise-wide application to take advantage of Visual FoxPro is to use the Visual FoxPro database engine for storing and managing data. This provides high-performance storage and query capability to other programs.

Programs can connect to Visual FoxPro data using the Visual FoxPro OLE DB provider. This provider exposes the Visual FoxPro database engine to standard VFP SQL commands.

For example, an application might use Microsoft Excel as a calculation tool for complex data analysis. If the data to be manipulated is highly fluid, it might make sense not to store it in a worksheet, but in a database. The worksheet could then be written to use the Visual FoxPro OLE DB provider to connect to the database, extract the relevant information, and display it in a worksheet for further processing.

Another example might be a kiosk application, such as an information stand at an airport or convention center. You could create the information display using a multimedia authoring program. But if some of the data in the application changed often, it would be cumbersome to change pages in the presentation. Instead, the presentation program could connect to a Visual FoxPro database using the OLE DB provider, and then extract data at run time.

Answered at 2:04 PM on October 09, 2008

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How to Use RealVNC t oconnect to a computer on a private network over the internet...

Asked by 9985028456 in Computers & Technology at 12:40 PM on October 09, 2008

Sudipta Deb's Answer

Below are the steps to use:
1. Visit RealVNC to download the necessary software through this link. Choose the free edition. Note it asks you to enter you name and email address but will proceed without this information if you just push the next button. OR You can get UltraVnc from sourceforge. Click on 'Download' from the bar at the top of the site. This takes you to a page with several links (see step 2). UltraVNC is free, and has more features than the pay-for version of RealVNC but some may find it harder to set up. It's up to you.
2. If you chose RealVnc, download the version with both server and viewer onto the PC you wish to be controlled, and install. If you chose to use UltraVnc, then the link you want to click will look something like "Download UltraVnc-101-Setup.zip".
3. Download the viewer-only version onto any PC you wish to control the other computer with. For UltraVnc that would look like "Download UltraVnc-101-Setup.zip" While you could just install the combined server and viewer on every PC, you will get an extra measure of security by not installing the server software on any PC you do not wish to be contolled.
4. Make sure the server software is running on the PC to be controlled, and that it is connected to the network. The first time you run it, you will need to set a password for accessing the PC -- be sure to Choose a Secure Password.
5. Open the viewer software on the controlling PC. Here you will need to enter the name of the PC to be controlled (or its IP Address), if you know it. To learn its name, on the PC to be controlled (in Win XP) go to the control panel, and select system. Go to the Computer Name tab. The name is next to where it says "Full Computer Name:". Note you can disregard the period after the name.
6. Click "OK" after you have entered the name. It should now ask you for the password you set in step 4.
7. Voila! You should see the desktop of the controlled computer, and be able to operate it as if you were at its keyboard.
8. If for some reason this doesn't work, verify that a Firewall on either computer is not blocking the connection. A common port for VNC to use is port 5800.

Some tips :
* Make sure to read all the program's instructions and warnings on the site before installing, as this will often help prevent problems.
* Some anti-spyware programs will detect VNC programs as a PUP (Potentially Unwanted Program). This is because if someone else had installed VNC on your computer without your knowledge, they could control your computer. As long as you installed VNC yourself (or had someone do it for you), it is safe to ignore these warnings.
* These instructions are for Windows XP, but the software is available for Mac and Linux as well.
* The software is provided free by the people at RealVNC (or UltraVnc). You can pay for this service with websites such as GoToMyPC, but there is no need. You can also buy software for remote PC control, but try these free ones first to see if it meets your needs.
* If RealVNC doesn't fill your needs, it may be worth a try uninstalling it and using UltraVnc but it would be a good idea to have a computer-savvy friend help you out.
* If you have Windows XP professional on one of the computers (viewer or server), and XP pro or home on the other, you can use the built in Remote Desktop Control function. However, one of the PCs must be running XP professional.
* If you have problems installing and setting up these programs, try looking for a link that says "forums" or "message boards" or perhaps "contact" on the site from which you downloaded the VNC software. Here you will find people willing to help you through your troubles. Don't be discouraged if an impolite user calls your questions stupid - The open nature of the internet unfortunately gives these kind of people more or less free reign to be jerks,

Answered at 2:01 PM on October 09, 2008

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What is Future Trends of Firewall?

Asked by Vikas in Computers & Technology at 1:28 PM on October 09, 2008

Sudipta Deb's Answer

Hi Vikas,
Future of firewall or you can say the security is very bright. The Internet is, by far, one of the most significant achievement in recent history. When it was designed and started as Arpanet in 1970s, the Internet was never intended to be secure or open for commercial use. In the 1980s, the Internet was structured to accommodate 4.3 billion potential network addresses. It afforded roughly one address for every person on earth. Yet today, with more than 50 million users on-line, the address space is getting short. The solution, yet to be implemented and deployed, is the Internet Protocol v6 (IPv6), or IP next generation IPng. IPv6 will offer better security and performance and will allow a wide range (up to 3 X 1038) of nodes. Nodes will include almost any device anyone can imagine; even sensors, doors, and cars will have IP addresses so they can be controlled from afar. The Internet, as I hope, seems to be the infrastructure for the global village but without security, not only e- commerce is in danger, but also human lives could be at stake.

Answered at 1:59 PM on October 09, 2008

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how i will know that my ram is ddr1 or ddr2

Asked by Chetan R in Computers & Technology at 7:56 PM on September 29, 2008

Sudipta Deb's Answer

Crucial.com will show what your pc is made of. Otherwise you can take it out and on the sticker it may say ddr2 or ddr1. If not check against these websites attached

Also you can compare the two to each other. The ddr will look older and will be wider that the DDr2 and generally bigger parts. i think

Source:
http://shop. enigma.ba/images/ddr_ram.png
http://compeve.com/images/1GB_ compeve.jpg

Answered at 10:08 PM on September 29, 2008

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What is the correct procedure to clean any Keyboard?

Asked by Arun Pandian in Computers & Technology at 8:20 PM on September 29, 2008

Sudipta Deb's Answer

The simplest procedure is to replace the keyboard if it's a desktop -- they're cheap.

If it's a laptop, that's not so easy.

Most keyboards have removable keys -- be careful, pry up each key with a knife under the corner. Use compressed air or a vacuum cleaner to remove the dust, and rubbing alcohol (something without water!) on a Q-tip to remove the grime.

Then you might consider getting a keyboard cover or putting something over the keyboard when it's not in use. :)

Answered at 10:06 PM on September 29, 2008

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Advantages and DisAdvantages of Firewall?

Asked by Vikas in Computers & Technology at 1:30 PM on October 09, 2008

Sudipta Deb's Answer

Hi Vikas,

below are the advantages:

1. A feeling of increased security that your PC and contents are being protected.
2. Relatively inexpensive or free for personal use.
3. New releases are becoming user friendly.
4. You can monitor incoming and outgoing security alerts and the firewall company will record and track down an intrusion attempt depending on the severity.
5. Some firewalls but not all can detect viruses, worms, Trojan horses, or data collectors.
6. All firewalls can be tested for effectiveness by using products that test for leaks or probe for open ports.

below are the disadvantages:
1. Firewalls evolve due to cracker's ability to circumvent them increases.
2. "Always on" connections created by Cable and DSL connections create major problems for firewalls. This can be compared to leaving you car running with the keys in it and the doors unlocked which a thief may interpret as an invitation to "Please steal me".
3. Firewalls cannot protect you from internal sabotage within a network or from allowing other users access to your PC.
4. Firewalls cannot edit indecent material like pornography, violence, drugs and bad language. This would require you to adjust your browser security options or purchase special software to monitor your children's Internet activity.
5. Firewalls offer weak defense from viruses so antiviral software and an IDS (intrusion detection system) which protects against Trojans and port scans should also complement your firewall in the layering defense.
6. Some firewalls claim full firewall capability when it's not the case. Not all firewalls are created equally or offer the same protection so it's up to the user to do their homework.
7. Cost varies. There are some great free firewalls available to the PC User but there are also a few highly recommended products, which can only be purchased. The difference may be just the amount of support or features that a User can get from a free product as opposed to a paid one and how much support that user thinks he or she will require.
8. A firewall protection is limited once you have an allowable connection open. This is where another program should be in place to catch Trojan horse viruses trying to enter your computer as unassuming normal traffic.
9. There have been claims made by IDS (Intrusion Detection System) companies where Trojan's were detected such as the RuX FireCracker v 2.0 which disabled certain Firewalls programs thus leaving the PC vulnerable to malicious actions.

Hope this will help you
Source: http://www.sunshadowz.com/arti cles/firewalls_advantages.htm

Answered at 1:33 PM on October 09, 2008

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What's the estimated lifespan of a notebook PC? (for normal computing)

Asked by Arun Pandian in Computers & Technology at 8:26 PM on September 29, 2008

Sudipta Deb's Answer

estimated lifespan of a notebook PC is totally dependent on the user and how the user is handling the notebook pc.

I can give you one very simple example. I have one notebook pc from 1990 and it is still working fine without any error. where my friend just bough one new notebook pc with really good configuration last year. But now the performance is not upto the mark.

Answered at 10:03 PM on September 29, 2008

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How to partition and format the new hard disk drive? (PC I'm assembling, have no other HDD!)

Asked by Arun Pandian in Computers & Technology at 8:23 PM on September 29, 2008

Sudipta Deb's Answer

To partition and format your hard disk by using the Windows XP Setup program:
1. Insert the Windows XP CD-ROM into your CD-ROM drive or DVD-ROM drive, or insert the first Windows XP Setup disk into the floppy disk drive, and then restart the computer.

Note To start your computer from the Windows XP CD-ROM (or from the startup disk), your computer must be configured to start from the CD-ROM drive, the DVD-ROM drive, or the floppy disk drive. In some cases, you may have to modify your computer's BIOS settings to set this configuration. For information about how to configure your computer to start from the CD-ROM drive, the DVD-ROM drive, or the floppy disk drive, see the documentation that is included with your computer, or contact the computer manufacturer.
2. If you are starting the computer from the Windows XP CD-ROM, select any options that are required to start the computer from the CD-ROM drive if you are prompted to do this.

Note If your hard disk controller requires a third-party original equipment manufacturer (OEM) driver, press F6 to specify the driver.

For more information about how to use F6 to supply a third-party OEM device driver while the Windows Setup program is running, click the following article number to view the article in the Microsoft Knowledge Base:
314859 Limited OEM driver support is available with F6 during Windows XP Setup
If you are starting from the Windows XP Setup disks, insert each of the additional disks when you are prompted, and then press ENTER to continue after you insert each disk.
3. At the Welcome to Setup page, press ENTER.
4.
Note If you are using the Setup disks (6 bootable disks), the setup will prompt you to instert the Windows XP CD.
5. Press F8 to accept the Windows XP Licensing Agreement.
6. If an existing Windows XP installation is detected, you are prompted to repair it. To bypass the repair, press ESC.
7. All the existing partitions and the unpartitioned spaces are listed for each physical hard disk. Use the ARROW keys to select the partition or the unpartitioned space where you want to create a new partition. Press D to delete an existing partition, or press C to create a new partition by using unpartitioned space. If you press D to delete an existing partition, you must then press L (or press ENTER, and then press L if it is the System partition) to confirm that you want to delete the partition. Repeat this step for each of the existing partitions that you want to use for the new partition. When all the partitions are deleted, select the remaining unpartitioned space, and then press C to create the new partition.

Note If you want to create a partition where one or more partitions already exist, you must first delete the existing partition or partitions, and then create the new partition.
8. Type the size in megabytes (MB) that you want to use for the new partition, and then press ENTER, or just press ENTER to create the partition with the maximum size.
9. Repeat Steps 4 and 5 to create additional partitions if you want them.
10. If you want to install Windows XP, use the ARROW keys to select the partition where you want to install Windows XP, and then press ENTER. If you do not want to format the partition and install Windows XP, press F3 two times to quit the Windows Setup program, and then do not follow the remaining steps. In this case, you must use a different utility to format the partition.
11. Select the format option that you want to use for the partition, and then press ENTER. You have the following options:
• Format the partition by using the NTFS file system (Quick)
• Format the partition by using the FAT file system (Quick)
• Format the partition by using the NTFS file system
• Format the partition by using the FAT file system
• Leave the current file system intact (no changes)
The option to leave the current file system intact is not available if

Answered at 10:05 PM on September 29, 2008

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what is http and https?

Asked by santhosh in Computers & Technology at 8:28 PM on September 29, 2008

Sudipta Deb's Answer

Hypertext Transfer Protocol (HTTP) is a communications protocol for the transfer of information on the Internet. Its use for retrieving inter-linked text documents (hypertext) led to the establishment of the World Wide Web.
HTTP development was coordinated by the World Wide Web Consortium and the Internet Engineering Task Force (IETF), culminating in the publication of a series of Request for Comments (RFCs), most notably RFC 2616 (June 1999), which defines HTTP/1.1, the version of HTTP in common use.
HTTP is a request/response standard between a client and a server. A client is the end-user, the server is the web site. The client making a HTTP request - using a web browser, spider, or other end-user tool - is referred to as the user agent. The responding server - which stores or creates resources such as HTML files and images - is called the origin server. In between the user agent and origin server may be several intermediaries, such as proxies, gateways, and tunnels. HTTP is not constrained to using TCP/IP and its supporting layers, although this is its most popular application on the Internet. Indeed HTTP can be "implemented on top of any other protocol on the Internet, or on other networks. HTTP only presumes a reliable transport; any protocol that provides such guarantees can be used."
Typically, an HTTP client initiates a request. It establishes a Transmission Control Protocol (TCP) connection to a particular port on a host (port 80 by default; see List of TCP and UDP port numbers). An HTTP server listening on that port waits for the client to send a request message. Upon receiving the request, the server sends back a status line, such as "HTTP/1.1 200 OK", and a message of its own, the body of which is perhaps the requested file, an error message, or some other information.
The reason that HTTP uses TCP and not UDP is because much data must be sent for a webpage, and TCP provides transmission control, presents the data in order, and provides error correction. See the difference between TCP and UDP.
Resources to be accessed by HTTP are identified using Uniform Resource Identifiers (URIs) (or, more specifically, Uniform Resource Locators (URLs)) using the http: or https URI schemes.

Hypertext Transfer Protocol over Secure Socket Layer or HTTPS is a URI scheme used to indicate a secure HTTP connection. It is syntactically identical to the http:// scheme normally used for accessing resources using HTTP. Using an https: URL indicates that HTTP is to be used, but with a different default TCP port (443) and an additional encryption/authentication layer between the HTTP and TCP. This system was designed by Netscape Communications Corporation to provide authentication and encrypted communication and is widely used on the World Wide Web for security-sensitive communication such as payment transactions and corporate information systems.

source:
http://en.wikipedia.org/wiki /Http
http://en.wikipedia.org /wiki/Http

Answered at 10:00 PM on September 29, 2008

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what is PDF?

Asked by santhosh in Computers & Technology at 8:29 PM on September 29, 2008

Sudipta Deb's Answer

Portable Document Format (PDF) is a file format created by Adobe Systems in 1993 for document exchange. PDF is used for representing two-dimensional documents in a manner independent of the application software, hardware, and operating system.[1]
Each PDF file encapsulates a complete description of a fixed-layout 2-D document (and, with Acrobat 3-D, embedded 3-D documents) that includes the text, fonts, images, and 2-D vector graphics which the documents comprise.
PDF is an open standard that was officially published on July 1, 2008 by the ISO as ISO 32000-1:2008
Source: http://en.wikipedia.org/wiki/P DF

Answered at 9:59 PM on September 29, 2008

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