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Computer Interview Questions Answers

Computer Interview Questions Answers

Question - 11 : - What is deployment descriptor ?

Answer - 11 : - An XML file provided with each module and J2EE application that describes how they should be deployed. The deployment descriptor directs a deployment tool to deploy a module or application with specific container options and describes specific configuration requirements that a deployer must resolve.

Question - 12 : - Are spaces allowed in e-mails?

Answer - 12 : - Just like a InternetURL no spaces are allowed in an e-mail address. However, names can be broken up using a period; for example, krishan sharma may have an e-mail address: krishan.sharma@exammaterial.com or krishan.s@exammaterial.com because no spaces are allowed in the e-mail address.

Question - 13 : - What are some examples of computer peripheral devices ?

Answer - 13 : - A computer peripheral, or peripheral device, is an external object that provides input and output for the computer. Some common input devices include: keyboard mouse joystick pen tablet MIDI keyboard scanner digital camera video camera microphone Some common output devices include: monitor projector TV screen printer plotter speakers There are also devices that function as both input and output devices, such as: external hard drives media card readers digital camcorders digital mixers MIDI equipment While these are some of the more common peripherals, there are many other kinds as well. Just remember that any external device that provides input to the computer or receives output from the computer is considered a peripheral.

Question - 14 : - What is the difference between bits and bytes?

Answer - 14 : - Bits and Bytes both measure amounts of data. However, they are typically used in two different contexts. Bits, kilobits (Kbps), and megabits (Mbps) are most often used to measure data transfer speeds. This may refer to how fast you are downloading a file, or how fast your Internet connection is. For example, if you are downloading a file on cable modem, your download speed might be 240Kbps. This is much faster than a dial-up modem, which maxes out at 56Kbps. Bytes, on the other hand, are used to measure data storage. For example, a CD holds 700MB (megabytes) of data and a hard drive may hold 250GB (gigabytes). The other important difference is that bytes contain eight bits of data. Therefore, a 240Kbps download is only transferring 30KB of data per second. However, kilobytes per second is not as commonly used as kilobits per second for measuring data transfer speeds. After all, using kilobits per second (Kbps) makes your connection sound eight times faster! It is important to know that bytes are abbreviated with a capital B, where as bits use a lowercase b. Therefore, Mbps is megabits per second, and MBps is megabytes per second. So 8Mbps is equal to 1MBps.

Question - 15 : - What is create method ?

Answer - 15 : - A method defined in the Interview Questions - Home interface and invoked by a client to create an enterprise bean.

Question - 16 : - When and who invented the first computer mouse?

Answer - 16 : - The computer mouse as we know it today was invented and developed by Douglas Englebart during the 60's and was patented on November 17, 1970. While creating the mouse Douglas was working at the Stanford Research Institute, a think tank sponsored by Stanford University and originally referred to the mouse as a "X-Y Position Indicator for a Display System." This mouse was first used with the Xerox Alto computer system in 1973. However, because of its lack of success the first widely used mouse is credited to being the mouse found on the Apple Lisa computer. Today, the mouse is now found and used on every computer.

Question - 17 : - How does XML handle white-space in my documents?

Answer - 17 : - All white-space, including linebreaks, TAB characters, and normal spaces, even between ‘structural’ elements where no text can ever appear, is passed by the parser unchanged to the application (browser, formatter, viewer, converter, etc), identifying the context in which the white-space was found (element content, data content, or mixed content, if this information is available to the parser, eg from a DTD or Schema). This means it is the application's responsibility to decide what to do with such space, not the parser's: * insignificant white-space between structural elements (space which occurs where only element content is allowed, ie between other elements, where text data never occurs) will get passed to the application (in SGML this white-space gets suppressed, which is why you can put all that extra space in HTML documents and not worry about it) * significant white-space (space which occurs within elements which can contain text and markup mixed together, usually mixed content or PCDATA) will still get passed to the application exactly as under SGML. It is the application's responsibility to handle it correctly. The parser must inform the application that white-space has occurred in element content, if it can detect it. (Users of SGML will recognize that this information is not in the ESIS, but it is in the Grove.) <chapter> <title> My title for Chapter 1. </title> <para> text </para> </chapter> In the example above, the application will receive all the pretty-printing linebreaks, TABs, and spaces between the elements as well as those embedded in the chapter title. It is the function of the application, not the parser, to decide which type of white-space to discard and which to retain. Many XML applications have configurable options to allow programmers or users to control how such white-space is handled.

Question - 18 : - What is declarative security ?  

Answer - 18 : - Mechanisms used in an application that are expressed in a declarative syntax in a deployment descriptor.  

Question - 19 : - What is the difference between Hibernate and Standby in Windows XP?

Answer - 19 : - Hibernate and Standby are two different sleep options that Windows XP offers. Hibernate saves an image of your desktop, including all open windows and files. Then it powers down your computer just as if you had turned it off. When you turn your computer on again, your windows and files are open just as you left them. Standby is a more traditional sleep mode, as it reduces the power your computer uses to almost nothing. When you select Standby, the power to your screen, hard drive, and peripheral devices is cut. However, the power to the computer's memory (RAM) is maintained so your open files stay open.

Question - 20 : -  What is another name for a motherboard? .  

Answer - 20 : -  A system board is another name for a computer motherboard.  

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