What is full form of CSS ?
Answer: D
CSS stands for Cascading Style Sheets.
It separates a page's presentation from its structure, so the same HTML can be styled differently for screen, print or a small display. 'Cascading' refers to the rules that resolve conflicting declarations.
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On an excel sheet the active cell in indicated by -
Answer: C
The active cell in Excel is shown by a dark wide border.
It is the cell that will receive what is typed, and its reference appears in the Name Box at the left of the formula bar. The small square at its corner is the fill handle.
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What is full form of SOAP ?
Answer: C
SOAP stands for Simple Object Access Protocol.
It is an XML-based protocol for exchanging structured information between web services, usually over HTTP. Its verbosity is why REST and JSON have largely replaced it.
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http://allexamhub.com - is an example of what?
Answer: A
A URL (Uniform {or Universal} Resource Locator) is an address for a specific document found on the Web. It is made up of several components: a domain name, the directories and subdirectories of the site, and the extension. To learn about these parts of a URL, visit the Evaluating Web Sites tutorial.
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What would you use for immediate, real-time communication with a friend?
Answer: A
Instant messaging gives immediate, real-time communication.
Both parties are connected at once, so a message appears as it is sent. Email, Usenet and mailing lists are store-and-forward: the message waits until the recipient looks for it.
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The letters, "DOS" stand for...
Answer: C
DOS stands for Disk Operating System.
MS-DOS was the operating system of the IBM PC from 1981, working from a command line with no graphics or multitasking. Windows ran on top of it until Windows 95 and finally replaced it with Windows NT.
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What are three types of lasers?
Answer: D
Three types of laser are gas, solid state and diode.
Gas lasers such as helium-neon and carbon dioxide use a gas discharge; solid state lasers use a crystal such as ruby or Nd:YAG; and diode lasers use a semiconductor junction, which is what is in every CD player and laser pointer.
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the active medium used in the first working laser ever constructed was?
Answer: C
The first working laser used a ruby rod.
Theodore Maiman built it at Hughes Research Laboratories in 1960, pumping a synthetic ruby cylinder with a photographic flash lamp to produce a deep red pulse at 694 nm.
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which process is responsible for amplification of the light after the first photons of light are produced ?
Answer: B
Light in a laser is amplified by stimulated emission.
A passing photon triggers an excited atom to emit a second photon identical to it in frequency, phase and direction, so one photon becomes two, two become four, and the beam builds up. The acronym stands for light amplification by stimulated emission of radiation.
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Once the active medium is excited, by which physical process is the first photons of light are produced ?
Answer: B
The first photons in a laser are produced by spontaneous emission.
An excited atom drops to a lower level of its own accord and emits a photon in a random direction. A few of those photons happen to travel along the axis, and they set off the stimulated emission that builds the beam.
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