I have hard the name of cache memory but i do not know the function of this memory.

When and in which computer using this memory.

How can I categorize the Exchange server, is it part of Microsoft servers? Is it popular and if so in which ways?

Please explain so that anyone can understand including someone who has not dealt with servers before like myself.

How can I take a screenshot of an image using my Apple iPod Touch? Is it simultaneously pressing the home button and the power button?

How come we cannot play Facebook games (via Facebook app) on an iPad? I cannot play my Web City in Cityville when I access my Facebook account.

How does message queue work to ensure delivery of messages just at the right time without delays? How is this technology relevant to the development of information and communication in the current world.

My pendrive is infected by virus. I cannot format, cannot copy anything. When I try to format or copy, it says, format cannot be possible for write protected disc. Now, I don't understand, how to remove write protection from my pendrive?

What is meant by Fresnel distance in optics IE diffraction how is it related to the validity of ray optics please do make it simple as I am a beginner?

I am very worried with my PC and now there are so many pop ups appearing when I am connected to internet and even though I'm not clicking it, it appears always.

How can I stop it and what will happen to my PC?

Want to know about iPhone features.  Why do I get a message asking for location data?

Thank you

What is the difference in career scope for a computer science engineer vs an information technology engineer?