What is Hadoop? Are Hadoop and java similar? Is it open source? How do I set up Hadoop? Which operating system is needed to set up Hadoop? Is there any risk to use Hadoop? Can I connect any database to Hadoop? Can Hadoop need JRE? What is HDFS? Please say something about Hadoop on Amazon EC2/S3 services.

Give suggestions following questions

Can I upgrade to OS X Yosemite to my Mac Pro (Early 2008 or newer)?

Is it free to upgrade? What are the general requirements needed? Can make HD video call make and what upstream, downstream rates are needed? What are Boot Camp installations required? What is additional hard drive required?

Thank You

Hello. I can’t connect browser to the internet but I’m connected to my dongle. My pc shows the internet connectivity and I can ping yahoo.com. I've tried to enter the command (netsh int ip reset resetlog.txt) and I reboot my pc and deactivate antivirus (quick hill) but still I can’t access internet. How to recover? Please help. Thank you

Hi!What Processors, Graphics, Storage are needed to use Minecraft: Pocket Edition? Is there split touch controls? Is it supported on Sony Ericsson Xperia Mini Pro, iPad (1st, 2nd, 3rd, and 4th Generation, Air, Air 2), iPhone (3GS, 4, 4S, 5, 5C, 5S, 6, 6 Plus)? How do it size in iOS,Android,Windows, Phone?Thank You

Hi! I am using Plantronics GameCom 777 but unfortunately it’s   stopped. After that I switched USB port and restarted the computer, But results are same, the microphone was not working anymore but it’s working another computer. When I am try to other device to same port working. Please give me your valuable suggestions to recover.

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I have heard many people talking about NTSC and PAL and region locks and whatsoever. What actually means NTSC? What about PAL? And what is region lock? I have also heard that NTSC hardware don't execute PAL software and many things like this. What is the reason behind NTSC and PAL which don't support each others' contents?

Does anybody know what is Apache Cordova?

Which latest version is released of Apache Cordova?

I have some question about Samsung Galaxy S6. i.e.

Has the Galaxy S6 a non-removable rear and wireless charging system?

I have ordered a Payoneer Prepaid MasterCard for myself and I'm really impressed with its features. You can withdraw your money from any part of the world or pay with the card in stores which accept MasterCard as a form of payment. However, how does the Payoneer MasterCard work worldwide without any issues?

what is the perfect software we can use to removedate and time created in the photos as recorded in the video ?