What is Bitcoin ?
A.It Is crypto-currency [ E-currency ] it can be used to make payments online. Bitcoin payments are easier to make than debit or credit card purchases and It can easily replace them. Bitcoin is a peer-to-peer payment system and digital currency introduced in 2009 by Satoshi Nakamoto
What are the advantages of Bitcoin?
A.*.Transparent and neutral*.
Instant Payment*.
Very low fees*.
Secure, Irreversible*.
Strong protection against identity theftI'll be explaining all these points in upcoming posts
What are the disadvantages of Bitcoin?
A.*.Not Yet fully known by average joe*
.Volatility*.
Uncertainty*
.Money Laundering
What is Bitcoin mining ?
A.The process of finding new blocks to be added to blockchain is called Bitcoin mining. This is done by a computer program by solving a complex puzzle with real time input of transaction data. Now a days mining requiresspecialized hardwares and electricity consumption. Miners are rewarded with Bitcoin by the system.
What are the units of Bitcoin ?
A.There are 4 standard units of Bitcoin...i.
1 BTC = 1 Bitcoinii.
1 mBTC = 10^(-3) Bitcoiniii.
1 μBTC = 10^(-6) Bitcoiniv.
1 Satoshi = 10^(-8) Bitcoin
From startup to surfing to gaming, here are five ways you can clean up an old PC to make it look youngagain.1. Speed Up Your StartupIf an entire pot of coffee can brew in the time it takes for your computer to boot, it’s time to make some changes. Most likely your computer is not slow – it’s the dozens of programs turning onduring startup that are slowing it down.Download a comprehensive tool likeAutorunsto easily disable certain programs during your startup. Or try Windows’ slightly less thorough, built-in utility,MSConfig. To find it, go to Search or Run under Start and type “msconfig.” Under the “Startup” tab, uncheck the boxes of the programs you don’t need to run every time your computer is turned on, for instance, iTunes or your printer. If you don’t recognizea program, leave it be. Restart yourcomputer and watch it fly.2. Clear It OutIf painfully slow surfing is your main problem, there are a couple quick changes you can make.Are you an Internet Explorer user? Get rid of it. Google Chrome is the best browser on the market now, known for speedy surfing. Under Chrome, go to Clear Browsing Dataand check the boxes of temporary Internet files like cookies, cache, download history and browsing history.To take further precaution, try a program likeCCleanerfrom Piriform. The free software program removes temporary files from all of your browsers, as well as Windows and the registry, to make your PC run faster.3. Slim DownThis involves more than just uninstalling programs you don’t use anymore. If you’re not totally committed to the usual suspects, like Windows Media Player and Microsoft Office, switch to something that requires less computing power. Free applications can easily replace go-to programs, while speeding up your PC and giving you additional features at the same time.VLC Media Playeris a lightweight, open source media player that ripsDVDs, streams video and recognizes any unprotected mediaformat.FoxIt Reader, an alternative to Adobe Reader, does more than just open PDFs all whileusing less RAM. Edit documents, open multiple PDFs in tabs and more.AbiWord, a free and open source word processor, and Apache’sOpen Office, a free and open source full-fledge suite, can easily fill the void of Microsoft Office.4. Automate Your UpdatesUpdates are annoying. It’s easy to click “remind me later” and avoid the notifications, until you’re so frustrated with your computer thatyou finally set aside an entire afternoon to update everything.Let’s solve this. Go toMy Computer > Properties > Automatic Updates. Make sure this is set to Download and Install Automatically. To completely cover your bases, find out if any programs need to be updated manually by downloadingUpdate Checkerfrom FileHippo.com. The fast and free program scans your computer and reports back with any available updates in seconds.5. Make Some UpgradesIf you’re into gaming, a $150 investment in a graphics card might be worth your while. Forewarning: You’ll have to toy with your motherboard to make this upgrade happen, but there area lot of online tutorials you can follow.Finally, the most effective way to speed up your PC – which also requires tinkering – is to add moreRAM (random access memory). You can find 4GB of memory for under $50 online. If you have less than 2GB (go toMy Computer > Propertiesto find out), an upgrade should be in your future.
Apple has demonstrated repeatedly that it does not want owners of its hardware attemptingto fix it themselves. That’s their right, but the 12-inch 2015 MacBook has taken that unrepairablity outside of Apple’s own tech department to a new level.iFixit has carried out its usualteardownof the newestMacBookon the market, and the verdict is basically: don’t even bother trying to repair this laptop yourself. It scored 1 out of 10 on their scale, and is a case filled with proprietary screws and a lot of adhesive.We’ve already seen how theMacBook is mostly batteriesinside the case, but the terraced battery system isn’t just placed snugly, it is firmly glued to the lower casing. The central battery is even placed in a well and glued in place making it very difficult to remove if necessary. The result is batteries that have to be forced out and are left covered in glue.Then we have the new butterfly mechanism keyboard. It has a backing secured with adhesive that once removed reveals two proprietary pentalobe screws per key. That’s 83 screws total just in the keyboard. iFixit also has someconcerns about that butterfly mechanism as it is very thin and uses a plastic hinge. How well willthat hold up over time?Apple has been criticized for only including a single USB port to handle both power and peripheral connections. It is going to get a lot of use and abuse, but that doesn’t mean it’s easy to replace if damaged. Apple has secured it underneath the display bracket, meaning a lot of disassembly will be required if it breaks.Then finally, and as expected, the logic board has everything soldered on to it, so no RAM or flash memory upgrades, and if something goes wrong you’ll needa new board.
Samsung, in its infinite wisdom, has decided to remove the microSD card slot from its new flagship smartphone. The Galaxy S6 comes in 32GB, 64GB, and 128GB versions, and you must choose carefully because that’s all you get. Well, sort of. There areways to add more storage to your phone that aren’t quite as convenient as dropping in a microSD card, but sometimes using the cloud simply isn’t an option. Here are some of the best options you have.Leef Bridge 3.0Leef’s main focus is on making flash drives that work with smartphones and tablets, so it should come as no surprise its offering is one of the best. TheLeef Bridge 3.0has a regular USB 3.0 port on one end and a microUSB on the other. Simply plug it into your computer to load all the files you want to have access to in your phone. When the time comes to make use of it, just slide the microUSB plug out and plug into your phone.When the Leef is plugged in, the Galaxy S6 will detect that storage has been added and will open the built-in file manager. From here you can open any compatible file and add more files to the drive from your phone. Data throughputis good enough to watch HD videowithout buffering.The Leef has very good build quality and the sliding mechanismclicks solidly into place. That makes it easy to get it slotted into the Galaxy S6’s somewhat finicky USB connector. You will have a flash drive awkwardly sticking out of your phone, though. It comes in16GB, 32GB, and 64GB capacities priced from $30 to $70.SanDisk Wireless Flash DriveSanDisk has an option to add a lotmore storage to your phone without having a drive sticking outof the bottom. TheWireless Flash Drivecreates its own WiFi access point that you can tether to and stream content to your phone. It has a rechargeable battery that’s good for four hours of continuous video streaming or more if you’re only using it intermittently.There’s a regular USB port on the end which is used for charging and data transfer. Just load it up, then long-press the power button to activate the access point. You’llneed the SanDisk Wireless Flash Drive app to connect, and it can be a little wonky. You also won’t have internet access while connected to the drive unless you set up connection forwarding in the app, but again, it’s a little picky.One particularly cool thing about this drive is that all the storage is in the form of a microSD card in a slot at the end of the stick. You can pop it out and put in a larger one if you want. This device comes pre-loaded with 16, 32, and 64GB cards priced from $35 to $90.
Smartphones are an extremely useful tool to have in your pocket, not only for communication and entertainment, but also for learning, fact checking, and quickly finding answers to questions. And that’s why we don’t let kids take them into exams, or in this case,chessplayers use them during tournaments.Gaioz Nigalidze is the reigning Georgian national chess champion and a chess grandmaster. However, he has been accused of cheating and could now serve a three-year ban depending on the outcome of the claim.The cheating claim was made by his opponent, Tigran Petrosian, during the sixth round of the Dubai Open. Nigalidze had been making very frequent and long trips to the toilet after playing his moves, which made Petrosian suspicious and led to asearch of the bathroom. A smartphone was discovered hidden in some toilet paper in a bin with a chess program loaded on to it. We don’t know which chess app he was using (yet).This could have been someone else’s smartphone, but Nigalidze’sFacebook account was logged in on the handset. He has denied cheating, but the evidence suggests otherwise. It also looks like a very silly thing to risk your chess playing career over considering first prize is only worth $12,000.Gaioz Nigalidze is 26-years-old, ranked 400th in the world, and regarded as a very talented player.Using a chess program on his phone would have allowed him to experiment and look ahead several moves. Being a professional player he would easily be able to memorize those moves before returning to the game with an unfair advantage over his opponent.
