A:AnswerMinecraft should be ok. But black ops 3 may not fluent with high graph quality. You can check the hardware requirement of the game.
BTW, If you want to play games, choose a laptop with discrete graph card.
A:AnswerI just purchased one today and it was on sale for $279 and included 6 months of internet security. The $349 is only if you want to get it with the Microsoft Office.
A:AnswerIt has two slots:
Memory Speed 2133 MHz
Configuration Features 1 x 4 GB + 1 x 2 GB
Technology DDR4 SDRAM
You can buy two 8GB, and make it total 16GB.
A:AnswerYes, it has a 1 year manufacturer's warranty (both the warranty and a paid protection plan would begin at the time of sale- they do not stack).