Not sanitizing input before passing it into a database query.
A 'Signature' appears at the bottom of your e-mail messages and contains standard information about yourself that the recipient can use to contact you in a variety of ways
True, if you plan on running a lot of applications at the same time, you should get more RAM for your computer. 8+ GB of DDR4 ram should be good for every day applications. 16GB should be more than enough for everything for the next couple years.
I guess your question is: is this a true statement?
and the answer is: no, this is not a true statement, it's false.
Opportunity cost is the most desirable alternative. For example if you can earn 100, 50 and 30 dollars, and you choose 100, then your opportunity cost is the 50 dollars you rejected
