The area of a square is stored in a double variable named area. Write an expression whose value is length of the diagonal of the
square. Instructor Notes: When it says expression, recall that's just the function call(and stuff here), and not something like myVar = function call(and stuff here)
When the function is called, it will give the square root of the value stored in variable area.
As we have to find the length of the diagonal, we must knew that as all sides of the square are same in length so are the diagonals. This means that each of the four sides of the square and it diagonals are equal in length.
The NFC Technology is a Wireless Technology which works in the range of 10 cm or less.
NFC stands for Near Field Communications.
The name itself indicates that it a communication mode with the near by objects.
The NFC technology is used in Access Cards, Payment Cards and Mobile Devices etc.
Option (a) IM - Instant Messaging is the instant text messaging technology sends and receives messages over the internet. It is used in Social Media where instant messaging is available. So, option (a) is not correct option.
Option (b) text messaging the technology is the technology in which the text messages are sent over the mobile networks ( in case of text messaging in mobile phones ) or over the internet ( emails, blogging etc). So, option (b) is not correct option.
Option (d) DES is not a short range wireless technology. So, option (d) is not correct.
