Which HTML5 tag defines marked text? (can be used to highlight parts of text)

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Which CSS pseudo-class adds a style to an element when the mouse is over it?

:focus :hover :active

a:hover {
  font-weight: bold;
  color: #00da01;
}

Click on the function which returns a string value that represents the number rounded to the x digits after the decimal point.

toPrecision(x) toFixed(x) floor(x)

var num = 12.34567;
num = num.toFixed(2);
alert(num);       // 12.35

Indicate the PHP function which reads an entire file into an array.

[) file() readfile()

$arr = file("a_file.txt", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
var_export($arr);

Javascript/ajax/javascript Course