Which tool is used to test electrical current within a source of power, like a power supply?
cable tester
cable striper
crimper
multimeter

Multimeter

Explanation:

A multimeter or multitester or VOM (volt-ohm-milliammeter), is a tool to measure electricity and this tool has some function to measure voltage, current, and resistance. We could find analog and digital multimeters, and we can find expensive certificates and professionals multimeters ($5,000) or cheap ($10).

the today function returns a valid value without any arguments.

the today function returns the current date based on the computer's date setting and formatted as a date. today takes no parameters, but requires that you use empty parentheses

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt