Question

which of the following tools is specifically designed to test the dc voltage on a hard - disk drive power connector?
power - supply tester
cable tester
loopback plug
toner probe

Explanation:

A power - supply tester is specifically designed to test DC voltages on a hard - drive power connector. A cable tester checks for cable integrity, a loopback plug is used for network or serial port testing for signal loopback, and a toner probe is used to trace cables.

Answer:

Power - supply tester