TestOut LabSim A+ Certification Practice Exam

Which interface can be used to connect a keyboard and a mouse?

1. USB

2. PS/2

3. HDMI

4. SATA

The correct answer is: PS/2

The correct choice is the PS/2 interface. Historically, the PS/2 port was specifically designed for connecting keyboards and mice to a computer. It is a round connector typically found on older computers, with separate ports for each device—one for the keyboard (usually purple) and another for the mouse (usually green). While USB has become the standard interface for connecting a wide variety of peripherals, including keyboards and mice, the question specifically asks about an interface that can be used traditionally for this purpose, pointing to PS/2 as a classic connection type for these devices. The HDMI interface is primarily used for transmitting high-definition video and audio signals to displays, and it does not support input devices like keyboards or mice. Similarly, the SATA interface is designed exclusively for connecting storage devices, such as hard drives and SSDs, not peripheral input devices. Thus, focusing on the traditional use of interfaces, PS/2 stands out as the correct choice for connecting keyboards and mice.