Clock speed is expressed in which unit of measurement?

Clock speed refers to the frequency at which a computer's processor operates, indicating how many cycles it can perform per second. The units of measurement used for clock speed typically include Hertz (Hz) and its multiples, which are increasingly used as technology advances.

The most common units for clock speed are:

• Gigahertz (GHz), which represents billions of cycles per second.

• Megahertz (MHz), which stands for millions of cycles per second.

• Kilohertz (KHz), indicating thousands of cycles per second.

• Hertz (Hz) is the base unit measuring one cycle per second.

The choice of Megahertz as the correct answer points to a historical context where processors, particularly in earlier computing technology, typically operated within the range measured in MHz. While modern processors often operate in GHz, with values exceeding several gigahertz, MHz remains a valid unit for measuring clock speed, particularly for older systems or specific components.

Thus, while all provided options are correct representations of clock speed in different contexts, focusing on Megahertz highlights a specific measurement that remains relevant in certain discussions around processor speeds and computing history.