Composition is sometimes referred to as a(n) ________.

The header of an instance method cannot include the word ____.

A. void B. public C. private D. static

Answer the following statements true (T) or false (F)

1. A channel is directly controlled by the mainframe’s main processor. 2. A channel and the computer’s main processor are synchronized by the processor’s internal clock. 3. When channels are used, each physical device has its own control unit. 4. Because a channel and the computer are independent, the main processor has no way of knowing when an I/O operation is completed unless the channel tells it. 5. The channel notifies the main processor that an I/O operation is complete by sending the main processor an electronic signal called an interrupt.