The field used to link a child table to a parent table is known as the ____ in the child table.
A. record
B. foreign key
C. cell
D. primary key
Answer: B
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Answer the following statements true (T) or false (F)
1. In the days before PCs and the Internet, Intel’s mainframes dominated the information technology marketplace. 2. An IBM mainframe’s instruction counter is called the PCW. 3. Bits 8-11 of an IBM mainframe’s PSW hold the instruction address. 4. Bits 14 and 15 of an IBM mainframe’s PSW indicate the task’s state. 5. The last 31 bits of an IBM mainframe’s PSW hold the instruction address, the address of the next instruction to be executed.
A secure _________________________ is a physical location that has controls in place to minimize the risk of attacks from physical threats.
Fill in the blank(s) with the appropriate word(s).
The power supply coverts the wall outlet DC power into AC power.
Answer the following statement true (T) or false (F)
Which industrial control system (ICS) device knows enough to manage a process?
A. Actuator B. Sensor C. Controller D. Interface