The operation that destroys all data in a queue is called "empty queue".

What is the first thing that a technician should check if a PC randomly reboots during the day?

A) If the riser board is connected B) If the processor is working C) If the power supply fan and CPU fans are turning D) If the computer is plugged securely into the wall socket

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

1. One criteria for an S-box is: "If two inputs to an S-box differ in exactly one bit, the outputs must also differ in exactly one bit. “? 2. The heart of a Feistel block cipher is the function F, which relies on the use of S-boxes. ? 3. The strict avalanche criterion and the bit independence criterion appear to weaken the effectiveness of the confusion function. ? 4. An advantage of key-dependent S-boxes is that because they are not fixed, it is impossible to analyze the S-boxes ahead of time to look for weaknesses. ? 5. The key schedule algorithm is more popular and has received more attention than S-box design. ?