1. What is the second criteria necessary for adding a block to the blockchain?

1. Transaction verification
2. A transaction takes place
3. Transaction storage
4. Adding a hash

1. The type of storage that retains data and information when the power is turned off is called ________.

1. ROM (Read only memory)
2. L3 cache
3. Register
4. RAM (random access memory)

1. The visual image output created by the computer is called ________.

1. Graphics
2. Resolution
3. Color depth
4. Icons