Practice set: inside the machine

P1. Which part loses its data when power is off?

• Memory (RAM)
• Storage
• A saved photo
• A backed-up file

P2. How many bytes in 5 KB (decimal)?

• 5,000
• 500
• 5,120
• 50

P3. How many 2 MB photos fit in 6 GB (decimal)?

• 3,000
• 300
• 12,000
• 30

P4. The processor repeats which cycle?

• Fetch, decode, execute
• Print, save, close
• Read, write, delete
• Sort, search, stop

P5. LOAD 4, ADD 6, STORE 2 leaves address 2 holding:

• 10
• 4
• 6
• 24

P6. LOAD 20, SUB 5, SUB 3 leaves the accumulator at:

• 12
• 28
• 15
• 22

P7. Four programs with 5 ms turns each get a turn every:

• 20 ms
• 5 ms
• 4 ms
• 9 ms

P8. The operating system is responsible for:

• Sharing the processor and managing memory and files
• Designing the screen
• Writing documents
• Charging the battery