Practice set: abstraction, functions and structures

P1. Abstraction means:

• Hiding how and showing what
• Adding more detail
• Copying code
• Sorting

P2. average(2, 10) = (a + b) ÷ 2 equals:

• 6
• 12
• 5
• 2

P3. A function with the same inputs should give:

• The same output
• A random output
• No output
• An error

P4. In the list 9, 6, 3, 1, the item at position 1 is:

• 6
• 9
• 3
• 1

P5. The last position in a list of 5 items is:

• 4
• 5
• 6
• 1

P6. To find a value by name use:

• A dictionary
• A list read by position
• A loop with no data
• A comment

P7. Prices 30 and 20 with invented tax of 10 percent give a grand total of:

• 55
• 50
• 53
• 60

P8. You should test each function:

• Alone, before the whole
• Only after release
• Never
• Only the first one