object-oriented programming

Question 1

how are imperative programming and OO programming different?

Answer 1

imperative programming considers data and operations separately; OO programming considers them together

Question 2

imperative programming

Answer 2

considers data and operations separately

Question 3

object oriented programming

Answer 3

considers data and operations together

Question 4

program structuring (constructs)
idea: abstraction through separation

Answer 4

1) procedures/functions
2) modules
3) classes

Question 5

behavior of a construct

Answer 5

what user/client sees or observes; front end

Question 6

implementation of a construct

Answer 6

how it actually does the job; back end

Question 7

behavior vs. implementation

Answer 7

implementation can change but behavior stays the same
example:
behavior: sorting an array
implementation: quicksort, bubblesort, heapsort, …

Question 8

idea of program structuring

Answer 8

• abstraction through separation
• helps information hiding
• design decisions likely to change are hidden so changes do not affect clients