1_JAVA_IS_YOU (★)

2_WHERE_DO_I_GO (★)

3_NOW_WHAT_IS_THIS (★)

4_OUT_OF_REACH (★★)

5_SUMMER_IN_THAILAND (★)

6_ENCAPSULATED (★★★★)

7_CROSSING_RIVER (★★)

8_INHERITANCE (★★)

9_LOGIC_GATE (★★)

10_FETCH_DECODE_EXECUTE (★★)

11_SHIFT_REGISTER (★★★)

12_STATIC_HAZARD (★)

13_PROPAGATION_DELAY (★)

14_SPEED_UP (★)

15_TUNNEL_SPAGHETTI (★★★)

16_CONDITIONALS (★★)

17_LOOP (★★)

18_NESTED_LOOP (★★★)

19_DONT_TOUCH_IF_IT_WORKS (★★★★)

20_TRAVELLING_SALESMAN (★★★★★)