Case study: The disaster of Ariane 5

1. Briey describe the scenario of events that led to the explosion.

2. What was the problem that caused Ariane 5 to explode?

3. In which system in the rocket did the investigators discover the problem?

4. The concept of Design by Contract is mentioned several times in this case study; explain it.

5. Write a short Java program that illustrates how the concept of pre-conditions/post-conditions

can be implemented.

6. Write some Java code that demonstrate the problem of converting a 64-bit number to a 16-bit

(or 32-bit) number.

7. What was the assumption that the engineers made when they reused some of Ariane 4's software

systems in Arian 5?

8. How the error was handled in the defected system? Why it is not the correct way of handling

errors?

9. What is the programming language that Ariane 5 systems were written in?

10. Name three software qualities that are directly relevant to this case study

please solve 2,3,4,5,6,7,8,9,10