This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Sherif, please state the source of where you got this question from. Otherwise you may find this thread removed.
Also, please give your logic for why you think certain parts are correct or why you disagree with the answers that the test source provided. You will learn more that way and it will increase the likelihood of someone responding specifically to your doubt.