What does a triangular arrow shape with a solid line mean in UML? (The triangle is an outline, and not solid)A Aggregation B Association C Composite Aggregation / Composition D Dependency E Inheritance/Generalization
Answer: E
You are studying a class diagram of an exiting system so that the new functionality you are adding uses the existing class attributes wherever possible. What do the following symbols mean in UML with regards to visibility?A # public, + protected, - private B + public, - protected, # private C + public, # protected, - private D # public, - protected, + private
Answer: C
Which of the following are true about Vertical Scalability?A (Achieved by adding servers to the system B Achieved by adding capacity (memory, CPU and so on) C It is generally more expensive than Horizontal scaling D Decreases manageability E Requires few or no changes to the system architecture F Not supported by J2EE G Has little or no impact on the reliability and availability of the system
Choices B, E and G are correct.
Your company has a custom operating system that it developed for some robotics hardware to be used in their research departments. One of the researchers has written a cut down Virtual Machine to run on this OS. You have started to develop some software to run on this VM however you need to convert the Unicode to 8 bit characters. In order to do this you will need to use:A FileWriter B OutputStreamWriter C BufferedWriter D StreamWriter
Answer: B
You need to convert 8bit text to Unicode. To do this you use:A FileReader B InputStreamReader C BufferedReader D StreamReader
Answer: B
What is the difference between composite aggregation and normal aggregation?A Aggregation defines a part of relationship but both objects can exist independently. But with composite aggregation if one part is removed then the other part will be removed. Think of a plane the wings have a composite aggregation relationship with the body of the plane. B Composite Aggregation defines a part of relationship but both objects can exist independently. But with aggregation if one part is removed
Answer: A
What should be used if you don’t need an instant response from a message?A Synchronous messaging B Asynchronous messaging
Answer: B
You overheard two colleagues arguing about the difference between Localization and Internationalization. They turn to you to ask you to settle the argument. What is the difference between Localization and Internationalization?A Internationalization is the process of preparing a program to be used in a country other than England. B Internationalization is the process of preparing a program to be used in any country. C Localization is the process of preparing a program to be used in a country
Answer: B
You have an existing mail order application that runs as an applet on the customer’s browser. The applet connects to your server to retrieve product information. (Note all data is sent securely over SSL) What would you expect to change to meet the needs of users in different countries?A GUI text, e.g. Message box text etc. B Security login procedures C Dates D Numbers, e.g. Currency E The way the program writes to binary files. F Icons, Images G The way the program writes to text
Choices A, C, D, F and G are correct.
You’ve had enough of you existing IDE (Integrated Development Environment) and have started work on designing your own. At the moment you’re working on the undo part of the application, basically you need to be able to roll an object back so its previous state. What pattern would you use to do this?A Memento B State C Mediator D Rollback E Transaction F ACID
Answer: A
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