Which one of the four keywords in SQL is used to determine how rows will be sorted?
A. SELECT
B. WHERE
C. ORDER BY
D. SORT
Answer: C
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Describe where the observer pattern is used in the analysis model (participating classes, roles). Answer the same question for the source code (object model).
Observer pattern – Implementation We will show the Observer pattern implementation Exercise – Programming Assignment: Adapter pattern 1) Adapter pattern – Modeling A new instrument (AnalogSpeedometer) from a legacy system has to be integrated into Asteroids (see Figure 1). The existing class AnalogSpeedometer must not be changed. Therefore an Adapter pattern should be used. Integrate the AnalogSpeedometer into the existing model. Figure 1: Asteroids classes, AnalogSpeedometer Task 1) Mapping the analysis objects to code The analysis objects in Figure 1 are implemented in the source code. For every class in the analysis model specify its implementing class and its package in the source code (and therefore in the object model). Hint: There is not necessarily a one to one mapping. Task 2) Identification of the observer pattern Describe where the observer pattern is used in the analysis model (participating classes, roles). Answer the same question for the source code (object model). Task 3) Extension of the model Extend the analysis model by a new class Compass that shows the direction of the space shuttle. Task 4) Observer pattern – Implementation (programming assignment) Implement the Compass according to your analysis. Task 5) Bonus: Adapter pattern Assume there the following new requirement has been formulated for the Asteroids game:
Which of the following statements are true?
A. Throwing an exception that is not declared in the throw list will causes function unexpected to be invoked. B. A function should warn the programmers that any exceptions it might throw, so the programmers can write robust program to deal with these potential exceptions in a try-catch block. C. If a function is declared as returnType functionName(parameterList) throw (type), this function can only throw the exception of the specified type. D. Placing throw() after a function header, known as an empty exception specification, declares that the function does not throw any exceptions. E. A function without exception specification can throw any exception and will not cause unexpected to be invoked.
Which of the following is not an example of something you know authentication?
A. Cognitive password B. PIN C. One-time passcode D. Password
Which of the following statements about implicit type conversion is true?
A. Characters cannot be used in arithmetic expressions so they cannot be promoted. B. To evaluate a long long integer and a double, the double is first demoted to a long long integer. C. If the right expression in an assignment has a higher-ranked type than the variable on the left of the assignment operator, the right expression is promoted to the variables type. D. In an assignment, the expression on the right of the assignment operator may be promoted or demoted to match the type of the variable on the left. E. Integer values cannot be promoted to real and real values cannot be demoted to integer.