Exam: 036839RR – INHERITANCE AND EXCEPTION HANDLING
When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam.
Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer.
1. A basis for inheritance is the _______ class.
A. center
B. base
C. derived
D. foundation
2. In inheritance, which of the following items is the largest in size?
A. Child
B. Subclass
C. Base
D. Derived
3. Which of the following Exceptions indicates that an array with the wrong number of dimensions is being passed to a method?
A. System.RankException
B. VSystem.FormatException
C. System.IO.IOException
D. System.ArgumentException
4. If you need a public instance method for an Object class that gets a unique code for each object, which code should you use?
A. GetType()
B. Equals()
C. ToString()
D. GetHashCode()
5. Two programmers are discussing derived class objects. Brianne says that you can assign a derived class object to an object of any of its superclass types. Jason says that an implicit conversion from one type to another is an automatic conversion. Who is correct?
A. Neither is correct.
B. Both Brianne and Jason are correct.
C. Only Jason is correct.
D. Only Brianne is correct.
6. Which of the following statements is not a benefit of using inheritance?
A. Inheritance makes the methods and data of subclasses available to the superclass.
B. Inheritance makes programs easier to understand.
C. Inheritance makes writing programs easier.
D. Inheritance makes methods and data available to existing classes.
7. According to C# convention, which of the following examples is a correct exception error message?
A. Negative balance
B. Division by zero
C. The program attempted to divide by zero.
D. The bank balance is negative.
8. Of what is every subclass object an instance?
A. All the ancestors of the subclass
B. The specific subclass only
C. All the subclasses in the superclass
D. Both the subclass and superclass
9. Two programmers are discussing rethrowing an Exception. Jack says that when a method catches an Exception, you can rethrow it to a method that called the method. Ashley says that within a catch block, you can rethrow a caught Exception by using the keyword throw with no object after it. Who is correct?
A. Neither Jack nor Ashley is correct.
B. Only Ashley is correct.
C. Both Jack and Ashley are correct.
D. Only Jack is correct.
10. Two programmers are discussing overriding base class methods. Marsha says that when you override a parent class method in a child class, the methods have the same name. Anna says that when you override a parent class method in a child class, the methods have the same parameter list. Who is correct?
A. Only Marsha is correct.
B. Neither Marsha nor Anna are correct.
C. Both Marsha and Anna are correct.
D. Only Anna is correct.
11. Which of the following statements is not an English-language example of polymorphism?
A. You play soccer differently than you play chess.
B. You run a marathon differently than you would run a track event.
C. You open a book differently than you open your eyes.
D. You exercise your right to vote differently than you exercise to lose weight.
12. If an Exception is thrown without a matching catch block, the program will
A. work as intended.
B. launch a try block.
C. terminate.
D. falter.
13. Exceptions are usually not derived from
A. Exception classes
B. pre-defined Common Language Runtime exceptions derived from SystemException
C. System classes
D. user-defined application exception classes derived from ApplicationException
14. Classes that are prone to errors are said to be _______
A. intransitive.
B. breakable.
C. fragile.
D. transitive.
15. Why are Exception classes typically named with the Exception as the second portion of their name?
A. It allows the compiler to recognize the subclass.
B. It makes Exception descendants easier to identify.
C. It allows the compiler to recognize the superclass.
D. It’s easier to locate in the code.
16. Which of the following phrases is another name for catch block?
A. catch report
B. catch code
C. catch point
D. catch clause
17. Suppose you’re creating a class diagram. Which of the following items would not be included in your code?
A. Objects
B. Methods
C. Data
D. Name
18. What happens when Exceptions are thrown?
A. They must be caught by the method that threw them.
B. They should be caught by the calling program.
C. They must be handled by the method that threw them.
D. They should be caught by the try-catch method.
19. Suppose you’re creating a derived class that inherits an abstract method from a parent. Which keyword should you use?
End of exam
A. abstract
B. override
C. base
D. method
20. Which of the following classes is extended when you create your own Exception class?
A. ApplicationException
B. IComparable
C. Exceptionb
D. SystemException