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Final Exam CSE 2221/21 Complete Q’s and A’s
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Final Exam CSE 2221/21 Complete Q’s and A’s
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Final Exam CSE 2221/21 Complete Q’sand A’s
In design-by-contract, the code responsible for making sure the precondition
(requires clause) is true when a method is called is:
a. code that implements method
b. code that compiled method
c. code that calls method
d.code that designed method
e. code that signed the contract - - c
- The Java Virtual Machine (JVM) is responsible for:
a. improving the performance of a java program (compared to running
directly on the hardware/OS)
b. storing java programs for execution at a later time
c. executing the java bytecode found in a .class file
d. compiling the java source code in a .java file into bytecode
e. copying java programs from one user to another - - c
- Under design-by-contract which of the following statements is true?
a. implementer may assume that the postcondion(ensures clause) is true
when writing the method
b. the implementer may assume that the precondition(requires clause) is
true when writing the method
c. the implementer must make sure that the precondition (requires clause) is
true when the method returns
d. the implementer must write the method so it throws an exception if the
client does not satisfy the precondition(requires clause) - - b
- model - - Responsible for handling program state changes.
- view - - Responsible for the part of the program visible to the user.
- controller - - Executes callback upon user interaction
- observer - - Keep track of information in the program.
- subject - - Provides callback that is used in user interactions.
- event - - A user interacts with the program.
- Jframe - - main window
- DemoGUI - - body of actionPerformed method
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