Podcast
Questions and Answers
What can replace longest in the method countTarget so that the method works as intended?
What can replace longest in the method countTarget so that the method works as intended?
String longest = words;
Is there any precondition necessary for the method findAvg to work as intended?
Is there any precondition necessary for the method findAvg to work as intended?
True
What statement can be used to replace the empty statement in the reverse method?
What statement can be used to replace the empty statement in the reverse method?
newArr[k] = arr[arr.length - k - 1];
What can replace the empty statement in the twoInARow method so that the method works as intended?
What can replace the empty statement in the twoInARow method so that the method works as intended?
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Why doesn't the provided code segment produce the intended output regarding memory?
Why doesn't the provided code segment produce the intended output regarding memory?
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Why does the code segment not produce the intended output AB?
Why does the code segment not produce the intended output AB?
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Why does the code segment involving Bike and EBike not compile?
Why does the code segment involving Bike and EBike not compile?
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Study Notes
Method Functionality and Corrections
-
countTarget Method: Intended to return the frequency of
targetinarr. Requires correction in implementation. - findAvg Method: Calculates arithmetic mean of an integer array; no preconditions necessary for execution.
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reverse Method: Designed to return a reversed array from the input
arr. Correct logic to reverse must be implemented.
Code Output Comparisons
- Array Printing Code: The code snippet using enhanced for-loop prints values directly. An alternative using index-based access must ensure the correct array element is accessed.
- Output Consistency: Only specified code segment III reproduces the original output of printing array elements.
Logic Implementation in Conditional Checks
- twoInARow Method: A proper iteration is required to detect consecutive equal elements in an array, necessitating adjustment in the loop index range.
Class and Inheritance Issues
- Computer and Smartphone Classes: Compilation error arises from trying to access subclass-specific methods from a superclass reference.
- Method Overriding: In subclass C2 of class C1, overriding m2 leads to different output than expected when called through superclass reference.
Object Creation and Method Access
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Bike and EBike Classes: Attempt to print
getNumOfWatts()on a Bike reference results in a compilation error, as the method does not exist in the superclass.
General Principles
- Methods must align correctly with expected outputs and constructors.
- Understanding superclass versus subclass method access is crucial for avoiding compilation errors and achieving intended functionalities.
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Description
Test your understanding of concepts covered in AP Classroom sections 6.1, 6.2, 6.3, 6.4, and 9.6. This quiz includes example questions and flashcards to help reinforce key programming methods and logic. Improve your coding skills and prepare for your exams with these targeted questions.
