Using Objects in AP Computer Science A
What do you necessarily need to provide when calling any non-default constructor or non-void methods/parameters in your program?
Nothing, a blank parenthesis is sufficient.
Default values allow omission provided.
Exact number of type each parameter required.
Just variable names associated with those types.
If we call printSum(5,10); assuming it's properly defined elsewhere in our program, what would be expected to happen next?
It waits for additional inputs before executing.
It prints "5+10" as text on screen without calculation.
The printSum method executes using arguments 5 and 10.
It returns some numerical result back to where it was called from.
If you must choose between two void methods with parameters that manipulate data structures—one employing tail recursion and another utilizing head recursion—which should generally be prioritized for efficiency reasons?
The tail-recursive method since some compilers can optimize tail calls into iterations avoiding additional stack frames.
Neither—both types of recurrences have identical efficiencies across all scenarios.
The head-recursive method because recursive calls are placed first enabling quicker access to subsequent operations.
In what scenario would calling updateRecord(void recordUpdater(), String id) cause potential issues without proper validation checks inside recordUpdater()?
When printing confirmation messages after successful updates.
When formatting output before displaying updated record information.
When id refers to nonexistent records.
When updating fields within existing records.
In order to process multiple conditions where each condition has its separate set of actions to perform, which control structure would typically be most efficient?
if-else chain
logical operator ( && or ||) based expressions
nested switch statements
recursive method calls
Given a void method configure(Settings setup) in a base class Device, how should it be called correctly from within another void method initialize() of its subclass 'Smartphone' without altering the original settings object passed as an argument?
super.configure(new Settings(setup))
configure(this.setup)
super.configure(setup.clone())
this.configure(new Settings(setup))
How do you verify that the parameters passed to void methods produce expected behaviors?
Always pass the same hard-coded values when testing.
Run tests using different arguments and check the results.
Assume the methods work properly without testing them.
Ignore errors since they don't return any values anyway.

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How should you call void updateScore(int deltaScore) to decrease current score variable inside class instance named game by twenty points ?
game.getUpdateScore(-20); //Incorrect Method Name
game.updateScor(); //missing argument
game.updateScore(-20);
game.updateScore(+20);
How does defining a void method with parameters influence the way you make a call to this method?
A change in argument parameters affects the values used inside the method but does not change the method's definition itself.
The execution flow of the program is redirected to a third body of code in the method definition, allowing for replacement of parameter values, hence changes to the parameter at runtime, followed by the values passed to it when the method is called.
The memory allocation for the program changes and consequently causes a crash.
Results in a syntax error as the method's definition has not been properly completed.
Consider the following method:
public void calculateSquareRoot(double n) { double squareRoot = Math.sqrt(n); printSquareRoot(n, squareRoot); } public void printSquareRoot(double n, double squareRoot) { System.out.print("Square root of " + n + " = " + squareRoot); } Assume that the method calculateSquareRoo...
Square root of 16 = 4.0
16^2 = 4
Square root of 4.0 = 16
4.0^2 = 16