Example Code Ch 12-3

question 52

Multiple Choice

Example Code Ch 12-3
Given the two recursive methods shown below, foo and bar.
Assume int[] a = {6, 2, 4, 6, 2, 1, 6, 2, 5}
public int foo(int[] a, int b, int j)
{
if (j < a.length)
if (a[j] != b) return foo (a, b, j+1) ;
else return foo (a, b, j+1) + 1;
else return 0;
}
public int bar(int[] a, int j)
{
if (j < a.length)
return a[j] + bar(a, j+1) ;
else return 0;
}
-Refer to Example Code 12-3: What is the result of calling foo(a, 2, 0) ?

• A) 0
• B) 1
• C) 2
• D) 3
• E) 4

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Definitions:

Fixed Interval

A schedule of reinforcement where the first response is rewarded only after a specified amount of time has elapsed, leading to a pattern of response immediately after the interval passes.

Variable Interval

describes a schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, enhancing response consistency.

Fixed-ratio

A reinforcement schedule in which a behavior is rewarded after a certain number of responses have been made.

Variable-ratio

A type of reinforcement schedule in operant conditioning where a response is reinforced after an unpredictable number of responses, making it very effective in maintaining high rates of responding.