Blog

All hamsters are rodents and all rodents are mammals.  What hierarchy best captures this information?

Which of the following generate action events?

Which statement about methods in an interface is true?

Consider the following code snippet: public static void main(String[] args) throws FileNotFoundException Which of the following statements about this code is correct?

Which process is recommended for calculating the elapsed running time of an algorithm?

Listeners are typically implemented as inner classes. Which of the following statements is NOT true about inner class access to variables from the surrounding class?

A portion of your program includes the loop shown in the code snippet below to examine the elements of an array arr: int count = 0; int targetVal = 70; for (int i = 0; i < arr.length; i++) { if (arr[i] >= targetVal) { count++; } } What can you conclude about the running time of this section of code?

Consider the permutations method from the textbook, which is intended to return all permutations of the word passed in as a parameter. Which line contains the terminating condition in the permutations recursive method? public static ArrayList permutations(String word) { ArrayList result = new ArrayList(); if (word.length() == 0) // line #1 { result.add(word); // line #2 return result; // line #3 } else { for (int i = 0; i < word.length(); i++) // line #4 { String shorter = word.substring(0, i) + word(substring(i + 1); // line #5 ArrayList shorterPermutations = permutations(shorter); // line #6 for (String s : shorterPermutations) // line #7 { result.add(word.charAt(i) + s); // line #8 } } return result; // line #9 } }

What is the default layout manager of JPanel?

Which of the following statements correctly provides a comparator function using lambda expressions to sort an array of countries by population, assuming the existence of a getPopulation method?