2D Arrays in AP Computer Science A
What is the general structure for traversing a 2D array?
Consider the 'Snaking Around' example. Which part of the code is responsible for alternating the direction of traversal in each row?
Which of the following algorithms, when implemented on a 2D array, would require modification of the array's elements and therefore cannot effectively use enhanced for loops for primitive types?
Given the 2D array arrayB as defined in the notes, what will be printed by the following code snippet?
java
for (int i = 0; i < arrayB.length; i++) {
for (int j = 0; j < arrayB[0].length; j++) {
System.out.print(arrayB[i][j] + " ");
}
}
Which code segment correctly traverses through different columns in reverse order?
Given the exampleOne method in the notes (Snaking Around example), what output would be generated if arrayB was a 1x4 array: {{1, 2, 3, 4}}?
What is the primary reason why enhanced for loops are not suitable for modifying the original values of primitive types within a 2D array in Java?
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Given the 2D array arrayB as defined in the notes, what will be the output of the following code?
java
for (int i = arrayB.length - 1; i >= 0; i--) {
for (int j = arrayB[0].length - 1; j >= 0; j--) {
System.out.print(arrayB[i][j] + " ");
}
}
Which of the following code snippets correctly implements column-major traversal for a 2D array arr?
Given a 2D array of Student objects, where Student has a setName method, can enhanced for loops be used to change the names of the Student objects in the array, and why?