C Sc 227 Practice Quiz 2 Name_________________________________ 50pts
Complete as many Array2 JavaBat problems as you can. Here are some other sample questions
1. Write the output generated by the following code (4pts)
int[] x = { 5, 6, 2, 3, 5 };
int n = x.length;
for(int j = n - 1; j > 0; j--)
x[j] = x[j-1];
for(int j = 0; j < n; j++)
System.out.print(" " + x[j]);
2. Complete method exists to return true if a String is found at least once in an array of Strings. If the String
is not found in the array, return false. (10pts)
@Test public void testExists() {
String[] names = { "Li", "Devon", "Sandeep", "Chris", "Regan" };
assertTrue(exists("Li", names, 5));
assertTrue(exists("Sandeep", names, 5));
assertTrue(exists("Regan", names, 5));
assertFalse(exists("NOT HERE", names, 5));
}
public boolean exists(String search, String[] names, int n) {
3. Complete method sortEnds such that the smallest value is swapped with the value at index 0 and the
largest value is swapped with the value at index n-1. The assertions in the test method must pass. (10pts)
@Test public void testSortEnds () {
int[] x = { 4, 3, 1, 5, 7, 6, 2 };
sortEnds(x, x.length);
assertEquals(1, x[0]);
assertEquals(3, x[1]);
assertEquals(4, x[2]);
assertEquals(5, x[3]);
assertEquals(2, x[4]);
assertEquals(6, x[5]);
assertEquals(7, x[6]);
}
public void sortEnds(int[] x, int n) {
