Creating and Destroying Objects Quiz
Creating and Destroying Objects Quiz
Test your knowledge on object creation and destruction in programming with our engaging quiz. This quiz covers a variety of concepts, including static factory methods, Singleton patterns, memory management, and much more.
- Challenge yourself with 9 questions
- Multiple choice and checkbox formats
- Instant feedback on your answers
String s = new String("Hello World");public class Person {private final Date birthDate;// Other fields, methods, and constructor omittedpublic boolean isBabyBoomer() {Calendar gmtCal = Calendar.
getInstance(TimeZone.getTimeZone("GMT"));gmtCal.set(1946, Calendar.JANUARY, 1, 0, 0, 0);Date boomStart = gmtCal.getTime();gmtCal.set(1965, Calendar.JANUARY, 1, 0, 0, 0);Date boomEnd = gmtCal.getTime();return birthDate.compareTo(boomStart) >= 0 &&
birthDate.compareTo(boomEnd) < 0;}}
Boolean b = Boolean.valueOf("true");public class Stack {
private Object[] elements;
private int size = 0;
private static final int DEFAULT_INITIAL_CAPACITY = 16;
public Stack() {
elements = new Object[DEFAULT_INITIAL_CAPACITY];
}
public void push(Object e) {
ensureCapacity();
elements[size++] = e;
}
public Object pop() {
if (size == 0)
throw new EmptyStackException();
Object result = elements[--size];
return result;
}
private void ensureCapacity() {
if (elements.length == size)
elements = Arrays.copyOf(elements, 2 * size + 1);
}
}
public enum MySingleton {
INSTANCE;
private MySingleton() {
System.out.print("Boo");
}
}
public static void main(String[] args) {
System.out.println(MySingleton.INSTANCE);
}