Collection2

Which of the following are true about the following code? (Choose all that apply)

public class Create {

Create() { System.out.print("1 "); }

Create(int num) {

System.out.print("2 "); }

Create(Integer num) {

System.out.print("3 "); }

Create(Object num) {

System.out.print("4 "); }

Create(int... nums) { System.out.print("5 "); }

public static void main(String[] args) {

new Create(100);

new Create(1000L); } }

• 2 4

• 3 4

• 2 5

• compile error

Which of the following lambda expressions can fill in the blank?

List list = new ArrayList<>();

list.removeIf(___________________);

• s -> s.isEmpty()

• s -> {s.isEmpty()}

• s -> {s.isEmpty();}

• s -> {return s.isEmpty();}

What is the result of the following statements?

3: ArrayList<Integer> values = new ArrayList<>();

4: values.add(4);

5: values.add(5);

6: values.set(1, 6);

7: values.remove(0);

8: for (Integer v : values)

System.out.print(v);

• 5

• 6

• 4

• compile error

What will be the output?

List<Integer> ages = new ArrayList<>();

ages.add(Integer.parseInt("5"));

ages.add(Integer.valueOf("6"));

ages.add(7);

ages.add(null);

for (int age : ages) System.out.print(age);

• 5 6 7

• Compilation error

• Runtime exception

List<String> one = new ArrayList<String>();

one.add("abc");

List<String> two = new ArrayList<>();

two.add("abc");

if (one == two)

System.out.println("A");

else if (one.equals(two))

System.out.println("B");

else

System.out.println("C");

• A

• B

• C

• Run time exception