OCA Java SE 8 Programmer I Certification Guide

8.1. Mock exam

ME-Q1)

Given the following definition of the classes Animal, Lion, and Jumpable, select the correct combinations of assignments of a variable that don’t result in compilation errors or runtime exceptions (select 2 options).

interface Jumpable {}
class Animal {}
class Lion extends Animal implements Jumpable {}

1. Jumpable var1 = new Jumpable();
2. Animal var2 = new Animal();
3. Lion var3 = new Animal();
4. Jumpable var4 = new Animal();
5. Jumpable var5 = new Lion();
6. Jumpable var6 = (Jumpable)(new Animal());

ME-Q2)

Given the following code, which option, if used to replace /* INSERT CODE HERE */, will make the code print 1? (Select 1 option.)

try { String[][] names = {{"Andre", "Mike"}, null, {"Pedro"}}; System.out.println (names[2][1].substring(0, ...