1
public class Dog { // implementation not shown}
public class Cat { // implementation not shown}
public class Main {
public static void main(String[] args) {
Dog dog = new Dog(); dog.name = “doggy”;
Cat cat = new Cat(); cat.name = “catty”;
System.out.println(dog.name);
System.out.println(cat.name); } }
Assuming that Dog and Cat have accessible and functional initialisers, what will be the output of this code?
doggy
catty
public class Example {
public static void main(String[] args) {
int x = 5;
if (x > 3) {
x = x + 2;
} else {
x = x - 2; } } }
What is value of x after the code segment executes?
7
How many stars are output when the following code is executed?
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 5; j++)
System.out.println("*");
}
25
What does this boolean expression evaluate to?
(!(!a || !b) && !(!(a && b!))) || !(!(a && !b))
In which of the following codes does c correctly evaluate to the hypotenuse of a right triangle?
a) double a; double b; double c = Math.sqrt(a*a + b*b);
b) int a; int b; double c = a*a + b*b; c = Math.sqrt(c, 2);
c) int a; double b; int c = Math.sqrt(a*a + b*b, 2);
a
Consider the following code: (int)(Math.random() * (y - x)) + y.
What is the upper and lower bounds of this random function?
Lower: y
Upper: 2y - x
boolean x = true;
boolean y = false;
boolean z = true;
if ((!x || y) && (x || !y || z)) {
System.out.print(x && (!y || !z));
}
What is output?
Nothing
public class Book() {
private int pages;
private String title;
private int lexile;
public Book() {
pages = 420;
title = “Romeo and Juliet”;
lexile = 1000; } }
If someone creates a new book object called book1 in a Main class, what is outputted when they print book1.lexile?
Nothing
What three escape sequences have we learned in class and what do they do?
\" = prints quote symbol
\\ = prints backslash symbol
\n = prints newline character