1510 Chapter 2

If x is a String, then x = new String("OH"); and x = "OH"; will accomplish the same thing.

• True

• False

Answer explanation

fun fact: this is the "most correct" answer by Bruce's standards, but they dont quite do the same thing. Strings of the same value initialized via literals end up referencing the same bytes in memory. This is called "string pooling". Using the String constructor guarantees that new memory will be allocated for the String.

If x is the String "Hi There", then x.toUpperCase().toLowerCase(); will return the original value of x.

• True

• False

If String name = "Bruce"; then the instruction name.length(); will return 5.

• True

• False

If String a = "ABCD" and String b = "abcd" then a.equals(b); returns false but a.equalsIgnoreCase(b); returns true.

• True

• False

Unlike the String class where you must pass a message to an object (instance) of the class, as in x.length(), in order to use either the Scanner or Math classes, you pass messages directly to the class name, as in Math.abs() or scan.nextInt().

• True

• False

In order to generate a random number, you must use Math.random().

• True

• False

A double is wider than a float and a float is wider than an int.

• True

• False

A variable of type boolean will store either a 0 or a 1.

• True

• False

In Java, 'a' and 'A' are considered to be different values.

• True

• False

You cannot cast a String to be a char and you cannot cast a String which stores a number to be an int, float, or double.

• True

• False