APCSA Unit 2 Review

Which data type gets returned from length() method in String class?

What is the correct way to find the length of the string "txt"? Options: int len = length(txt);, float len = txt.length();, int len = txt.length();, double len = length(txt);

Choose correct purpose of indexOf() in String class.

What is the output of the following?
String x = "10";
String y = "20";
String z = x + y;
System.out.println(z);

What is the return type of equals() method?

What is the most appropriate way to check if two Strings are identical? Options: string1 == string2, string1.equals(string2), string1.same(string2), string1.equalsIgnorecase(string2)

When you try to square root a negative number in Java, what happens?

Which Math class method can be used to calculate exponents? Options: Math.exponent(), Math.raise(), Math.pow(), Math.ceil()

Which Math class method can be used to calculate square roots?

What is an object?