The String Class

Question 1

What is the correct way to compare strings for equality?

Answer 1

equals()

Question 2

What is the value of x, given the following code?

String letters = “abcdefgh”;
char x = letters.charAt(3);

Answer 2

d

Question 3

What is the correct way to call a method that takes two parameters?

Answer 3

processData(3,6);

Question 4

What, if anything, is the value of x given the following code?

String word = "Programming";
var x = word.indexOf('u');

Answer 4

-1

Question 5

The primitive data type ‘int’ has a corresponding class. How is this class named?

Answer 5

Integer

Question 6

What method would you typically use to locate the position of the final ‘ri’ in ‘piri-piri’?

Answer 6

lastIndexOf()

Question 7

What is the effect of String’s trim() method?

Answer 7

Removes all spaces from the start and end of the String.

Question 8

Which is the correct method name for one which returns the number of characters in the string?

Answer 8

length()

Question 9

The primitive type char has a corresponding Class. What is it called?

Answer 9

Character