Java Basics Review (And Strings)

The keyword "method" is another name for

• an object

• a class

• a function

• a variable

Which of the following is incorrect?

• int count = 50.0;

• int salary = 50_000;

• int salary = 50_00;

• all of these are incorrect

What is at the end of a line of code?

• #
• ;
• )
• >

What does a comment look like in Java?

• //comment
• \\comment
• ==comment
• \comment

Which method to use to find length of a string?

• length()

• size()

• long()

• count()

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

• double

• String

• int

• number

String txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

What is the correct way to find the length of "txt" string?

• int len = length(txt);

• float len = txt.length();

• int len = txt.length();

• double len = length(txt);

Choose correct purpose of indexOf() in String class.

• returns the index (the position) of the last occurrence of a specified text in a string

• returns the character of the first occurrence of a specified character in a string

• returns the index (the position) of the first occurrence of a specified text in a string (excluding whitespace)

• returns the index (the position) of the first occurrence of a specified text in a string (including whitespace)

String x = "10";

String y = "20";

String z = x + y;

System.out.println(z);

Guess the output.

• 1020

• 10 20

• 30

• "10 20"

What will be the output of below code?

String statement = "Outfit of the day";

System.out.println(statement.Substring(3,6));

• it of

• tfit

• fit

• FIT