JAVA string

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);

Which is correct method to convert String into uppercase

• changeUpperCase()

• convertUpperCase()

• toUpper()

• toUpperCase()

String word = "A few good men";
What is word.charAt(7) ?

• o
• g
• 7
• good men

String word = "A few good men";
What is word.length()?

• 14
• 15
• 13

Which method to use to find length of a string?

• length()

• size()

• long()

• count()

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)

Is String a primitive data type?

• Yes

• No

• Both

Choose most appropriate purpose of trim() method in String?

• to remove white spaces

• to get a substring of the string

• to cut String at desired index

• to remove extra white spaces from start and end of String

What is the return type of equalsIgnorecase() method?

• int

• String

• char

• boolean