Java Basics Recap

Which method to use to find length of a string?

• length()

• size()

• long()

• count()

Is String a primitive data type?

• Yes

• No

• Both

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()

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)

What is the return type of equalsIgnorecase() method?

• int

• String

• char

• boolean

What is the most appropriate way to check if two Strings are identical?

• string1 == string2

• string1.equals(string2)

• string1.same(string2)

• string1.equalsIgnorecase(string2)

What is the correct relation between length and last-index of array?

• last-index is always 1 more than the length

• last-index is 1 less than the length (but not always)

• last-index is always 1 less than the length

• last-index is always equal to the length

What will get stored in variable word after the evaluation of the below given code snippet:

String txt,word;

txt="bookmark";

word=txt.substring(txt.indexOf('k')+1);