Java String & Math Class Review

Front

Is String a primitive data type?

Back

No

Front

Which method to use to find length of a String?

Back

length()

Front

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

Back

int

Front

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

Back

int len = txt.length();

Front

String txt = "Hello World";
System.out.println(txt.toUpperCase());
Choose the correct output.

Back

HELLO WORLD

Front

Choose correct purpose of indexOf() in String class.

Back

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

Front

What is the output of the following code?
String firstName = "John ";
String lastName = "Doe";
System.out.println(firstName.concat(lastName));

Back

John Doe

Front

String x = "10"; String y = "20"; String z = x + y; Guess the output.

Back

1020

Front

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

Back

string1.equals(string2)

Front

We are use Scanner Library in java for...

Back

Allows the user to enter data