Java String and Array

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

Which is correct method to convert String into uppercase: changeUpperCase(), convertUpperCase(), toUpper(), toUpperCase()?

Back

toUpperCase()

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

String x = "10";
String y = "20";
String z = x + y;
System.out.println(z);
Guess the output.

Back

1020

Front

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

Back

to remove extra white spaces from start and end of String

Front

What is the return type of equalsIgnorecase() method?

Back

boolean