WorksheetsJava String class methods
Total questions: 10
Worksheet time: 7mins
Which method would you use to check if two Strings are exactly the same?
equals()
equalsIgnoreCase()
toUpperCase()
toLowerCase()
Which method was used to convert this String: "IT learners are clever" to "IT LEARNERS ARE CLEVER" ?
toUpperCase()
toLowerCase()
equalsIgnoreCase()
compareTo()
Which method was used to convert this String: "Life is TOO SHORT to be BORED" to: "life is too short to be bored" ?
toLowerCase()
toUpperCase()
equals()
equalsIgnoreCase()
Is String a primitive data type?
Yes
No
Both
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);
String txt = "Hello World";
System.out.println(txt.toUpperCase());
Choose the correct output.
"HELLO WORLD"
HELLO WORLD
Hello world
Hello World
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"
