Strings In java

Which type of data is used to enter the value ("Welcome")?

• Text
• Characters
• String
• Boolean

Which type of data is used to enter the value (1234.5)?

• Integer

• double

• char

• void

What do we use the Scanner Library in java for?

• Give permissions to the user

• Correcting software errors

• Allows user to read data

• Allows the user to enter data

To concatenate the programmer must: 

• have quotations (" ")
• use the plus symbol + 
• escape sequences (\t\n)
• use System.out.print( );

What is the output for the following statement:

System.out.print("1"+"1");

• 11

• 2

• Error Message

• 1+1

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);

Which is correct method to convert String into uppercase

• changeUpperCase()

• convertUpperCase()

• toUpper()

• toUpperCase()

String firstName = "John ";

String lastName = "Doe";

System.out.println(firstName.concat(lastName));

Guess the output.

• John.concat(Doe)

• John Doe

• JohnDoe

• "John Doe"