FoundationMistakesLearnFromIt

Question 1

Rules for switch statementn n

Answer 1

String
char
int
byte
short

Question 2

If neither super() or this() is declared as the first statement, the implicit default constructor will be what?

Answer 2

super();

Question 3

What happens when u don’t define a default constructor?

Answer 3

• The jvm will add a default constructor automatically.

- calls the no-args constructor of the super class

Question 4

Name the constructor for the Boolean class

Answer 4

Boolean(String)
Boolean(boolean)
they give you a Boolean object.
So Boolean(String) is “true” then true.

Question 5

Can you name the two static helper methods for the Boolean class?

Answer 5

parseBoolean(String)
valueOf(boolean)
the return type is primitive boolean not the object

Question 6

What are the short circut operators

Answer 6

|| and &&