Java Constructors Methods

How many constructors does this Java class have?

• 0

• 1

• 2

• 3

What is the job of a Java class's fields?

• Used for communication with an object of this class type

• Used for calculations when an object is constructed

• Allows for import statements in this class

• Store the state of an object of this class type

What of the following is the default value of an instance variable?

• null

• 0

• Depends upon the type of variable

• Not assigned

Can we have multiple classes in same java file?

• True

• False

What is the return type of Constructors?

• int

• float

• void

• none of the mentioned

Which of this statement is incorrect?

• All object of a class are allotted memory for the all the variables defined in the class

• If a function is defined public it can be accessed by object of other class by inheritance.

• main() method must be made public

• All object of a class are allotted memory for the methods defined in the class

This is an example of a non-return method.

• True

• False

Write method header to Return a sales commission, given the sales amount and the commission rate

• public static double getCommission(double salesAmount)

• public static double getCommission(double salesAmount, double commissionRate)

• double getCommission(double salesAmount, double commissionRate)

• public static double(double salesAmount, double commissionRate)

Write method header to Return a square root of a number

• public static void double sqrt(value)

• public static void double sqrt(double value)

• public static double sqrt(value)

• public static double sqrt(double value)

The body of a method definition is contained within a set of ______________.

• parentheses

• rectangle brackets

• curly braces

• angle brackets