Reference no: EM131104882

Question 1: In order to force a conversion from one data type to another we can use:

format controls

unification

upward compatibility

casting

Question 2: True or false: The logical OR operator has a higher precedence in Java than the logical AND, the conditional, and the equality operators.

True

False

Question 3: The logical AND operator in java is:

and

l l

+

&&

Question 4: True or False: To write a "definite loop" in Java, you use a loop control variable that has its value modified upon each iteration of the loop.

True

False

Question 5: How are entire arrays passed from one method to another?

by value

by reference

both a and b

none of the above

Question 6: True or False: If you do not explicitly create a constructor for a Java class then Java creates a default constructor for you.

 True

False

Question 7: True or False: Java enhances portability by consistently specifying the size and format of its primitive data types, regardless of the platform on which a Java program is running.

True

False

Question 8: If we want to allow a String to expand in size from its original size then we should use it to create an object of what class(es)?

Character

String

StringBuilder or StringBuffer

Buffer

Question 9: Which of these is not a Java primitive data type?

char

number

float

boolean

Question 10: True or False: The Java compiler converts source code into machine code that is specific to the host processor where it is being compiled.

True

False

Question 11: The portion of a program within which you can refer to a variable is called its

range

scope

limits

abstraction block

Question 12: Like most high-level programming languages, Java uses the one byte long ASCII code set for character representation.

True

False

Question 13: Overload methods must vary in their:

range

names

program placement

number of data types in their arguments.

Question 14: True or False: A non-void method must have a return statement that returns a value of the specified return type.

True

False

Question 15: True or False: Strings are an example of an immutable object.

True

False

Question 16: True or False: If you want to make sure that the code within the body of a loop may never get executed at all, you should use a do..while loop construct.

True

False

Question 17: True or False: Instance variables can be static.

True

False

Question 18: True or False:  One of the advantages of using a Java class is that all objects that are instantiated (created) from that class will have the same methods, therefore giving them the same "behavior."

True

False

Question 19: The hiding of data within an object of a class is made possible by which object-oriented concept?

inheritance

polymorphism

encapsulation

none of the above

Question 20: True or false: One of the advantages of Java abstraction is that in order to call the method of an object you only need to know its interface, not its implementation details.

True

False