COP 3330 EXAM 2 CORE C++ CLASSES,
INHERITANCE, AND POLYMORPHISM REVIEW
2026
◉ In a public interface body what are automatically considered
public even if the programmer doesn't put the public access modifier
on the associated method or member?
Answer: static methods
Constant declarations
default methods
abstract methods
◉ If an interface is declared public then a programmer can omit the
public access modifier for all abstract, default, and static methods.
Answer: True
◉ A programmer can define a reference variable with an interface as
its data type if the constructor call to the left of the equals sign (=) is
a class instance that implements that interface.
Answer: True
◉ If a class implements an interface and extends a class, the
resulting class can be an instance of:
,1. The interface
2. The superclass
3. The subclass
Answer: True
◉ What is NOT a benefit of default methods in an interface?
Answer: Defining what the method should do when implemented
◉ What is exception short for?
Answer: exceptional event
◉ Why does an exception occur?
Answer: A network connection has been lost in the middle of
communications or the JVM has run out of memory
A file that needs to be opened cannot be found
A user has entered invalid data
, ◉ Which of the following is NOT one of the three categories of
Exceptions you need to understand how exception handling works
in an OOP language like Java?
Answer: Known exceptions
◉ What is a checked exception?
Answer: An exception that occurs at the compile time
◉ What is an unchecked exception?
Answer: An exception that occurs at the time of execution
◉ What is an error?
Answer: Problems that arise beyond the control of the user or the
programmer
◉ What class are all exception classes a subtype of?
Answer: java.lang.Exception
◉ Errors, if the application is programmed correctly, can always be
handled by the Java programs
Answer: False
INHERITANCE, AND POLYMORPHISM REVIEW
2026
◉ In a public interface body what are automatically considered
public even if the programmer doesn't put the public access modifier
on the associated method or member?
Answer: static methods
Constant declarations
default methods
abstract methods
◉ If an interface is declared public then a programmer can omit the
public access modifier for all abstract, default, and static methods.
Answer: True
◉ A programmer can define a reference variable with an interface as
its data type if the constructor call to the left of the equals sign (=) is
a class instance that implements that interface.
Answer: True
◉ If a class implements an interface and extends a class, the
resulting class can be an instance of:
,1. The interface
2. The superclass
3. The subclass
Answer: True
◉ What is NOT a benefit of default methods in an interface?
Answer: Defining what the method should do when implemented
◉ What is exception short for?
Answer: exceptional event
◉ Why does an exception occur?
Answer: A network connection has been lost in the middle of
communications or the JVM has run out of memory
A file that needs to be opened cannot be found
A user has entered invalid data
, ◉ Which of the following is NOT one of the three categories of
Exceptions you need to understand how exception handling works
in an OOP language like Java?
Answer: Known exceptions
◉ What is a checked exception?
Answer: An exception that occurs at the compile time
◉ What is an unchecked exception?
Answer: An exception that occurs at the time of execution
◉ What is an error?
Answer: Problems that arise beyond the control of the user or the
programmer
◉ What class are all exception classes a subtype of?
Answer: java.lang.Exception
◉ Errors, if the application is programmed correctly, can always be
handled by the Java programs
Answer: False
