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1Z0-803 Java SE 7 Programmer I
Working with Inheritance

Implement inheritance
Develop code that demonstrates the use of polymorphism
Differentiate between the type of a reference and the type of an object
Determine when casting is necessary
Use super and this to access objects and constructors
Use abstract classes and interfaces

Handling Exceptions
Differentiate among checked exceptions, RuntimeExceptions and Errors
Create a try-catch block and determine how exceptions alter normal program flow
Describe what exceptions are used for in Java
Invoke a method that throws an exception
Recognize common exception classes and categories

Free 1Z0-803 Demo Download
An unchecked exception occurs in a method dosomething(). Should other code be added in the dosomething() method for it to compile and execute?
A.The Exception must be caught
B.The Exception must be declared to be thrown.
C.The Exception must be caught or declared to be thrown.
D.No other code needs to be added.
Answer: D

Given the code fragment:
String valid = “true”;
if (valid) System.out.println (”valid”);
else system.out.println (”not valid”);
What is the result?
A.Valid
B.not valid
C.Compilation fails
D.An IllegalArgumentException is thrown at run time
Answer: C

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