Sun
Java Certified Professional Exam Objective
Revised on Oct 4-2000
Test Code : 310-025
Section
1 Declarations and Access Control
Write
code that declares, constructs, and initializes arrays of
any base type using any of the permitted forms both for
declaration and for initialization.
Declare
classes, inner classes, methods, instance variables,
static variables, and automatic (method local) variables
making appropriate use of all permitted modifiers (such as
public, final, static, abstract, and so forth). State the
significance of each of these modifiers both singly and in
combination, and state the effect of package relationships
on declared items qualified by these modifiers.
For a
given class, determine if a default constructor will be
created, and if so, state the prototype of that
constructor.
State
the legal return types for any method given the
declarations of all related methods in this or parent
classes.
Section
2 FLOW CONTROL AND EXCEPTION HANDLING
Write
code using if and switch statements and identify legal
argument types for these statements.
Write
code using all forms of loops including labeled and
unlabeled use of break and continue, and state the values
taken by loop control variables during and after loop
execution.
Write
code that makes proper use of exceptions and exception
handling clauses (try, catch, finally) and declares
methods and overriding methods that throw exceptions.
Section
3 Garbage Collection
State
the behavior that is guaranteed by the garbage collection
system, and write code that explicitly makes objects
eligible for collection.
Section
4 Language Fundamentals
Identify
correctly constructed source files, package declarations,
import statements, class declarations (of all forms
including inner classes), interface declarations and
implementations (for java.lang.Runnable or other interface
described in the test), method declarations (including the
main method that is used to start execution of a class),
variable declarations and identifiers.
State
the correspondence between index values in the argument
array passed to a main method and command line arguments.
Identify all Java Programming Language keywords and
correctly constructed identifiers.
State
the effect of using a variable or array element of any
kind when no explicit assignment has been made to it.
State
the range of all primitive data types and declare literal
values for String and all primitive types using all
permitted formats, bases, and representations.
Section
5 Operators and assignments
Determine
the result of applying any operator, including assignment
operators, instanceof, and casts to operands of any type,
class, scope, or accessibility, or any combination of
these.
Determine
the result of applying the boolean equals(Object) method
to objects of any combination of the classes
java.lang.String, java.lang.Boolean, and java.lang.Object.
In an
expression involving the operators &, |, &&,
||, and variables of known values state which operands are
evaluated and the value of the expression.
Determine
the effect upon objects and primitive values of passing
variables into methods and performing assignments or other
modifying operations in that method.
Section
6 Overloading, Overriding, Runtime Type, and Object
Orientation
State
the benefits of encapsulation in object oriented design
and write code that implements tightly encapsulated
classes and the relationships "is a" and
"has a".
Write
code to invoke overridden or overloaded methods and
parental or overloaded constructors; and describe the
effect of invoking these methods.
Write
code to construct instances of any concrete class
including normal top level classes, inner classes, static
inner classes, and anonymous inner classes.
Section
7 Threads
Write
code to define, instantiate, and start new threads using
both java.lang.Thread and java.lang.Runnable.
Recognize
conditions that might prevent a thread from executing.
Write
code using synchronized, wait, notify, or notifyAll, to
protect against concurrent access problems and to
communicate between threads. Define the interaction
between threads and between threads and object locks when
executing synchronized, wait, notify, or notifyAll.
Section
8 The java.awt PACKAGE
Write
code using component, container, and LayoutManager classes
of the java.awt package to present a GUI with specified
appearance and resize behavior, and distinguish the
responsibilities of layout managers from those of
containers.
Write
code to implement listener classes and methods, and in
listener methods, extract information from the event to
determine the affected component, mouse position, nature,
and time of the event. State the event classname for any
specified event listener interface in the java.awt.event
package.
Section
9 The java.lang PACKAGE
Write
code using the following methods of the java.lang.Math
class: abs, ceil, floor, max, min, random, round, sin, cos,
tan, sqrt.
Describe
the significance of the immutability of String objects.
Section
10 The java.util PACKAGE
Make
appropriate selection of collection classes/interfaces to
suit specified behavior requirements.
Section
11 The java.io PACKAGE
Write
code that uses objects of the file class to navigate a
file system.
Write
code that uses objects of the classes InputStreamReader
and OutputStreamWriter to translate between Unicode and
either platform default or ISO 8859-1 character encoding
and Distinguish between conditions under which platform
default encoding conversion
should be used and conditions under which a specific
conversion should be used.
Select
valid constructor arguments for FilterInputStream and
FilterOutputStream
subclasses from a list of classes in the java.io.package.
Write
appropriate code to read, write and update files using
FileInputStream, FileOutputStream, and RandomAccessFile
objects.
Describe
the permanent effects on the file system of constructing
and using FileInputStream, FileOutputStream, and
RandomAccessFile objects.
