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Beginner Java
Tutorial
JDBC Tutorial
Java Interview
Questions
Sun Certification Material
(SCJP)
A Programmer's Guide to Java Certification - by Khalid Mughal and Rolf Rasmussen -
very very good ebook for the exam. This one contains detailed description, and explains IO,
Threads, GC etc quite well.
Complete Java2 Certification Guide
This site provides all the information you would need to prepare for Suns Certification exam (SCJP2). It provides study material, sample questions for all the topics covered in the exam, a Certification FAQ, a mock exam, and links to many other related sites.
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SCJP 5.0 Exam Objectives ( taken from
java.sun.com )
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Section 1: Declarations, Initialization and Scoping
* Develop code that declares classes (including abstract and all
forms of nested classes), interfaces, and enums, and includes
the appropriate use of package and import statements (including
static imports).
* Develop code that declares an interface. Develop code that
implements or extends one or more interfaces. Develop code that
declares an abstract class. Develop code that extends an
abstract class.
* Develop code that declares, initializes, and uses primitives,
arrays, enums, and objects as static, instance, and local
variables. Also, use legal identifiers for variable names.
* Develop code that declares both static and non-static methods,
and - if appropriate - use method names that adhere to the
JavaBeans naming standards. Also develop code that declares and
uses a variable-length argument list.
* Given a code example, determine if a method is correctly
overriding or overloading another method, and identify legal
return values (including covariant returns), for the method.
* Given a set of classes and superclasses, develop constructors
for one or more of the classes. Given a class declaration,
determine if a default constructor will be created, and if so,
determine the behavior of that constructor. Given a nested or
non-nested class listing, write code to instantiate the class.
Section 2: Flow Control
* Develop code that implements an if or switch statement; and
identify legal argument types for these statements.
* Develop code that implements all forms of loops and iterators,
including the use of for, the enhanced for loop (for-each), do,
while, labels, break, and continue; and explain the values taken
by loop counter variables during and after loop execution.
* Develop code that makes use of assertions, and distinguish
appropriate from inappropriate uses of assertions.
* Develop code that makes use of exceptions and exception
handling clauses (try, catch, finally), and declares methods and
overriding methods that throw exceptions.
* Recognize the effect of an exception arising at a specified
point in a code fragment. Note that the exception may be a
runtime exception, a checked exception, or an error.
* Recognize situations that will result in any of the following
being thrown: ArrayIndexOutOfBoundsException,ClassCastException,
IllegalArgumentException, IllegalStateException,
NullPointerException, NumberFormatException, AssertionError,
ExceptionInInitializerError, StackOverflowError or
NoClassDefFoundError. Understand which of these are thrown by
the virtual machine and recognize situations in which others
should be thrown programatically.
Section 3: API Contents
* Develop code that uses the primitive wrapper classes (such as
Boolean, Character, Double, Integer, etc.), and/or autoboxing &
unboxing. Discuss the differences between the String,
StringBuilder, and StringBuffer classes.
* Given a scenario involving navigating file systems, reading
from files, or writing to files, develop the correct solution
using the following classes (sometimes in combination), from
java.io: BufferedReader,BufferedWriter, File, FileReader,
FileWriter and PrintWriter.
* Develop code that serializes and/or de-serializes objects
using the following APIs from java.io: DataInputStream,
DataOutputStream, FileInputStream, FileOutputStream,
ObjectInputStream, ObjectOutputStream and Serializable.
* Use standard J2SE APIs in the java.text package to correctly
format or parse dates, numbers, and currency values for a
specific locale; and, given a scenario, determine the
appropriate methods to use if you want to use the default locale
or a specific locale. Describe the purpose and use of the
java.util.Locale class.
* Write code that uses standard J2SE APIs in the java.util and
java.util.regex packages to format or parse strings or streams.
For strings, write code that uses the Pattern and Matcher
classes and the String.split method. Recognize and use regular
expression patterns for matching (limited to: . (dot), * (star),
+ (plus), ?, \d, \s, \w, [], ()). The use of *, +, and ? will be
limited to greedy quantifiers, and the parenthesis operator will
only be used as a grouping mechanism, not for capturing content
during matching. For streams, write code using the Formatter and
Scanner classes and the PrintWriter.format/printf methods.
Recognize and use formatting parameters (limited to: %b, %c, %d,
%f, %s) in format strings.
Section 4: Concurrency
* write code to define, instantiate, and start new threads using
both java.lang.Thread and java.lang.Runnable.
* Recognize the states in which a thread can exist, and identify
ways in which a thread can transition from one state to another.
* Given a scenario, write code that makes appropriate use of
object locking to protect static or instance variables from
concurrent access problems.
* Given a scenario, write code that makes appropriate use of
wait, notify, or notifyAll.
Section 5: OO Concepts
* Develop code that implements tight encapsulation, loose
coupling, and high cohesion in classes, and describe the
benefits.
* Given a scenario, develop code that demonstrates the use of
polymorphism. Further, determine when casting will be necessary
and recognize compiler vs. runtime errors related to object
reference casting.
* Explain the effect of modifiers on inheritance with respect to
constructors, instance or static variables, and instance or
static methods.
* Given a scenario, develop code that declares and/or invokes
overridden or overloaded methods and code that declares and/or
invokes superclass, overridden, or overloaded constructors.
* Develop code that implements "is-a" and/or "has-a"
relationships.
Section 6: Collections / Generics
* Given a design scenario, determine which collection classes
and/or interfaces should be used to properly implement that
design, including the use of the Comparable interface.
* Distinguish between correct and incorrect overrides of
corresponding hashCode and equals methods, and explain the
difference between == and the equals method.
* Write code that uses the generic versions of the Collections
API, in particular, the Set, List, and Map interfaces and
implementation classes. Recognize the limitations of the
non-generic Collections API and how to refactor code to use the
generic versions.
* Develop code that makes proper use of type parameters in
class/interface declarations, instance variables, method
arguments, and return types; and write generic methods or
methods that make use of wildcard types and understand the
similarities and differences between these two approaches.
* Use capabilities in the java.util package to write code to
manipulate a list by sorting, performing a binary search, or
converting the list to an array. Use capabilities in the
java.util package to write code to manipulate an array by
sorting, performing a binary search, or converting the array to
a list. Use the java.util.Comparator and java.lang.Comparable
interfaces to affect the sorting of lists and arrays.
Furthermore, recognize the effect of the "natural ordering" of
primitive wrapper classes and java.lang.String on sorting.
Section 7: Fundamentals
* Given a code example and a scenario, write code that uses the
appropriate access modifiers, package declarations, and import
statements to interact with (through access or inheritance) the
code in the example.
* Given an example of a class and a command-line, determine the
expected runtime behavior.
* Determine the effect upon object references and primitive
values when they are passed into methods that perform
assignments or other modifying operations on the parameters.
* Given a code example, recognize the point at which an object
becomes eligible for garbage collection, and determine what is
and is not guaranteed by the garbage collection system.
Recognize the behaviors of System.gc and finalization.
* Given the fully-qualified name of a class that is deployed
inside and/or outside a JAR file, construct the appropriate
directory structure for that class. Given a code example and a
classpath, determine whether the classpath will allow the code
to compile successfully.
* Write code that correctly applies the appropriate operators
including assignment operators (limited to: =, +=, -=),
arithmetic operators (limited to: +, -, *, /, %, ++, --),
relational operators (limited to: <, <=, >, >=, ==, !=), the
instanceof operator, logical operators (limited to: &, |, ^, !,
&&, ||), and the conditional operator ( ? : ), to produce a
desired result. Write code that determines the equality of two
objects or two primitives.
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Get in touch with me
personally at
hemanthjava@gmail.com
OTHER SITES OF MINE
FRESHERS JOBS AND PLACEMENT PAPERS
VTU PROJECTS AND PROGRAMS
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1. JGE
(2D Graphics editor)
These Mock exams will get you started with some simple practice questions. Its a great way to begin your SCJP
1.4 training.
Mock Exam Engine
1. Marcus Green Mock Exam 1
2. Marcus Green Mock Exam 2
3. Marcus Green Mock Exam 3
4.
Java Test
5. Mock
6. Java Quiz 1
7. Java Quiz 2
8.
Java
Certification Mock Exam
9.
SCJP Mock Exam - 1
10.
Sun Certification Dumps
1. eclipse1.doc
: A Simple tutorial showing how to create a project and execute code.
2. eclipse2.doc
: Frequently used Settings an Eclipse user should take care.
3. eclipse3.rtf
: Eclipse keyboard Shortcuts.
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