Test: Java Certification Exam
Category: Software
Description: This is a certification exam for the Java programming language
What is recursion?
It is when a function is defined in terms of itself
It is when a function is called until a StackOverflowException occurs
It means that a function is able to restart after an exception
It is a test condition (JUnit) implying that a method's output has passed
Which of the following is a legal method declaration?
public static void doStuff(void input)
public protected int doStuff(int input)
private synchronized doStuff()
public String doStuff(String input)
For performance reasons it is best to synchronize access to all instance variables.
True
False
What is a package?
A collection of class files in a jar file
A namespace that organizes a set of related classes and interfaces
A pre-compiled web application archive (war file)
A group of related abstract classes
In order to override a final method, you must declare the method as abstract in the base class.
True
False
Java "garbage collection" is performed only when the System.gc() method is called.
True
False
The keyword synchronized is:
used to prevent more than one thread from accessing a block of code at a time.
used to control thread priority
deprecated due to the introduction of ThreadLocal variables
only available in Java 5 and higher
The term API stands for:
Abstract Program Improvement
Absolute Program Initiative
Average Precompilation Interval
Application Programming Interface
Java Servlets are exclusively used for:
Interfacing with enterprise systems like PHP
Generating heavy-weight graphics objects on the server
Providing client applications with dynamic content
Initializing applets and returning their graphics context
How do you determine the number of characters in a String
Use the size() method
Call the length() method
Call toByteArray().length
It is not possible
Which of the following statements is true about the reflection API?
There is a sizable performance overhead for using it
Only native methods may be used with reflection
It will circumvent any security policy at runtime so it must be used carefully
It cannot be used to alter member variable access visibility
A constructor is used for:
Incremental garbage collection
Lazy loading of runtime resources
Importing classes and to declare thread-local variables
Initialization of a newly created object
What is the purpose of import statements?
To declare global variables
To define 'friendly' classes
To assist the compiler in making optimizations
To allow the code to refer to classes without a formal prefix
When a JSP is compiled it becomes a:
JSPC
Stub class
Servlet
WAR or EAR deployment
A collection of methods with no implementation is called:
an interface
native linking
a subclass
data encapsulation
The transient keyword is used when a variable should not be written out when a class is serialized.
True
False
Which of the following is the most restrictive access modifier:
public
private
protected
final
Java is considered to be a platform-independent language because:
it is compiled into machine specific byte-codes
a compiler has been written for it on all platforms
it is object-oriented, like C++
it is an interpreted language which is run in a virtual machine
The difference between a method in a JavaBean and other methods is:
There is no difference, they are still just methods
Methods in a JavaBean must be declared final
Other methods must always be declared private
JavaBeans methods take up less space
If you need to store a "map" of objects in a multi-threaded environment you should use java.util.HashMap.
True
False
Comments
Anyone preparing for a Java certification must practice mock exams.
Java Certification Examgot 500+ practice questions with exam simulator.
Javacertificationexam
True Or False Questions Java
Java Tests And Quizs
Exam Question For Reflection In Java
Java Certification Questions(string)
Java Certification
Quiz Questions On Reflection In Java
Tests And Exam On Java Programming
Java 5 Certification Test
Recently Authored
|