Articles & Tutorial for SCWCD certification
All articles for SCWCD certification
Tips and How Tos for SCWCD certification
String Handling
in SCWCD
The String class is defined in the java.lang package and hence is implicitly available to all the programs in Java. The String class is declared as final, which means that it cannot be subclassed. It extends the Object class and implements the Serializable, Comparable, and CharSequence...
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A Closer Look at Methods
in SCWCD
A method is a set of statements grouped together to perform a specific task. It is written to define the behavior of an object or a class. In object-oriented programming, a behavior is referred to as a message that one object sends to another object. Behavior is the only way by which an object...
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Arrays
in SCWCD
Introduction
An array is a fixed length data structure that stores multiple values of the same data type. A Java array is a collection of primitive types, object references, or references to other arrays. An individual value stored in an array is called an element of array. An array can...
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Authentication
in SCWCD
Authentication is the process of verifying the identity of a user. This is usually done using a user name and a password. This process compares the provided user name and password with those stored in the database of an authentication server.
There are four types of authentication as follows:...
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Constructors
in SCWCD
A constructor is a special kind of method that is written as a part of a class. It provides a convenient way to initialize a newly created object at the time of its creation. Once a constructor is defined for a class, it is called automatically immediately after the creation of a new object,...
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Control Statements in Java
in SCWCD
A program is a group of statements that are executed to achieve a predetermined task. Statements in a program are generally executed in a sequential manner, which is called sequential execution or sequential control flow. However, by putting the decision-making statement in the program, the...
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Differentiate between pageContext.include and jsp:include?
in SCWCD
The <jsp:include> standard action and the pageContext.include() method are both used to include resources at runtime. However, the pageContext.include() method always flushes the output of the current page before including the other components, whereas <jsp:include> flushes the output...
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Everything you want to know about the CX310-081 exam
in SCWCD
Q. What are the prerequisites for the SCWCD 1.4 exam?
A. Before taking the SCWCD 1.4 exam, you must first pass the Sun Certified Java Programmer exam (CX310-025 or CX310-035 or CX310-055 or CX310-065).
Q. How should I prepare for the exam?
A. To prepare for the exam, you...
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How are packages declared?
in SCWCD
Packages are declared by using the package statement. The word package is a keyword in Java. The package statement is not technically needed to write a complete Java program. However, if it appears, it must be the first executable statement in the program. Only comments or white spaces are...
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How can an existing session be invalidated?
in SCWCD
An existing session can be invalidated in the following two ways: Setting timeout in the deployment descriptor : This can be done by specifying timeout between the <session-timeout> tags as follows:
<session-config>...
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