A virus, at its most basic definition from Ucertify, is one of the most popular forms of malicious software around. Malicious software is also known as malware. A virus program will infiltrate the operating system of your PC in order to wreak havoc from within your software programs.

The SCJP Exam is an accreditation exam that tests the knowledge and skills of examinees about the Java programming language. Java is used to create the software system itself, particularly for networks like those in small businesses and large enterprises. This is why the Java security system is so important for an SCJP examinee to learn, so that he can assure the security of the software solutions he will create.

A Java-based network can be threatened by hostile programs like malware or viruses which could be downloaded deliberately or accidentally by the users of the Java-based network from Internet websites as these end users go about their work. The Java security model uses the sandbox concept to protect the other parts of network from infiltration.

The Java security sandbox allows end users to download even dubious programs safely without risking the integrity of the entire network. These dubious programs can only operate from within the confines of the network sandbox which allows the other parts of the network to stay relatively insulated from the contents of the sandbox.

Fortunately for client companies, a competent SCJP accredited programmer can customize the Java-based sandbox so that at no point within the sandbox can the malware or virus find a weak point so that it can sneak out and threaten the whole network. The SCJP IT personnel need to understand how the Java API, the security manager, the class file verifier, the class loader architecture, and the safety aspects of the Java language and Java virtual machine work together to guarantee network security.

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