CSC 2000 Computer Programming Final Exam

An array is a data structure that stores a collection of elements of the same data type in contiguous memory locations.

public: This keyword means that the main method is accessible from anywhere in the program.
static: This keyword means the main method is associated with the class itself, not with any particular object of the class. This allows the method to be called without creating an object of the class. void: This keyword means the main method does not return any value. main: This is the name of the method. It is a special method that is the entry point for every Java program. The Java Virtual Machine (JVM) executes the code inside the main method first when it runs a Java program. (String args[]): This is the parameter list for the main method. It takes an array of strings as input. This array contains any command-line arguments that are passed to the Java program when it is executed.

Java achieves platform independence through its bytecode compilation mechanism. It compiles source code (.java) into bytecode (.class), which is platform-independent and can be run on any system that has a Java Virtual Machine (JVM).

<p>Java is known for several characteristics, including:</p> <ol> <li> <strong>Object-oriented:</strong> Java is built on the concept of objects, which are self-contained components that encapsulate data and behavior.</li> <li> <strong>Platform-independent:</strong> As mentioned earlier, Java achieves platform independence through its bytecode compilation, allowing programs to run on various operating systems without modification.</li> <li> <strong>Secure:</strong> Java's security features help prevent malicious code from accessing sensitive system resources.</li> <li> <strong>Robust:</strong> Java's strong type checking, exception-handling mechanisms, and garbage collection contribute to creating robust and reliable code.</li> </ol> Signup and view all the answers

<p>The four access modifiers in Java are:</p> <ol> <li> <strong><code>public</code>:</strong> Members declared with <code>public</code> access are accessible from anywhere in the program.</li> <li> <strong><code>private</code>:</strong> Members declared with <code>private</code> access are only accessible within the same class.</li> <li> <strong><code>protected</code>:</strong> Members declared with <code>protected</code> access are accessible within the same package or subclasses of the class.</li> <li> <strong><code>default</code> (package private):</strong> Members declared with <code>default</code> access (or no explicit modifier) are accessible only within the same package.</li> </ol> Signup and view all the answers