Untitled Quiz

Defining multiple methods with the same name but different parameters (e.g., different data types or number of arguments).

Executing a method's code by providing its name and any necessary arguments.

Returns the remainder of a division operation. (e.g., 5 % 2 = 1 because the remainder after dividing 5 by 2 is 1.)

Operators that increase or decrease the value of a variable by 1. (e.g., ++, --)

Operators that combine an arithmetic operation with assignment. (e.g., +=, -=, *=, /=, %=)

The static keyword makes the main method accessible without creating an object of the class. This is because main is the entry point for the Java Virtual Machine.

The %f format specifier is used in printf or System.out.printf to output float or double values with a fixed number of decimal places.

The || (OR) operator returns true if at least one condition is true, and the && (AND) operator returns true only if both conditions are true.

A shorthand way to write an if-else statement in one line. It evaluates a condition and returns one of two values based on the result.

To exchange the contents of two arrays, element by element.

A field that belongs to the class itself, not individual objects. There's only one copy shared by all instances.

A built-in method that returns a string representation of an object when you want to display it.

A reference to the current object within its own class, used to distinguish between fields and parameters.

The ability of an object to take on multiple forms, allowing you to use the same code with different types.

A search algorithm that repeatedly halves the search space, making it much faster than linear search for sorted data.

A simple search algorithm that compares each element in the array to the target value, one by one.

A type of exception that the Java compiler forces the programmer to handle, typically because it indicates a potential problem that the programmer can reasonably anticipate and address. These exceptions must be either caught within the method where they occur or declared in the throws clause of the method signature.

A type of exception that the compiler does not require the programmer to handle explicitly. These exceptions usually indicate programming errors, such as trying to access an array element outside its bounds, or dividing by zero.

The statement used to explicitly throw an exception in your code. It allows you to signal an error condition and potentially interrupt the normal flow of program execution.

The process of reading data from files. Java provides classes like FileInputStream, FileReader, and ObjectInputStream to facilitate this.

The process of writing data to files. Java provides classes like FileOutputStream, FileWriter, and ObjectOutputStream to facilitate this.

A file path that starts from the root directory of the file system. It provides an unambiguous location for a file regardless of the current working directory.

A file path that specifies the location of a file relative to the current working directory. It uses relative references like ./ or ../ to indicate file locations.

A static method used to check if a given path refers to a directory. It returns true if the path is a directory and false otherwise.

A ragged array declaration creates an array where each row can have a different number of columns. The declaration int[][] ragged = new int[5][] creates a ragged array with five rows, but the number of columns in each row is not specified. This allows for flexibility in storing data where the size of each row can vary.

Initializing an array with a value attempts to set every element of the array to that value. However, initializing arrays with a value results in a syntax error. For example, int[] numbers = new int[5] {10} is invalid because the array cannot be initialized with a value directly.

The code snippet int value = min(numbers); uses the built-in min() function to find the lowest value in the numbers array. This assumes that min() is a function that returns the minimum value from an array of integers.

The for loop for (int i = 0; i < names.length; i++) { System.out.println(names[i].length());} is valid because it correctly iterates through each element in the names array and uses the length() method to print the length of the current element. names[i].length() calls the length() method on the String object at index i in the array.

A try block is a code block used to enclose code that might throw an exception. If an exception is thrown within the try block, the program execution immediately transfers to the corresponding catch block.

A catch block is used to handle exceptions thrown within a try block. It provides a way to handle specific types of exceptions that might happen, such as ArithmeticException or IOException. It contains code that will be executed if an exception of a matching type is thrown within the try block.

An uncaught exception is an exception that occurs for which there are no matching catch clauses. This leads to application termination as the program does not have a way to handle the exception.

A throws clause in a method declaration specifies the types of exceptions that the method might throw. It is used to inform the caller of the method about potential exceptions that need to be handled.

The process of converting Java objects into XML format using the Java Architecture for XML Binding (JAXB).

A dialog box that appears on a graphical user interface (GUI) to prompt the user for input, such as text or a choice.

A top-level window in Swing, providing the basic framework for a GUI application.

The process of adding visual elements like labels, buttons, or text fields to a JFrame.

A constant in JFrame that tells the Java Virtual Machine (JVM) to shut down when the window is closed.

The process of setting up event handling involves creating an event handler class, implementing a listener interface, and registering the handler.

When a user presses Enter in a JPasswordField, an ActionEvent is generated.

JRadioButtons within a group are mutually exclusive, meaning only one can be selected at a time.