cs211 review

• the public modifier is applicable to interfaces, classes, records, fields, and methods
• public modifier means accessible from any other class or package
• private modifier is applicable to classes, fields, and methods
• private modifier means accessible only within the defining class
• protected modifier is applicable to classes, fields, and methods
• protected modifier means accessible within the same package or by subclasses even if they are in different classes
• public static is applicable to interfaces, fields, and methods
• public static means accessible from any class, but no instance is needed and is shared across all instances
• public final is applicable to classes, fields, and methods
• public final means cannot be overridden or changed after the initial assignment and accessible from any class
• public abstract is applicable to interfaces, classes, and methods
• public abstract means must be implemented by subclasses, and cannot instantiate directly and has no implementation in the class itself
• private static is applicable to classes, fields, and method
• private static means accessible only within the class and is shared across all instances of the class
• private final is applicable to classes, fields, and methods
• protected static is applicable to classes, fields, and methods
• protected static means accessible within the same package or by subclasses, shared across all instances
• true or false: interface fields are public static by default?

  true
• protected final is applicable to classes, fields, and methods
• protected final means cannot be overridden and is accessible within the same package or by subclasses
• protected abstract is applicable to methods
• protected abstract means must be implemented by any subclass and is accessible within the same package or by subclass
• public static final is applicable to classes, fields, and methods
• public static final represents a global constant that is accessible from anywhere, only one instance exists, and it cannot be changed after assignment
• private static final is applicable to classes, fields, and methods
• private static final represents a private constant meaning it is only accessible within the class and cannot be changed after assignment, and. is shared across all instances of the class
• the static modifier means that there is only one copy of the variable for all class instances. static methods do not need an instance reference to be called
• final variables can never change value once assigned
• an interface has no structure and only behaviors
• abstract classes have structures and behaviors
• primitive types have no behaviors and only structure
• a class describes a collection of object with similar responsibilities
• the new keyword is used to create an instance of a class
• the void keyword specifies that a method does not return any value
• null is a value that shows that an object is referring to nothing
• integer underflow (Integer.MIN_VALUE - 1) causes java to wrap around to the MAX value and continue from there
• integer overflow causes java to wrap around to the MIN value and continue from there (Integer.MAX_VALUE + 1)
• the primitive type boolean cannot hold a null value (true or false): true
• the wrapper class Boolean cannot hold a null value in addition to true or false (true or false): false
• inheritance is the design mechanism in oop that establishes shared behaviors among classes through a hierarchical relationship (an abstraction that allows objects to share behaviors and be treated polymorphically)