Technical Interview Questions
The == operator compares two objects to determine if they are the same object in memory. It is possible for two String objects to have the same value, but located indifferent areas of memory. In Java, the == operator compares the references of objects, not their actual content. When you use == to compare two String objects, … Read more
The JDK 1.02 event model uses an event inheritance or bubbling approach. In this model, components are required to handle their own events. If they do not handle a particular event, the event is inherited by (or bubbled up to) the component’s container. The container then either handles the event or it is bubbled up … Read more
A method’s throws clause must declare any checked exceptions that are not caught within the body of the method. In Java, the throws clause in a method signature is used to declare the exceptions that a method might throw during its execution. It specifies the types of exceptions that the method may not handle itself, … Read more
The garbage collector invokes an object’s finalize() method when it detects that the object has become unreachable. In Java, the finalize() method is a method of the Object class, and it is called by the garbage collector before an object is reclaimed (garbage collected). However, there are no guarantees about when the finalize() method will be called … Read more
A field variable is a variable that is declared as a member of a class. A local variable is a variable that is declared local to a method. In Core Java, the main difference between a field variable (also known as an instance variable or member variable) and a local variable lies in their scope … Read more