In the context of Java,  the transient keyword is used as field modifier. If we declare a field as transient; that field  would not be serialized even if the class implements Serializable. private transient int count; In Java, transient is used only for fields, so methods, classes and interfaces can not be declared as transient.

Checked Exceptions are subclasses of java.lang.Exception need to be declared in a method or constructor's throws clause Unchecked Exceptions are subclasses of java.lang.RuntimeException do not need to be declared in a method or constructor's throws clause In the context of common transaction APIs, such as JTA or Spring transaction APIs; any   RuntimeException  triggers rollback, and any checked Exception does not rollback the transaction. R un time R ollback Un checked