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A file containing the keys and certificates used for authentication. What is life cycle (J2EE component)

The framework events of a J2EE component's existence. Each type of component has defining events that mark its transition into states in which it has varying availability for use. For example, a servlet is created and has its init method called by its container before invocation of its service method by clients or other servlets that require its functionality. After the call of its init method, it has the data and readiness for its intended use. The servlet's destroy method is called by its container before the ending of its existence so that processing associated with winding up can be done and resources can be released. The init and destroy methods in this example are callback methods. Similar considerations apply to the life cycle of all J2EE component types: enterprise beans, Web components (servlets or JSP pages), applets, and application clients.

Alternate Mark Inversion. Line-code type used on T1 and E1 circuits. In AMI, zeros are represented by 01 during each bit cell, and ones are represented by 11 or 00, alternately, during each bit cell. AMI requires that the sending device maintain ones density. Ones density is not maintained independent of the data stream. Sometimes called binary coded alternate mark inversion. Compare with B8ZS.

Stack and heap are memory sections of the .net application. The CLR(Common Language Runtime) is in charge of managing those sections. Value type variables are stored in the stack where storing order is Last in first out. When a variable is out of scope it basically fall off the stack. Reference type variable are stored on the heap where storing order is First in first out. When a variable becomes out of scope it is mark for collection. The GC(Garbage Collector) is the part of the CLR responsible for cleaning up the heap releasing resources occupied by Reference type variables.