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What is Externalizable interface?
Externalizable is an interface which have two methods readExternal and writeExternal. These methods give you a control over the serialization mechanism.
Therefore if your class executes this interface, you can customize the serialization process by executing these methods.
Difference between HashMap and Hash table HashMap: It allow us to have null values and also one null key It is Unsynchronized. Iterator in HashMap is Fail-Safe.
what is the use of design pattern in java ?
What is meant by semantic error? Occur while a statement executes and has an effect not intended through the programmer and Frequently times occur only in unusual & infrequent
What is JDBC exactly? Describe the steps required to execute a SQL query using JDBC.
How can you describe a consistent web design? Why is it required? A consistent web design is Easy understandable, not along with heavy graphics, easy navigation. It is required
Write a brief note on each of the following. FTP Telnet Instant messaging VoIP FTP: File Transfer Protocol: This protocol is used to upload and download the
Write names of the DoS attack's phases? DoS (Denail of service): DoS attach has in total 3 kinds of phases and below they are listed: 1. Search 2. Arm 3. Attack
Suppose that: A is the set of characters in the string "pellet"; B is the set of characters in the string "teller"; C is the set of characters in the string "pertinent"; a
1.) Write an application with two user transactions (login which includes viewAllStudents and viewStudent ) with full MVC architecture that displays the details of the selected
In Exercise 1 you were asked to modify the Sorts program so that it would output the number of swaps used by a sorting method. It is a little more difficult to have the program als
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