serialization in java interview questions

. The Array does not provide as many functions as ArrayList, such as AddAll, RemoveAll, and iterator. Although ArrayList is obviously a better choice, there are times when arrays are useful, such as the following three scenarios.(1) If the size of the list has been specified, most of the cases are stored and traversed.(2) for traversing the base data type, although collections uses auto-boxing to alleviate the encoding task, working on a list of basic types of a specified size can also become sl

. The object of death is the object that the app is inaccessible and has not been reclaimed by the garbage collector. Until the garbage collector reclaims these objects, they will occupy the heap memory space.40. What is the difference between a serial (serial) collector and a throughput (throughput) collector?The throughput collector uses a parallel version of the new generation garbage collector, which is used for medium-sized and large-scale data applications. The serial collector is sufficie

network to another host or persist it to storage, it must convert the Object's representation in memory into the appropriate format. This process is called marshalling, and vice versa is Demarshalling.90. explain the following serialization and Deserialization.Java provides a mechanism called object serialization, which represents the object as a series of bytes containing the Object's data, the type infor

The Java Collection framework is the foundation of the Java programming language and is an important knowledge point in the Java interview. Here, I've listed some important questions and answers about the Java collection.In addition, the Code of the rural network before also

The Java Collection framework is the foundation of the Java programming language and is an important knowledge point in the Java interview. Here, I've listed some important questions and answers about the Java collection.In addition, the Code of the rural network before also

implementing polymorphism is called dynamic binding, which is the actual type of the referenced object that is judged during execution, and its corresponding method is called according to its actual type.The role of polymorphism: to eliminate the coupling relationship between types.Session mechanism?Reference: http://justsee.iteye.com/blog/1570652What is the serialization and deserialization of Java? Why d

Java Collection related interview questions and answers Interview questions1.JavaWhat is a collection frame? What are some of the advantages of a collection framework? There are collections in each programming language, and the original Java version contains several collection classes: Vector, Stack, Hashtable, and array. With the extensive use of the collection

() method of the DriverManager classEstablish a connection statement with the data source as:Connection con = drivermanager.getconnection ("Jdbc:odbc:news");"N ews" in a URL connection means (C) (select an item)A) name of the table in the databaseB) The machine name of the database serverC) name of the data sourceD) User name36. In Java, JDBCAPI defines a set of interfaces and classes that are used to communicate with the database, which are included

, which allows any type of key and value object, and allows NULL to be used as a key or value35. When developing a JDBC application in Java, use the getconnection () method of the DriverManager classEstablish a connection statement with the data source as:Connection con = drivermanager.getconnection ("Jdbc:odbc:news");"N ews" in a URL connection means (C) (select an item)A) name of the table in the databaseB) The machine name of the database serverC)

how to clone or serialize it, or whether it can be cloned or serialized.Authorizing cloning and serialization in all implementations ultimately leads to less flexibility and more restrictions. A particular implementation should determine whether it can be cloned and serialized.5. Why does the map interface not inherit the collection interface?Although the map interface and its implementation are part of the collection framework, the map is not a coll

how to clone or serialize it, or whether it can be cloned or serialized.Authorizing cloning and serialization in all implementations ultimately leads to less flexibility and more restrictions. A particular implementation should determine whether it can be cloned and serialized.5. Why does the map interface not inherit the collection interface?Although the map interface and its implementation are part of the collection framework, the map is not a coll

to Wangwei"$ Java-jar Blockchain-java-jar-with-dependencies.jar-add "Send 3.5 BTC to Wangwei"Print Blockchain$ Java-jar Blockchain-java-jar-with-dependencies.jar-printSummarizeIn this article we implement the Blockchain storage function, next we will implement the address, transaction, wallet, some of the functions of

transmitted data and send packet data to the target computer or network. Transport layer mainly makes the network program communicate, in the network communication, can adopt the TCP protocol, also can adopt the UDP protocol. The application layer is responsible for the protocol of the application, such as HTTP protocol, FTP protocol, etc.20. Describe your understanding of IP address. To enable computers in your network to communicate, you must specify an identification number for each computer

decide how to clone or serialize it, or whether it can be cloned or serialized.Authorizing cloning and serialization in all implementations ultimately leads to less flexibility and more restrictions. A particular implementation should determine whether it can be cloned and serialized.5. Why does the map interface not inherit the collection interface? Although the map interface and its implementation are part of the collection framework, the map is no

decide how to clone or serialize it, or whether it can be cloned or serialized.Authorizing cloning and serialization in all implementations ultimately leads to less flexibility and more restrictions. A particular implementation should determine whether it can be cloned and serialized.5. Why does the map interface not inherit the collection interface? Although the map interface and its implementation are part of the collection framework, the map is no

corresponding action, while the user's data to fill the corresponding actionform, and then the Actionform is distributed to action for processing.3.Action automatically calls the Excute method, in which the action takes the user-filled data from the Actionform and invokes the model (JavaBean) for processing, and then displays the results of the processing in a different view (JSP page)struts-config.xml:struts 's configuration file .It says that each user's request is handled and forwarded throu

how to clone or serialize it, or whether it can be cloned or serialized.Authorizing cloning and serialization in all implementations ultimately leads to less flexibility and more restrictions. A particular implementation should determine whether it can be cloned and serialized.5. Why does the map interface not inherit the collection interface?Although the map interface and its implementation are part of the collection framework, the map is not a coll

client invokes an EJB instance business method. If the corresponding EJB object finds itself not bound to the corresponding bean instance, it activates the Bean store (through the serialization mechanism storage instance) to reply (activate) This instance. The corresponding ejbactive and Ejbpassivate methods are called before the state changes.78, several types of EJBSession bean, Entity bean message-driven (msg driven) beanThe session bean can also

Tag: equals the capacity to manipulate it strong index readability what actorWhat are the basic interfaces of the 1.Java collection class framework?The collection class interface specifies a set of objects called elements. Each specific implementation class of the collection class interface can optionally save and sort the elements in its own way. Some collection classes allow duplicate keys, some are not allowed.The

into the corresponding method to invoke the logical layer of the method to achieve response to the customer.There are no doget, dopost, and so on in the Servlet interface and Genericservlet, these methods are defined in HttpServlet, but all return error information, so, each time we define a servlet, Must implement these methods such as Doget or Dopost.Each custom servlet must implement the Servlet interface, and the Servlet interface defines five methods, of which the more important three meth