Java and jsp interview questions. 300 Core Java Interview Questions

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Top 10 JSP Interview Questions Answers for Java Programmer

java and jsp interview questions

What are the types of Session Tracking? The servlet container does not encode the binary data, it sends the raw data as it is. Compile Time Error 61 What is aggregation? It is useful to modularize the web application. The following declaration is not thread safe: because these are declarations, and will only be evaluated once when the page is loaded The following declaration is thread safe: because the variables declared inside the scriplets have the local scope and not shared. However, there is only one parameterized constructor in the class Test. In Java, if we make the abstract methods static, It will become the part of the class, and we can directly call it which is unnecessary. Like You cannot use a semicolon to end an expression. This extra round trip a redirect is slower than forward.

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Top 10 Servlet Interview Question Answers

java and jsp interview questions

No, the constructor can't be final. Any trademarked names or labels used in this blog remain the property of their respective trademark owners. Aggregation can be defined as the relationship between two classes where the aggregate class contains a reference to the class it owns. The answer is, hash code is calculated for a key by calling Hashcode method. What is difference between final, finally and finalize in Java? Custom actions helps recurring tasks will be handled more easily they can be reused across more than one application and increase productivity.

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Top 40 Popular J2EE Interview Questions and Answers

java and jsp interview questions

Anonymous, you cannot stop a Servlet manually, at most you can undeploy the application. It allows Null values but not duplicate values. Ans Following steps are associated with servlet life cycle. Interfaces are slow as it requires extra indirection to find corresponding method in the actual class. Define Expression Expression tag is used to insert Java values directly in the output. We at tutorialspoint wish you best luck to have a good interviewer and all the very best for your future endeavor. You can refer for more details What is CountDownLatch in java? PrintWriter is the actual object responsible for writing the content in response.

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Top 50 Servlet Interview Questions & Answers

java and jsp interview questions

The config object is an instantiation of javax. Q 17 Define the Collection types in Hibernate? This will be very helpful for the technical people to prepare for the interview very quickly. The changed content is not included in the output. This is to increase the portability of the application. It was designed with a goal of being easy to use and accessible to a broader audience. It is a sub-element of property group.

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Java, JDBC, JSP, and Servlet Interview Questions Flashcards

java and jsp interview questions

This way, the inclusion is performed just once during the translation phase. When you want to make any modification in jsp so without restarting the server you can see the changes whatever you make but in case of servlet you need to recompile the servlet class. . The idea behind inheritance in Java is that you can create new classes that are built upon existing classes. It first searches for an existing object utilizing the id and scope variables.

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Top 10 Servlet Interview Question Answers

java and jsp interview questions

Collection of Large Number of Java Interview Questions! A servlet container which does not initialize at the start up, this is known as servlet lazy loading. We can use the errorPage attribute of the page directive to have uncaught run-time exceptions automatically forwarded to an error processing page. When an object contains the other object, if the contained object cannot exist without the existence of container object, then it is called composition. Containers hold set of objects. The Object is the real-time entity having some state and behavior.

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Top 50 Servlet Interview Questions & Answers

java and jsp interview questions

The object class is the superclass of all other classes in Java. Q 31 Is that Servlet is pure java object or not? No, you can't override the static method because they are the part of the class, not the object. The C class inherits A and B classes. If there is a request from the client, servlet container decides on which application it needs to map. This tag is used to create an instance of java bean, first of all, it tries to find out the bean if bean instance already exists assign stores a reference to it in the variable. Therefore, in this case, The Person class constructor is called first and then the Employee class constructor is called. Java uses compiler and interpreter both.

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Java interview questions

java and jsp interview questions

The page and the encoded information are separated by the? A scriptlet contains any language statements, variables, expressions that can be valid in the page scripting language. No, because this and super must be the first statement in the class constructor. If you do so, it will throw IllegalMonitorStateException. This happens because, when a page is included statically, entire code of included page becomes part of the new page. There are the following features of the object-oriented paradigm.

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Java, JDBC, JSP, and Servlet Interview Questions Flashcards

java and jsp interview questions

What does the WebContent Contains? It is a software development environment which is used to develop Java applications and applets. The Bean exists across the entire session, and any page that participates in the session can use it. Now, their sum 30 is treated as the string and concatenated with the string Javatpoint. Yes, we can have any number of main methods in a Java program by using method overloading. Has run time performance overhead. We can use this keyword to perform constructor chaining within the same class.

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