Java tricky interview questions and answers pdf
Java Interview Questions and Answers | Java QuestionsWhen discussing preparation for a Java programming interview, the focus is typically on the interviewee. Candidates want to know what types of questions to expect so that they can best prepare. Yet the point at issue remains — what type of java interview questions does an employer ask potential candidates in order to best evaluate their skills? In a software development house, regardless of whether the java programming language or even object oriented programming is standard, coming up with programming questions and answers is straightforward. It is easy to employ Google, for example, to search for language syntax to help with writing the core java interview.
37 Java Interview Questions and Answers
I want to persist data of objects for later use. Anonymous October 12, at AM. Here's what you need to know. Hibernate framework provide option to map plain old java objects to traditional database tables with the use of JPA annotations as well as XML based configuration.Singleton class is a class whose questilns one instance can be created at any given time, in one JVM. Why Java Strings are immutable in nature. The second way to create a thread is to extend the Thread class. Ans: An Inner class is a class which is nested within another class.
Used to call the default constructor of the same class. In simpler terms, an empty interface is called the Marker interface. Read More? What is a Switch Case In Java.
Programming Questions and Answers
ConcurrentHashMap is thread-safe; that is the code can be accessed by queztions thread at a time while HashMap is not thread-safe. Ans: When a method or a variable is declared with Protected access specifier, it becomes accessible in the same class,any other class of the same package as well as a sub-class. It is can be called like any general method 3. What is the concept of String Pool in java. The interface is not instantiated - it is implemented.
Great questions, How about adding tricky questions related to programming exercise? One of the most tricky questions, I have face in a Java interview was, Does two object will always be equal, when there compareTo method returns zero? I said, Yes, but that was not true. Though most of the classes will be equal if there compareTo return true e. String, but it's not mandatory.
Yes we can have multiple catch blocks under single try block but the approach should be from specific to general. It stands for Java Development Kit. Vector is synchronized! Anonymous September 12, at AM.
I am also a Java Programmer from india. Ans: Although String and StringBuffer both represent String objects, we get an error. Is it possible to define a method in Java class but provide it's implementation in the code of another language like C. Processes can only exercise control over child processes.Must Learn. Any change in the main thread may affect the behavior of the other threads of the process. Facebook Twitter Linkedin Youtube Instagram. Can main method in Java can return any data.
Both classes are in the same package. This is one more reason why answets should use instanceof instead of getClass while overriding equals mehtod, otherwise equals will return false even if object are same but classloader is different. It must have the same name as that of the class. Programming is often about the logic, as opposed to the syntax.