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added: Wed, 23rd August 2006 | 460 views | 1x in favourites
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Complete java interview questions library
Java Basics 1.The Java interpreter is used for the execution of the source code. True False Ans: a. 2) On successful compilation a file with the class extension is created. a) True b) False Ans: a. 3) The Java source code can be created ...
Java does not support multiple inheritances because it causes more problems than it solves. Instead Java supports multiple interface inheritance, which allows an object to inherit many method signatures from different interfaces with ...
Separate HTML code from the Java code: Combining HTML and Java code in the same source code can make the code less readable. Mixing HTML and scriplet will make the code extremely difficult to read and maintain. The display or behaviour ...
Acronym for Java Virtual Machine. An abstract computing machine, or virtual machine, JVM is a platform-independent execution environment that converts Java bytecode into machine language and executes it. ...
A Java application can have multiple connections to multiple data sources at the same time using multiple Connection objects. A Connection object can be obtained by a Java application in two ways: through a DriverManager class or ...
Private constructor is used if you do not want other classes to instantiate the object. The instantiation is done by a public static method within the same class. 1. Used in the singleton pattern. (Refer Q45 in Java section). ...
Should not be used to release non-memory resources like file handles, sockets, database connections etc because Java has only a finite number of these resources and you do not know when the garbage collection is going to kick in to ...
What are some of the best practices relating to Java collection? 1. Use ArrayLists, HashMap etc as opposed to Vector, Hashtable etc, where possible to avoid any synchronization overhead. Even better is to use just arrays where possible. ...
An object is marked serializable by implementing the java.io.Serializable interface, which is only a marker interface -- it simply allows the serialization mechanism to verify that the class can be persisted, typically to a file. ...
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