Java/J2EE Job Interview Companion by Arulkumaran Kumaraswamipillai

By Arulkumaran Kumaraswamipillai

Four hundred+ Java/J2EE Interview questions with transparent and concise solutions for: task seekers (junior/senior builders, architects, team/technical leads), advertising seekers, pro-active freshmen and interviewers. Lulu best a hundred top vendor. elevate your incomes capability via studying, making use of and succeeding. study the basics when it comes to Java/J2EE in a simple to appreciate questions and solutions method. Covers four hundred+ well known interview Q&A with plenty of diagrams, examples, code snippets, move referencing and comparisons. this isn't in basic terms an interview consultant but additionally a brief reference advisor, a refresher fabric and a roadmap masking a variety of Java/J2EE comparable themes. extra Java J2EE interview questions and solutions & resume assets at

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The flattened car object sits in the file system for some time. Meanwhile, if the “Car” class is modified by adding a new field. e. InvalidClassException – because all serializable classes are automatically given a unique identifier. This exception is thrown when the identifier of the class is not equal to the identifier of the flattened object. If you really think about it, the exception is thrown because of the addition of the new field. You can avoid this exception being thrown by controlling the versioning yourself by declaring an explicit serialVersionUID.

E. separate Java - Fundamentals 41 JVM). Hence inter-process communication involves calling method passing objects as arguments to called method by-value in a serialized form, which can adversely affect performance due to marshaling and unmarshaling cost. x introduced local interfaces, where enterprise beans that can be used locally within the same JVM using Java’s form of pass-by-reference, hence improving performance. Q 23: What is serialization? How would you exclude a field of a class from serialization or what is a transient variable?

There will be two keys with “Sam” in positions with hash // values 345678965 and 76854676. get(new UserKey(“John”)); // key cannot be accessed. String class as the key, which are immutable Java objects. e. do not provide any setXXX() methods in your key class. g. no setName(…) method in the UserKey class). e. cannot mutate the existing key because immutable key object class has no setter methods). put(key2, “Melbourne”); //Since UserKey is immutable, new instance is created. g. HashSet) as well.

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