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Core Java - Interview Questions and Answers for 'Class loaders' - 5 question(s) found - Order By Newest

Advanced level question. Recently asked in few Indian service companies ( Based on 3 inputs )
 Q1. What are various types of Class loaders used by JVM ?Core Java
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Ans. Bootstrap - Loads JDK internal classes, java.* packages.

Extensions - Loads jar files from JDK extensions directory - usually lib/ext directory of the JRE

System - Loads classes from system classpath.

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   Like         Discuss         Correct / Improve     java   jvm   memory management   class loaders   bootstrap   extensions   system  classloaders   advanced   technical lead   technical architect     Asked in 7 Companies


 Q2. What is a class loader ? What are the different class loaders used by JVM ?Core Java
Anonymous
Ans. Part of JVM which is used to load classes and interfaces.

Bootstrap , Extension and System are the class loaders used by JVM.

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   Like         Discuss         Correct / Improve     java   class loaders  classloaders   jvm   java memory management   advanced     Asked in 3 Companies


 Q3. How are classes loaded by JVM ?Core Java
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Ans. Class loaders are hierarchical. The very first class is specially loaded with the help of static main() method declared in your class. All the subsequently loaded classes are loaded by the classes, which are already loaded and running.

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   Like         Discuss         Correct / Improve     java   jvm   memory management   class loaders  classloaders     Asked in 1 Companies


 Q4. Difference between static vs. dynamic class loading?Core Java
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Ans. static loading - Classes are statically loaded with Java new operator.

dynamic class loading - Dynamic loading is a technique for programmatically invoking the functions of a class loader at run time.

Class.forName (Test className);

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   Like         Discuss         Correct / Improve     java   jvm   memory management   class loaders  classloaders   static class loading   static loading   dynamic class loading   dynamic loading     Asked in 2 Companies      expert        frequent


 Q5. Difference between loadClass and Class.forName ?
Anonymous
Ans. loadClass only loads the class but doesn't initialize the object whereas Class.forName initialize the object after loading it.

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   Like         Discuss         Correct / Improve     java   class loaders   jvm   advanced




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