JAVA ArrayList vs Vector What is serialization Inheritance Polymorphism Abstraction Interface JVM, JDK, JRE Jvm - is a virtual machine, present in h/w or s/w. Jvm helps to execute java code in our device. Jvm - load code, verifies code, executes code, provides RTE. Jre - jvm + set of libraries, which helps to run the code. Jdk - jre + development tools - such as debugger, compiler, and executor. So jdk helps us to develop java applications. JVM memory String why immutable String buffer vs String builder Application super class What is the superclass of all exception classes in java - The Throwable class is the superclass of all Java exceptions and errors. What is the superclass of all application classes in java - The Object class , which is stored in the java. lang package, is the ultimate superclass of all Java classes (except for Object ) What is iterator ANDROID Difference between RelativeLayout and LinearLayout Explain activity lifecycle ...
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