BASIC INTERVIEW QUESTIONS IN JAVA
What is JDK?
JDK stands for Java development kit.
It can compile, document, and package Java programs.
It contains both JRE and development tools.
What is JVM?
JVM stands for Java virtual machine.
It is an abstract machine that provides a run-time environment that allows
programmers to execute Java bytecode.
JVM follows specification, implementation, and runtime instance notations.
What is JRE?
JRE stands for Java runtime environment.
JRE refers to a runtime environment that allows programmers to execute Java
bytecode.
JRE is a physical implementation of the JVM.
In Java, what are the differences between heap and stack memory?
Memory
Stack memory is used only by one thread of execution.
All the parts of the application use heap memory.
Access
&Other threads can’t access stack memory.
&Objects stored in the heap are globally accessible.
Memory Management
Stack follows the LIFO manner to free memory.
Memory management for heap stems from the generation associated with each object.
Lifetime
Stack exists until the end of the execution of the thread.
Heap memory lives from the start till the end of application execution.
