What is Java serialization?      The basic idea behind java serialization are Save everything to a stream  java.io defines two serialization streams. ObjectOutputStream for saving ObjectInputStream for restoring Create the stream and tell it “save this object” using a standard API Serialization allows us to read and write whole object from i/p stream and o/p stream respectively. Why serialization? Persistence storing objects in files and databases Marshalling...

Generics is a java feature introduced as part of Java 1.5. It ensures Type safety(provides type checking during java compile time) Code reusability   Removes the possibility of classCastException during runtime. Any generic java type(Class, interface etc) and methods are basically datatypes and functions which are strictly parameterized over a data type respectively. Since Java 5 whole collection classes are rewritten using generics to ensure type safety. Pre...

Datascience vs Machine learning Data science is all about making use of existing data to better understand a behavior, a phenomenon or to predict future insights. As you can see in the picture, data science requires a variant set of skills that collectively contribute to the ultimate goal: making use of data. Machine learning is the part that requires math/statistics knowledge and the skills to code those algorithms to build...

Hashmap is used mainly to store key-value pairs. The purpose of a map is to store items based on a key that can be used to retrieve/delete the item at a later point. Similar functionality can only be achieved with a list in the limited case where the key happens to be the position in the list. When you add items to a HashMap, you are not guaranteed to retrieve...

There are many ways to implement threading, but most modern programming language implementations generally use the operating system kernel's threading capabilities. For the language developer, it's left up to a library call into the kernel. Within the kernel, threading essentially comes down to an interrupt. The program is loaded into memory and the CPU's instruction pointer set to the current memory location, which causes the CPU to start...

what is thread in java A thread is an independent path of execution within a program. Many threads can run concurrently within a program. Every thread in Java is a the java.lang.Thread.  A thread can be in one of the five states. According to sun, there is only 4 states in thread life cycle in java new, runnable, non-runnable and terminated. There is no running state.But for better understanding the threads, we are explaining it in the...