Prepareation for Java developer

Java, JDk, JRE, JVM, data types, class, Object
What is Java?
Java is object oriented programming,platform independence, open source,secure.

Difference between jDK,JRE, JVM?
Jdk-jdk is provide platforms write the program
JRE- JRE provide platforms to compile and executed program.
JVM-JVM provide platforms line by line executed byte code to machine code convert code.

We are use about to for future action. it tell us that something is going to happen in near future.

He is about to read the newspaper.
We are about to leave for Agra.

Subject+is/am/are+about to+verb1+object+other words

Subject+was/were+about to+verb1+object+other words

Grand mother was about to for a walk.
They were about to go to the park.
2) Over means something above with touch or without touch

The plane flew over our heads.
There is a bridge over the railway track.
There is a fan over my head.

Something is cover other side without touch or with touch this is condition over use.

He put a blanket over the baby.
There is a kitchen over this room.