Angaros interview questions

All questions were asked from the CV. The interviewer asked me to rate in all the technologies and based on that he asked some questions. Java - Why do we use printf in Java? PHP - Difference between GET and POST methods. MySQL - Difference between Delete and Truncate. Different types of commands DDL DCL etc JavaScript - Write a Regular Expression to accept all characters only. HTML - Difference between HTML5 and HTML CSS - Tell some classes in PHP. Data Structures - What is Heap Sort. Bootstrap - This question was pretty bad I don't know why he asked that. Screen sizes of Bootsrap the exact sizes. MongoDB - How join happens in MongoDB. DBMS - Left and Right joins.