First Round 1) Difference between array combine and array merge 2) Preg_replace 3) PEAR in php 4) REST VS AJAX 5) REST VS SOAP 6) Second highest salary 7) sort a array with predefined function 8) Create a class and call add and subtract function 9) Mime type 10) Markup language used in rest web API 11) why this error occur header already sent. 12) difference between put and post 13) HTTP method supported by REST 14) Mysam VS Inno Db 15) INNER JOIN VS LEFT JOIN 16) TRAITS 17) FINAL CLASS 18) MAGIC METHOD 19) complex mysql query 20) PUT VS POST 2nd Round 1) how to implement Security in app 2) MYSQL DB question what is layers in mysql , myisam VS innodb , master slave, optomise datbase , datalayers 3) Server commands TOP , one , c