Frage im Vorstellungsgespräch bei Sparken IT Solutions

Ifor first Hr round, they only asked how much you rate yourself in mysql, java, JavaScript, why? In second round basic insert update, delete, select commands question, then string or numbers basic code, JavaScript regex, core java, like multithreading, string, In third round ask questions on having clause, index, group by and write html table, what is difference between td and th, associate array iterate