Hello Pratap,
The source you mentioned is
not a good source for mock exams. In fact, it is a website that contains illegally copied questions from the real exam. Using those questions means that you're engaging in an illegal activity, and it also means you are cheating the exam - you're only learning the questions and answers by heart, and your SCJP will not prove you know anything about Java if you do that.
Please do not use that source. There are plenty of legitimate mock exams available, see the list in the
SCJP FAQ.