I was rejected twice in visa at hyderabad consulate.I am not understanding where is the problem. IN

I was rejected twice in visa at hyderabad consulate.I am not understanding where is the problem.
IN MY FIRST ATTEMPT
Me:good morning
Vo:good mrng
The questions they asked me was:

1:which year passed out?

A;2017

2:what is your UG percentage

A:8.54CGPA

3.what is your specialization

A. I want to do specialization in database systems.And there are lot of career opportunities in india for me after doing this Masters

4:diff types of databases

A:mysql and oracle databases

5:which one you like

A:i like mysql.......

6:which book you read recently

A: i am suddenly blank i donot now what to say

I tell apj abdul kalam ....

The consulate officer said sorry

IN THE SECOND ATTEMPT
1.why this university
A;told
2.how many did you apply
A:i applied for four universities tamuk,uhcl,wiu,OKlahoma university
3.;UG passed out year
A;2017
4:percentage
A;8.54 CGPA
5;Do you have any backlogs
A:no I donot have any backlogs
6.:have you come for visa interview last time
A;yes

The consulate officer said sorry

I would like to know where is my mistake and how i will improve that so please suggest me