18-year-old Shubham Srivastava had focused on getting a "good score" in the Joint Entrance Examination (JEE) and securing a seat in IIT Delhi, but he did not expect a perfect 100 score.
Srivastava is the only candidate from Delhi to have secured 100 per cent marks.
When the HRD Ministry's National Testing Agency (NTA) declared the results on Monday, Srivastava found his name among the 24 candidates who got the distinction of a perfect 100.
"Getting a good score and securing admission in IIT Delhi was my goal and I have been working for two years on that. After the examination, when I cross-checked my answers, I was confident I will get an excellent score. But still was not hopeful of scoring a 100," Srivastava said.
The Mount-Carmel student said he was really fond of playing chess and "am good at it".
"The game itself teaches us to make calculated moves. I follow the same thing for my aims as well. I want to study computer science engineering and I am confident I will make it," he said.
Those clearing the JEE-Main are eligible for appearing for JEE-Advanced for admission into the prestigious Indian Institutes of Technology (IITs). However, JEE-Main scores are used for admission in other engineering colleges.
Srivastava's father is also an IIT alumnus. But the students says there was no family pressure on him to pursue engineering.
"Many of my friends say that since your father is an IITian he must want you to get there only. I love the subject and I want to study it. There is no pressure or a family debate. My sister is also studying engineering," he said.
While Srivastava's father is a senior Air India official, his mother is a homemaker.
Among the 24 toppers, four are from Rajasthan and Telangana each, three each are from Madhya Pradesh and Maharashtra, while Uttar Pradesh, Andhra Pradesh and Haryana have two top scorers each.
The remaining are from Karnataka, Punjab, Jharkhand (one each).
For the first time, the JEE-Main this year was conducted twice -- January and April -- in online mode.
"For those candidates who appeared in both January and April examinations, their best score of the two attempts, has been accounted for. Out of 6.8 lakh candidates appearing in both the attempts, 2.97 lakh candidates have improved their performance," a senior official said.
"The ranks of the candidates have also been decided taking into account better of the two NTA scores," the official added.