Held at the Chennai office, three rounds of problem-solving skills took place.

In the first round, four basic coding questions were asked.

In the second round, some Java questions and more advanced logical coding questions were asked.

The third round presented a high difficulty level with a single question.

Following these rounds, a technical HR round occurred, featuring questions from your resume, work experience, and other related Java and puzzle-solving topics.

You need to validate an already filled Sudoku, checking whether the numbers are correct or not.

This validation must adhere to the condition that every cell can be accessed only once.