A total of five rounds.

One on-campus round:

• Asked about my projects.
• Described a project done on color-based object tracking.
• Then asked me to write a function that takes a number as input and outputs it in Roman numeral form.

On-site – Had four rounds:

• First Round: Implement a class that lets you define user-defined data types. The class should let the user input the number of bits and construct a data type having that many bits.
• Second Round: Given a Tic-Tac-Toe board, determine if it had a winner.
• Third Round: Design the Minesweeper game.
• Fourth Round: A general discussion on how to decide aspect ratio and how to determine a scroll bar's size relative to text. This covered ratios for different monitor sizes.
  • A question on how to determine if two nodes in a binary tree are adjacent.
  • Given an expression in JavaScript, write code to determine if it is a regular expression. (No need to know what a regular expression is beforehand; it was explained, and I was asked to code it.)

Each round was about 1 to 1.5 hours long.

The Minesweeper design question.

I had to practice object-oriented design, be quick-thinking, interact with the interviewer to extract useful information, and ask the right kinds of questions.