I submitted the resume via their website. The HR person contacted me and described the opportunities at the company and mentioned the R&D department. We had a followup screening phone call, which went well. Then, they asked me to come in the office for the on-site interview. I met the team members and looked at the office. They sent the background check documents, which I had to fill in before they could make an offer.

Describe the HashTable. What is its complexity? How do you improve its performance?

Explain what happens after the user submits the URL in the browser.

What's an IP? How does it work?