Merkle Intern interview questions

Tech round 1 : You will be asked about your projects your main coding language , the you have to solve a dsa problem by sharing the screen. You will be asked situational questions about the projects. You have to write the code and explain the solution. You will be asked about how would you lead a team , how would you handle disagreements in the team. Also how would you explain your plan to someone. You will be asked About certification. Thats it , make sure you ask questions to the interviewer at the end

What is Saas, PaaS and IaC?