Can you describe a previous boss who was the most effective, and what made them so good to work for? And, can you also talk about a boss who was the least effective and what made it difficult to work under them?

Interview question asked to Engineering Managers interviewing at Souq, Instabase, Booking.com and others: Can you describe a previous boss who was the most effective, and what made them so good to work for? And, can you also talk about a boss who was the least effective and what made it difficult to work under them?.