What methods were used by the Ottomans to defeat Constantinople?

massive cannons were fired at constantinoples great walls.

What strategies or methods did the Ottomans use to conquer Constantinople?

The city were bombarded by cannon fires which was designed by Mehmed the Second himself. Constantinople had been attacked in the past many times, but its great walls always prevailed. Sultan Mehmed, II changed this with the use of cannons forever. Sultan's massive cannon fired on the walls for weeks.

How do you think the Ottomans were able to conquer Constantinople?

How were the Ottomans were able to Conquer Constantinople? The Ottomans were able to conquer Constantinople because they had the advanced technology to break down the wall and then took over, which made their empire very powerful later on.

There hopped that helped :)