A kingdom of west central Africa founded around 1390 had which name, like two present-day countries but spelled with a K?

A keyboard, CD-ROM drive and modem are all examples of computer what? Which children's classic is called "El león, la bruja y el ropero" in Spanish? In which Shakespeare play is a king named Duncan murdered? Which Danish-Norwegian king rebuilt Oslo in the 1600s, after which the city was named for him for a time? Which word names both a king's headgear and a tooth cover? A klutz or bungler is said to be "all" what? Which knighted Englishman sailed around the world in the Golden Hind? A Kraft favorite that debuted in 1937 contains which food in orange powder form?