No, Krakatoa is not a shield volcano; it is classified as a stratovolcano.
Stratovolcanoes, also known as composite volcanoes, are characterized by their steep, conical shapes and are built up by layers of lava flow, ash, and other volcanic debris. Krakatoa, which is located in Indonesia, is famous for its explosive eruptions, particularly the catastrophic eruption in 1883 that had global climatic effects.
On the other hand, shield volcanoes have a broad and gentle profile, formed mainly by the flow of low-viscosity basaltic lava. They tend to produce less explosive eruptions compared to stratovolcanoes.
In summary, the nature of Krakatoa’s eruptions and its structure categorize it firmly within the stratovolcano family rather than as a shield volcano.