Would moon cakes be easy to find in Chinatown, Manhattan?
Moon cakes are a Chinese traditional desert. Chinatown offers many 'tastes of home' to Chinese locals and travelers.
The answer is yes.

Do Muslims have a different idea of Seraphim than Christians?
Seraphim are celestial of heavenly beings. Christians refer to Seraphims as the highest choir of the angelic hierarchy and caretakers of God's throne. Muslims refer to Seraphim as beings created from celestial fire that are part of an exalted assembly.
The answer is no.

Could all Tahiti hotels hypothetically accommodate US D-Day troops?
Tahiti has 47 hotels with around 3,000 rooms. The US D-Day force consisted of:23,250 on Utah Beach, 34,250 on Omaha Beach, and 15,500 airborne troops.
The answer is no.

Did Clark Gable appear in any movies scored by John Williams?
Clark Gable died in 1960. John Williams scored his first movie in 1961.
The answer is no.