EY interview question

Question related to transformer , GENAI, RAG , Fine tuning , Deep Learning Python Question === 1- 1??0?101??11. replace ? with all possibilities of 0 and 1 Question 2= Input [1,0,1,0,2,3,4,0,0,20] Output=[1,1,2,3,4,20,0,0,0,0] without any library and in build function ( use loop only )