Nielit releases answer key of scientist B and Technical assistant post https://www.calicut.nielit.in/nic/
@ayush.5 Yes bro getting approximately 0.7 ns but they haven't specified order or cache accesses (on followed by off or viceversa), in general cache questions, they specify caches with numbers like L1,L2 so we access L1 followed by L2 in that case but here no clarity regarding order of access.
I think we can challenge it.
you may refer this https://www.geeksforgeeks.org/full-adder-in-digital-logic/#:~:text=A%20full%20adder%20logic%20is,one%20adder%20to%20the%20another.&text=Therefore%20COUT%20%3D%20AB%20%2B%20C%2D,Full%20Adder%20logic%20circuit.&text=2%20Half%20Adders%20and%20a,to%20implement%20a%20Full%20Adder.
@Hradesh Patel added few questions on csedoubts from set 'A' for STA, https://csedoubts.gateoverflow.in/user/Hradesh+patel/questions
@VIDYADHAR SHELKE 1, if possible can you share the 2020 nielit paper....