UGC NET Practice questions with Solutions
Q.1 An and and gate has 7 input how many input words arein truth table? 64 32 16 128 solution: To represent 7 inputs, 2^7 input words are required in truth table. 2^7=128 Thus the correct option is D. Q.2 A combinational logic circuit which is used to send data coming a single source to two or more separate destinations is called A. decoder B. encoder C. multiplexer D. Demultiplexer Solution: Multiplexer is a data selector which takes several inputs and gives a single output. Demultiplexer is a data distributor which takes a single input and gives several outputs. Q.3 In 2NF No functional dependencies exist No multivalued dependencies exist No partial functional dependencies exist No partial multivalued dependencies exist Solution: A relation that is in 2NFmust be in 1 NF. For 1NF, their should be no atomic value in the relation. For 2NF, their should be no partial functional dependency. thus the correct option is C. Q.4...
