Title 22421-2019-Winter-model-answer-paper.pdf ✅

MAHARASHTRA STATE BOARAD OF TECHNICAL EDUCATIOD (Autonomous) (ISO/IEC-27001-2005 Certified) WINTER– 2019 Examinations Subject Code: 22421 Model Answer Page 1 of 15 Important suggestions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2) The model answer and the answer written by candidate may vary but the examiner may try to assess the understanding level of the candidate. 3) The language errors such as grammatical, spelling errors should not be given more importance. (Not applicable for subject English and communication skills) 4) While assessing figures, examiner may give credit for principle components indicated in a figure. The figures drawn by candidate and model answer may vary. The examiner may give credit for any equivalent figure drawn. 5) Credits may be given step wise for numerical problems. In some cases, the assumed constant values may vary and there may be some difference in the candidate’s answers and model answer. 6) In case some questions credit may be given by judgment on part of examiner of relevant answer based on candidate understands. 7) For programming language papers, credit may be given to any other program based on equivalent concept. Q.1 Attempt any FIVE of the following 10 Marks a) Sketch symbol and write truth table of two input EX-OR gate. Ans: 1 mark for diagram and 1 for TT b) Define the term 'Multiplexer'. State two examples of multiplexer. Ans: 1 mark for definition and 1 for types A digital multiplexer or data selector is a logic circuit that accepts several (many) digital data inputs and selects one of them at any given time to pass on to the output. 1. Two input multiplexer 2. Four input multiplexer 3. Eight input multiplexer c) Implement T flip flop using J K flip flop. Write its truth table. Ans: