{"id":1075,"date":"2021-03-01T14:17:15","date_gmt":"2021-03-01T08:32:15","guid":{"rendered":"https:\/\/bcisnotes.com\/secondsemester\/?p=1075"},"modified":"2021-03-01T14:17:15","modified_gmt":"2021-03-01T08:32:15","slug":"pokhara-university-spring-2017-digital-system-bba-bcis","status":"publish","type":"post","link":"https:\/\/bcisnotes.com\/secondsemester\/question-bank\/pokhara-university-spring-2017-digital-system-bba-bcis\/","title":{"rendered":"Pokhara University || Spring 2017 || Digital System || BBA\/ BCIS"},"content":{"rendered":"

This is the question set along with answers of Digital System Spring 2017 Pokhara University, which was taken by Pokhara University.<\/p>\n

POKHARA UNIVERSITY \u2013 Digital System Spring 2017<\/strong><\/p>\n

Level: Bachelor\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Semester: Spring\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Year:2017<\/p>\n

Program: BBA\/BBA-BI\/BCIS\/BHCM\/BBA-TT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Full Marks: 100<\/p>\n

Course:\u00a0 Digital System\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Pass Marks: 45<\/p>\n

Time: 3 hrs<\/p>\n

Section \u201cA\u201d<\/strong><\/p>\n

Very Short Answer Questions<\/p>\n

    \n
  1. Why are digital systems popular? How do they differ from analog systems?<\/li>\n
  2. \u00a0Express the decimal number -127 in 1\u2019s complement form and 2\u2019s complement form.<\/li>\n
  3. What weight does 3 have in a decimal number (12345) 10?<\/li>\n
  4. Name two universal gates. Why are they called universal gates?<\/li>\n
  5. State and verify De Morgan\u2019s Theorem for three variables.<\/li>\n
  6. How is ROM different from RAM?<\/li>\n
  7. Write down the excitation table and characteristics equation of T flip- flop.<\/li>\n
  8. What do you understand by the modulus of a counter? How many flipflops are required to design the MOD 66 counter?<\/li>\n
  9. Draw the block diagram of ALU?<\/li>\n
  10. How many selection lines are required for a multiplexer to select 45 inputs?<\/li>\n<\/ol>\n

    Section “B”<\/strong><\/p>\n

    Attempt any six<\/strong> questions<\/p>\n

    11. Realize the following function using required NAND or NOR gates. F(a, b, c, d) = \u2211 (0, 1, 2,3,7,8,9,10,11,15)
    \n12. Write down four fundamental differences between Combinational Circuits and Sequential Circuits? State the steps to design a full adder circuit and explain.<\/p>\n

    13. Simplify the given Boolean function with don\u2019t care conditions (W, X, Y, Z) = \u2211 (0, 2, 7, 8, 10) + \u2211d (1,11,14, 15) and represent the simplified function in Product of Sum and Sum of Product. Also, find out the complement of the functions derived.
    \n14. Implement the Boolean expression F(A, B, C, D) = \u2211(0,2,3,4,7,8,9,10,11,14,15) using multiplexer circuit.
    \n15. Where are shift registers applied? Design four-bit serial in serial out (SISO) shift register using D flip-flop.
    \n16. Design 3-bit synchronous grey code binary counter using JK flip-flops stating detail procedures.
    \n17. Design a combinational circuit that takes 8 4 2 1 code as an input and provides an output in 8-4 -2-1 code.<\/p>\n

    Section “C”<\/strong><\/p>\n

    Case Analysis<\/strong><\/p>\n

    Reduce the number of states in the following state table and tabulate the reduced state table.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    Present State<\/td>\nNew State<\/td>\nOutput<\/td>\n<\/tr>\n
    <\/td>\nX=0<\/td>\nX=1<\/td>\nX=0<\/td>\nX=1<\/td>\n<\/tr>\n
    A<\/td>\nF<\/td>\nB<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
    B<\/td>\nD<\/td>\nC<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
    C<\/td>\nF<\/td>\nE<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
    D<\/td>\nG<\/td>\nA<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
    E<\/td>\nD<\/td>\nC<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
    F<\/td>\nF<\/td>\nB<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n
    G<\/td>\nG<\/td>\nH<\/td>\n0<\/td>\n1<\/td>\n<\/tr>\n
    H<\/td>\nG<\/td>\nA<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    From the reduced state diagram in question 18, draw the logical diagram using the required logical gates and required JK flipflops.<\/p>\n

    You may also like\u00a0Pokhara University || Fall 2017 || Digital System || BBA\/ BCIS<\/a><\/p>\n

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