Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 4th Sem New 2142406 Digital Electronics And Its Applications Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code:2142406 Date:05/12/2018
Subject Name:Digital Electronics and its applications
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Do as directed:
(1) (1011.01)2 = ( )10 (2) (105)10 = ( )2
03
(b) Do as directed:
(1) (43)8 = ( )10
(2) 1's complement of (1101)2 and (1011)2
04
(c) Explain half and full adders in detail. 07
Q.2 (a) What is role of complement in digital system. Compare 1's and 2's
complement.
03
(b) Subtract (1011001)2 - (1101010)2 using 2's complement. 04
(c) Draw & explain the block diagram of a 4:1 Multiplexer using 2:1
Multiplexer.
07
OR
(c) With neat diagram Implement Y= AB+CDE+F using NAND gate. 07
Q.3 (a) (1010)2/ (101)2 = ( )2 03
(b) Explain in brief two bit Magnitude Comparator. 04
(c) Simplify the following Boolean function using K-MAP?
F(A,B,C,D,E) = ? (0,2,4,6,9,11,13,15,17,21,25,27,29,31)
07
OR
Q.3 (a) Explain PLA and it?s application 03
(b) What do you understand by Decoder? Draw & explain 3-to-8 line
Decoder.
04
(c) Discuss NOR and NAND gate as universal gate. 07
Q.4 (a) Explain in brief Triggering of Flip-Flops. 03
(b) What is basic requirements of memory? Explain in brief
EEPROM.
04
(c) Write a note on edge-triggered SR and JK Flip-Flops 07
OR
Q.4 (a) Compare Combinational logic & sequential logic? 03
(b) Give classification of memory. Differentiate SRAM & DRAM 04
(c) Give classification of counters and explain asynchronous
4-bit binary ripple counter.
07
Q.5 (a) Define followings:
(1) Flip-Flop (2) Fan out (2) Logic Gates
03
(b) List out the various applications of ROM memory. 04
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code:2142406 Date:05/12/2018
Subject Name:Digital Electronics and its applications
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Do as directed:
(1) (1011.01)2 = ( )10 (2) (105)10 = ( )2
03
(b) Do as directed:
(1) (43)8 = ( )10
(2) 1's complement of (1101)2 and (1011)2
04
(c) Explain half and full adders in detail. 07
Q.2 (a) What is role of complement in digital system. Compare 1's and 2's
complement.
03
(b) Subtract (1011001)2 - (1101010)2 using 2's complement. 04
(c) Draw & explain the block diagram of a 4:1 Multiplexer using 2:1
Multiplexer.
07
OR
(c) With neat diagram Implement Y= AB+CDE+F using NAND gate. 07
Q.3 (a) (1010)2/ (101)2 = ( )2 03
(b) Explain in brief two bit Magnitude Comparator. 04
(c) Simplify the following Boolean function using K-MAP?
F(A,B,C,D,E) = ? (0,2,4,6,9,11,13,15,17,21,25,27,29,31)
07
OR
Q.3 (a) Explain PLA and it?s application 03
(b) What do you understand by Decoder? Draw & explain 3-to-8 line
Decoder.
04
(c) Discuss NOR and NAND gate as universal gate. 07
Q.4 (a) Explain in brief Triggering of Flip-Flops. 03
(b) What is basic requirements of memory? Explain in brief
EEPROM.
04
(c) Write a note on edge-triggered SR and JK Flip-Flops 07
OR
Q.4 (a) Compare Combinational logic & sequential logic? 03
(b) Give classification of memory. Differentiate SRAM & DRAM 04
(c) Give classification of counters and explain asynchronous
4-bit binary ripple counter.
07
Q.5 (a) Define followings:
(1) Flip-Flop (2) Fan out (2) Logic Gates
03
(b) List out the various applications of ROM memory. 04
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2
(c) Discuss Following
1) Accumulator Register
2) ALU Status Register
3) Scratchpad memory
07
OR
Q.5 (a) Discuss the differences between hard wired control & Micro
program control. State the merits of one over the other.
03
(b) Explain Concept of register transfer level. 04
(c) Enlist the methods of control organization? Explain any one in
details.
07
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This post was last modified on 20 February 2020