ECE E-LEARN: DIGITAL ELECTRONICS NOTES

IMP QUESTIONS :

I B.Tech II Semester – Descriptive Examination-I

Digital Electronics IMPORTANT QUESTIONS UNIT WISE

(Common to CSE, IT, CSIT, IOT, AIDS, AIML)

Subject Code: P21EST10 Academic Year: 2021-22 R21 Regulation

UNIT: 1

Q.No	Questions	Marks	BL	CO	PI
1	a)Explain Abou types of Number system?	5 M	L3	1
2	b) Convert (115)₁₀ and (235)₁₀ into hexadecimal numbers.	5 M	L3	1
3	b)Subtract 101010 from 110111 using 2’s complement method.	5 M	L3	1
4	Explain about 1’s complement and 2’s Complent with Example?	5M	L2	1
5	Write the Excess-3 code and Gray code for decimal digit 9	5M	L3	1

UNIT: 2

Q.No	Questions	Marks	BL	CO	PI
1	Demonstrate by means of truth tables the Boolean Associative law and distributive law?	5 M	L5	2
2	Explain about Duality Principle and Princple of Complement?	5 M	L3	2
3	Draw the Logic gates with Truth Tables?	5 M	L1	2
4	Find the Boolean function F = A + B’C as standard sum of minterms.	5M	L3	2
5	Reduce the Boolean Expression by using boolean Laws	5M	L3	2

UNIT : 3

Q.No	Questions	Marks	BL	CO	PI
1	Find the Boolean Equation for Sum of Product of F(A,B,)=(A’B+B)	5 M	L5	3
2	Find the boolean Equation for Product of Sum f(A,B) =(A’+B)(A)	5M	L5	2

UINIT -4

Q.No	Questions	Marks	BL	CO	PI
1	Draw the full adder circuit and Explain its operation with truth table	5 M	L5	3
2	Draw the circuit diagram of 4x1 mux and give the truth table	5 M	L3	4
3	Explain about 3x8 decoder and draw the logical diagram with truth table	5 M	L2	4
4	List of Application of encoder and Decoder	5M	L3	4
5	Explain about Binary adder and subtractor?	5M	L3	4

UNIT-5

Q.No	Questions	Marks	BL	CO	PI
1	Draw and Explain the block diagram of PLA?	5 M	L5	5
2	Comparison of PROM,PLA,PAL?	5 M	L3	5
3	What is PAL, Explain the operation with logical diagram?	5 M	L1	5
4	Explain about PROM?	5M	L2	5
5	Explain about different types of Memories?	5M	L2	5

ECE E-LEARN