This is a Question Papers of Mumbai University for B.Sc.IT Student of Semester - I [Fundamentals of Digital Computing] (Revised Course). [Year - April / 2014] . . .Solution Set of this Paper is Coming soon..

1. F u n d a m e n t a l s o f D i g i t a l C o m p u t i n g
Q u e s t i o n P a p e r ( A p r i l – 2 0 1 4 ) [ R e v i s e d C o u r s e ]
1 | Page
M u m b a i B . S c . I T S t u d y
F a c e b o o k | T w i t t e r | I n s t a g r a m | G o o g l e + | Y o u T u b e
– Kamal T.
Time: 3 Hours Total Marks: 100
N.B.: (1) Al Questions are Compulsory.
Q.1 Attempt Both The Question: (10 Marks)
(A) Convert (25.56)10 into its equivalent binary, octal and hexadecimal format. (5)
(B) Write a short note on AND, OR and NOT Gate. (5)
Q.2 Attempt Any Three From The Following: (15 Marks)
(A) Write a short note on Excess-3 code. (5)
(B) Multiply (10101101)2 and (1110)2 (5)
(C) Explain the floating point representation of numbers. (5)
(D) Divide (10101101)2 by (110)2 and find the quotient and remainder. (5)
Q.3 Attempt Any Three From The Following: (15 Marks)
(A) Define Minterm. Describe the method of representing the minterm of two, three and
four variables using K-map.
(5)
(B) For XOR gate prove that, 𝐴 ⨁ 𝐵 B = 𝐴 𝐵′
+ 𝐴′
. Hence prove that (𝐴 ⨁ 𝐵)′
=
𝐴′
𝐵′
+ 𝐴𝐵
(5)
(C) “NOR gate is known as universal gate” – state and explain. (5)
(D) Simply the following function 𝐹(𝑎, 𝑏, 𝑐, 𝑑) = ∑ 1, 3, 5, 9, 11, 13 and draw the logic
circuit diagram using basic logic gates.
(5)
Q.4 Attempt Any Three From The Following: (15 Marks)
(A) Write a short note on Half Adder. (5)
(B) Define Decoder. Describe the Decoder circuit with an example. (5)
(C) Implement the following function 𝐹(𝑎, 𝑏, 𝑐, 𝑑) = ∑ 0, 1, 3, 8, 9, 15 using multiplexer. (5)
(D) Define Encoder. Explain the circuit with an example. (5)
Q.5 Attempt Any Three From The Following: (15 Marks)
(A) Write a short note on Register. (5)
(B) Define Flip Flop. Write a short note on RS Flip Flop. (5)
(C) Define Counter. Design the Circuit Diagram for 3-Bit Binary Counter. (5)
(D) Define Synchronous Counter with an example Circuit Diagram. (5)

2. F u n d a m e n t a l s o f D i g i t a l C o m p u t i n g
Q u e s t i o n P a p e r ( A p r i l – 2 0 1 4 ) [ R e v i s e d C o u r s e ]
2 | Page
M u m b a i B . S c . I T S t u d y
F a c e b o o k | T w i t t e r | I n s t a g r a m | G o o g l e + | Y o u T u b e
– Kamal T.
Q.6 Attempt Any Three From The Following: (15 Marks)
(A) Draw the Basic Functional Diagram of a Digital Computer and explain each component. (5)
(B) Write a short note on Mouse. (5)
(C) Write a short note on RAM and ROM. (5)
(D) Define Printer. List The different types of Printer Devices. (5)
Q.7 Attempt Any Three From The Following: (15 Marks)
(A) Define Distributed Operating System. List the characteristics of Distributed OS. (5)
(B) Write a short note on Real time Operating System. (5)
(C) Differentiate between Multi-User and Single-User Operating System. (5)
(D) Write a short note on Linux Operating System. (5)