M. B. Khalsa College, Indore (M.P.)

C.C.E- Bsc IV Semester,

Paper: Electronics-II, Subject: Computer Networks

 Multiple Choice Questions

Q1. The information to be communicated in a data communications system is the ____________. (a) Protocol (b) Medium (c) Signal (d) All the above.

Q2. Communication between a computer and a keyboard involves ___________ transmission. (a) Simplex (b) Half-duplex (c) Full-duplex (d) Automatic

Q3. Which encoding method uses alternating positive and negative values for 1’s?

(a) NRZ-I (b) RZ (c) Manchester (d) AMI

Q4. A ________ is a set of rules that governs data communication.

(a) Protocol (b) standard (c) forum (d) None of the above

Q5. The _______ layer lies between the network layer and the application layer.

(a) Physical (b) Data link (c) Transport (d) None of the above

Q6. In the OSI model, encryption and decryption are functions of the ________ layer.  (a) Transport (b) Session (c) Presentation (d) Application

Q7. _______ Cable is used for voice and data communications.

(a) Coaxial (b) Fiber-optic (c) Twisted-pair (d) none of the above

Q8. __________ is the protocol suite for the current Internet.

(a) TCP/IP (b) NCP (c) UNIX (d) ACM

Q9. The Internetworking Protocol (IP) is a ________ protocol.

(a) Reliable (b) Connection-Oriented (c) Both a and b (d) None of the above

Q10. Which multiplexing technique transmits digital signals?

(a) FDM (b) TDM (c) WDM (d) None of the above

Q11. The ATM standard defines ______ layers. (a) Two (b) Three (c) Four (d) Five

Q12. The ATM data packet is a cell composed of ______ bytes. (a) 40 (b) 50 (c) 52 (d) 53

Q13. The _______ layer of Ethernet consists of the LLC sublayer and the MAC sublayer.

(a) Data link (b) Physical (c) Network (d) None of the above

Q14________technology is a set of technologies developed by the telephone companies to provide high data rate transmission. (a) ASL (b) DSL (c) LDS (d) None of the above

 Short Answer Type Question

Q Write a short note on serial data format.

Q Write a short note on co-axial and fiber optical cable.

Q Write a short note on Local Loop and Toll Office.

Q What do you understand by DTE & DCE? Explain in brief.

Q Explain TDM in brief.

Q Explain FDM in brief.

Q Differentiate between Pulse Code Modulation & Delta Modulation.

Q Explain the Framing in brief.

Long Answer Type Question

Q Explain Encoded Data Formats with suitable diagrams.

Q Explain the structure of Telephone System in detail with diagram.

Q What is Hamming code? Give an example to demonstrate how the Hamming Code 

     corrects an error in data transmission?

Q  Explain OSI model with diagram. Explain the functions of each layer.

Q Draw CODEC transmitter and receiver block diagram & explain it.

Q Explain Bit Oriented and Character Oriented Protocol.

Q Explain Ethernet, Token Bus and Token ring with the help of diagrams.

Q Explain functions of each layer of TCP/IP model with the help of diagram.

Q Describe Network Architecture Protocol.

Q Describe ATM protocol Layer & show ATM protocol stacks.

Q  Explain merits and demerits of ISDN & DSL.

Submit To: Prof. R.S. Popli

BCA IV Semester Assignment 2011

BCA IV Semester

DIGITAL COMPUTER ORGANIZATION (D.C.O.)

ASSIGNMENT NO. 1

 Q1.Explain in brief Second & Fourth generation of computers. Explain in brief Hardware, Software and Firmware?
Q2. What is difference between Microprocessor and Micro-computer ? How processing speed of computer is measured and what is word length? If a computer can process 32 bits at a time then what is its word length.
Q3.Differentiate between a) Computer Organization & Computer Architecture with example. b) Control Flow & Data Flow Computer
Q4.Explain in brief Computer System with the help of diagram .
Q5.Explain the construction of and working of LASER and Dot-Matrix printer.
Q6.Discuss operating principles of a raster scan CRT display and a vector scan CRT display.
Q7.Explain Hard Disk and Floppy Disk.
Q8.What is a Scanner ? Explain the working of different types of Scanner.
Q9.What are various Key switches. What is two key roll-over & two key lockout.?
Q10.Write short notes on the following:
(i) Virtual Memory (ii) Memory Controller (iii) Optical Disc

ASSIGNMENT NO. 2

Q1. Explain in brief different types of RAM & ROM.
Q2. What is program & data memory and where it is used?.
Q3. Explain one bit SRAM & DRAM memory cell with the help of diagram.
Q4. Explain in brief about read/write magnetic head.
Q5. What is Cache Memory? What do you understand by look-aside and look-through cache?
Q6. Explain any two cache replacement algorithm.
Q7. Explain virtual memory mapping technique with the help of an example.
Q8. Explain in brief various cache memory mapping procedures.
Q9. Explain in brief
(a) Batch Processing (c) Multiprogramming (d) Multiprocessing.
Q10. What is Flynn’s Classification of parallel computers? Briefly explain about pipelining.

 Note: Last Date for Assignment No. 1 is 7 June 2011 & Assignment No. 2 is 15 June 2011

CCE
M.B. Khalsa College
Bsc IInd Year (3rd Semester)
Electronics Paper II: Digital Electronics II (EL-2102)

Objective

Q1. The main advantage of Schottky TTL logic is its least:
(a) Power dissipation (b) Propagation delay (c) Fan-In (d) none of these.

Q2. A Flip-Flop may be built with:
(a) NAND gates (b) AND gates (c) AND plus OR gate (d) Any of the above.

Q3. Shifting the contents of a shift register, left by one place, equivalent to:
(a) Dividing the contents by 10 (b) Dividing the contents by 2 (c) Multiplying the
contents by 2 (d) none of these.

Q4. In Sequential circuits memory elements are: (a) Astable (b) monostable (c) bistable (d) Tri-state flip-flops.

Q5. An ADC, with 8-bit output, giving full deflection for 12V analog signal, its resolution is: (a) 8/12 V (b) (8*12) mV (c) 8/256 V (d) 12/256 V.

Subjective Questions

Q1. Explain TTL NAND & NOR Gate with suitable diagram.

Q2.What is meant by Racing Condition and Race Around condition in flip-flop?

Q3. Explain Master Slave JK flip-flop. Why Master Slave flip-flops is preferred Over JK Flip Flop.

Q4. Distinguish between Synchronous & Asynchronous Counter. What are important Applications of Counter?

Q5. What do you understand by term Accuracy and Resolution of an ADC?

Q6. What is Totem-Pole connection? Why it is so called? Explain it’s working & advantages when used in TTL circuits.

Q7 List the main characteristics of CMOS logic family & compare with TTL logic family.

Q8. What are different forms of triggering flip-flops? Explain each one with example.

Q9. Explain the operation of PIPO & PISO shift register with the help of a diagram.

Q10. Explain the operation of Bi-directional shift register with the help of a diagram.

Q11. Explain Asynchronous mod-6 up counter with the help of a timing diagram.

Q12. Describe the operation of BCD down counter with help of timing diagram.

Q13. Explain R-2R ladder digital to analog converter (DAC) with help of diagram.

Q14. Explain Continuous analog to digital converter (ADC) with help of diagram.

    Bsc III Semester

EL-2102

DIGITAL ELECTRONICS -II

Unit I: TTL Circuits

TTL Circuits,  Digital Integrated Circuits:  7400  Series, TTL  Characteristics,  TTL Overview, Open
Collector  & Totem  Pole Outputs,  Difference between TTL types including  Schottky, Low power
Schottky, Standard and Low Power TTLs. Introduction to MOS Logic Family, Comparison between TTL
and MOS Families.

Unit II: Latches & Flip Flops

RS  and  D-Latches,  RS Flip-Flop, Edge triggered D,  JK and T  Flip-Flop.  Concept of  Racing  and JK
Master Slave Flip Flops.

Unit III: Registers

Buffer Registers, Shift Registers, Controlled Shift Registers.

Unit IV: Counters

Ripple Counters, Synchronous Counters, Ring Counters, Synchronous and Asynchronous loading of the
Counters, Clear and Preset in the counters.

Unit V: Converters

Basic D/A Converters: R-2R, Binary Weighted Resistor type, A/D Converters: Counter, Ramp, Flash
and Successive Approximation. Sample and Hold Circuits: Basic Concept and Working.

BOOKS RECOMMENDED:
1.  Digital Principles and Applications   : Malvino and Leach
2.  Modern Digital Electronics           : R.P. Jain
3.  Digital Computer Electronics     : Malvino and Brown

Note: The question paper will have the usual Note saying “Attempt five questions choosing one from
each unit”. Thus the paper will clearly specify units and have a pattern of two questions per unit with an
option to attempt any one of these two within each unit. The balance of paper will be maintained by
including appropriate (Numerical / Objective / Conceptual / Analytical / Theoretical) combination of
subsections in each question.