Intrinsic: August 2010

Monday, August 30, 2010

Electronic Instrumentation

Electronic Instrumentation Test 1-2007

Part A:

1. Explain with a detailed diagram the measurement of frequency (10 marks)

2. Explain the successive approximation method of analog to digital conversion

used in digital voltmeters with detailed diagram (10 marks)

Part B:

3(a) Explain with diagram and waveform the Integrating type DVM to convert

Voltage to frequency. (8 marks)

(b) An integrator contains a 100 Kilo Ohm and 1 microfarad capacitor. If the

voltage applied to the integrator output is 1 Volt, what voltage will be present

at the output of the integrator after 1 second? Now, if a reference voltage

applied to the integrator at time t₁is 5 volts, what is the time interval

of t₂. (2 marks)

4. Figure shows a simple series circuit of R1 and R2 connected to a 100 Volt

DC source. If the voltage across R2 is to be measured by voltmeter

having

(a) a sensitivity of 1000 ohms/volt and

(b) a sensitivity of 20,000ohms/volt,

find which voltmeter will read the accurate value of voltage across R2.

Both meters are used on 50 Volt range. (10 marks).

Part C:

5. Convert the basic D’Arsonval movement with an internal resistance

of 50 Ohms and a full scale deflection current of 2 milliamps into a

multi-range DC voltmeter with voltage ranges of 0-10 volts and 0-50 volts

(5 marks)

6. Explain Gross error, Systematic error, Absolute error and

Relative error. (5 marks)

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Electronic Instrumentation Test 2-2007

Part A:

1(a) Explain the different CRT features. (5 marks)

(b) Explain the different types of sweeps. (5 marks)

2 Explain the operation of triggered sweep CRO with appropriate

diagram. (10 marks)

Part B:

3. Explain the different parts of a typical CRT connection with

appropriate diagram. (10 marks)

4. Explain with diagram the electronic switch used in dual trace

oscilloscope. (10 marks)

Part C:

5. Explain briefly with diagram the principle of operation of the

variable persistence storage CRT. (5 marks)

6. Draw the circuit diagram of the sampling oscilloscope system

and explain briefly with waveforms. (5 marks)

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Electronic Instrumentation Test 3-2007

Part A:

1(a) Arrive at the Thevanin’s equivalent circuit for slightly unbalanced

Wheatstone’s bridge. (5 marks)

(b) An unbalanced Wheatstone’s bridge is as shown. Calculate the

current through the galvanometer. (5 marks)

2(a) How is unknown frequency measured using a bridge? Explain

with appropriate expression. (5 marks)

(b) Explain the method of eliminating stray capacitances in a bridge. (5 marks)

Part B:

3. Explain the working of the Linear Variable Differential Transducer. (10 marks)

4. What is the working principle of a strain gauge? Derive the expression

for the gauge factor of a strain gauge. (10 marks)

Part C:

5. With a neat diagram and waveform explain how the stored information

is recovered in a digital storage oscilloscope. (5 marks)

6. Explain the following:

(i) Interpolation

(ii) Sampling rate and bandwidth. (5 marks)

Wednesday, August 25, 2010

Fundamentals of CMOS VLSI

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CMOS VLSI 1-2008

Part A

1. Write neat diagrams and explain the working of the nMOS Enhancement type transistor.

2. Give the MOS device design equations in detail. (10 marks)

Part B

3. Explain in detail the working of a Transmission gate in
detail. (10 marks)

4. What is the significance of the Lambda based design rules. (10 marks)

Part C

5. Draw the stick diagram for the CMOS Nand gate . 5 marks)

6. Draw the symbolic diagram of CMOS inverter. (5 marks)

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CMOS VLSI 2-2008

Part A

1 (a) Explain the features of pseudo nMOS logic with an
example (04 marks)

(b) With XNOR truth table design pass transistor logic.

What are it’s advantages and disadvantages? (06 marks)

2 (a) What is dynamic CMOS Logic? Explain the “precharge” and

“evaluate” of this logic. (06 marks)

(b) With an example and circuit diagram explain features of

C²MOS logic. (04 marks)

Part B

3 (a) Draw BiCMOS Nand gate with NPN pull down and bring

out it’s features. (06 marks)

(b) With an example bring out the features of CMOS

complementary logic. (04 marks)

4 (a) Write the stick diagram for two input CMOS NOR gate. (06 marks)

(b) Explain the disadvantages of two inputs NMOS NAND gate (04 marks)

Part C

5. Briefly explain the architectural issues of subsystem design (05 marks)

6. Derive the overall ratio of two input NAND gate using NMOS

and show that it is 4:1. (05 marks).

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CMOS VLSI 3-2008

Part A

1. What is a parity generator? Draw the basic one-bit cell of parity generator with stick diagrams for nMOS. Also write the equations for the conditions (10 marks)

2. (a) Explain the active passive and precharged bus concepts with neat diagrams (06 marks)

(b) A MOS layer is 5 λ wide, 60 λ long and 1 µm thick. The resistivity of the layer is 1 Ω cm. Using sheet resistance concept, calculate the resistance of the MOS layer along its length. Derive the equations used in the calculations. (04 marks)

Part B

3. Write the basic digital processor architecture. Explain the one bus, two bus and three bus architecture with diagram for basic ALU structure

(10 marks)

4. Explain how large capacitive loads are driven using cascaded inverters.

(10 marks)

Part C

5. What are the disadvantages of 4x4 cross bar switch used as a shifter? Draw the circuit which overcomes these disadvantages and explain.

(05 marks)

6. Explain the working of super buffers. Draw the inverting and non-inverting type of super buffers. (05 marks)

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Friday, August 20, 2010

Management And Entrepreneurship

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Management and Entrepreneurship Test 1-2009

Part A

1a) Briefly explain the functional areas of management -5-

b) Define planning and discuss it’s importance -5-

2a) Briefly explain the concept of modern management approaches -5-

b) Briefly explain the steps involved in planning -5-

Part B

3a) What are the different roles of a manager -5-

b) What are the objectives under planning -5-

4a) What are the scientific management approaches -5-

b) What are standing plans and single use plans -5-

Part C

5. What are the differences between strategic planning

and tactical planning -5-

6. Discuss whether management is a science or an art -5-

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Management and Entrepreneurship Test 2-2009

Part A

What are the principles of an organization -10-
2. What is MBO and MBE -10-

PART B

What are the functions of a woman entrepreneur -10-
Give a comparative study of Intrapreneur,

Entrepreneur and Manager -10-

PART C

5. What are the functions of staffing -5-

6. What is recruitment and what are the functions of

recruitment -5-

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Management And Entrepreneurship Test 3-2009

Part A:

1. a. Explain the impact of Liberalization, Globalization and Privatization on small scale industries. -5-

b. What are the characteristics of small scale industries? -5-

2. a. Write a note on the following.

(i) Small Industries Development Organization

(ii) The National Industries Corporation -5-

b. Write notes on GATT and WTO. -5-

Part B:

3. a. What are various steps required to start a small scale industry? -5-

b. What are the objectives and problems of State Financial Corporations? -5-

4. a. Explain the role of District Industries Centers. -5-

b. Explain the role of SSIDs . -5-

Part C:

5. Define Ancilliary Industries and Tiny Industries. -5-

6. What are the advantages of small scale industries? -5-

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Management and Entrepreneurship Test 1-2010

Part A

1a) Briefly explain the functional areas of management -5-

b) Define planning and discuss it’s importance -5-

2a) Briefly explain the concept of modern management approaches -5-

b) Briefly explain the steps involved in planning -5-

Part B

3a) What are the different roles of a manager -5-

b) What are the objectives under planning -5-

4a) What are the scientific management approaches -5-

b) What are standing plans and single use plans -5-

Part C

5. What are the differences between strategic planning

and tactical planning -5-

6. Discuss whether management is a science or an art -5-

Network Security

Network Security Test 1-2010

Part A

1 a) Describe the various attacks on Security in a network -5-

b) Write a playfair matrix with the key word “WALKING”. Use it to

encipher the message “SUPPORT NEEDED URGENTLY”. If needed

use a dummy character. -5-

2a) In S-DES the S-Box design is given as

1	0	3	2
3	2	1	0
0	2	1	3
3	1	3	2

0	1	2	3
2	0	1	3
3	0	1	0
2	1	0	3

S₀ = S₁=

Find the output of the S-Box for the combination 1101 and 1000 given

to S0 and S1 respectively. -5-

b) Explain the cipher feedback mode of using DES . -5-

Part B

3a) Give the differences between.

(i) Differential and Linear Cryptanalysis.

(ii) Monoalphabetic and Polyalphabetic cipher . -5-

b) In a RSA system the public key of a user is e = 31, n = 3599.

What is the private key of the user. -5-

4a) Write down the RSA algorithm. -5-

b) Perform double transposition technique to decipher the text

I R I X A T L T N H Y E I S S T S E V E A T Y R S E N X

The Key is 4 3 1 2 5 6 7 -5-

Part C

5) Explain in detail the S-DES encryption with a block diagram and

describe all the steps . -5-

6) Explain with a block diagram a single round of DES algorithm

in detail. -5-

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Network Security Test 2-2010

Part A:

1a) Explain with block diagrams the public-key cryptosystem to provide

(i) Secrecy

(ii) Authentication

(iii) Secrecy and Authentication. -5-

b) Perform encryption and decryption using RSA for the following

p=17, q=31, e=07, M=2. -5-

2a) Consider a Diffie-Hellman scheme with common prime q=11 and a primitive root α=2 (i) Show that 2 is a primitive root of 11

(ii) If user A has a public key YA=9. What is A’s private key XA?

(iii) If user B has a public key YB =3, what is the shared secret key K? -5-

b) With neat diagrams explain the basic uses of hash function. -5-

Part B:

3a) Explain with neat diagrams SSL Architecture, Session state and Connection state.

-5-

b) What are the services offered by SSL Record Protocol. Explain the operation with a diagram. Also show the SSL record Format. -5-

4a) Explain with a neat diagram the 4 phases of the handshake protocol. -5-

b) Write the sequence of events for secure electronic transaction -5-

Part C:

5) The given Plain text is PAY MORE MONEY. Find the Cipher text in Hill Cipher -5-

6) Given cipher text is PQCFKU. Find the plain text using Hill Cipher . -5-

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Network Security Test 3-2010

Part A

1a) How are passwords stored and verified? Explain the process with a

neat diagram. -5-

b) What are the uses of audit records? Explain the different types with

examples. -5-

2a) What are the metrics used for profile based intrusion detection?

-5-

b) Write the examples of heuristics which are used to assign degrees of

suspicious activities -5-

Part B

3a) What is the current state of worm technology -5-

b) Give the general structure of virus and explain how it works -5-

4a) Explain the following: (1) Macro Virus

(2) Email Virus -5-

b) How does compression virus infect a program -5-

Part C

5) What are the advanced antivirus techniques Explain with diagram the

digital immune system -5-

6) What are the strategies for password selection so that password is not

easily guessable -5-

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Basic Electronics

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Basic Electronics Test 3-2007

Part A:

1 a) Convert from decimal to binary: 11.125 -2-

b) Convert (3576)₈ to hexadecimal -2-

c) Subtract (11101)₂ from (101011)₂ using 2’s complement method -3-

d) Prove that

AB+A+AB =0 -3-

2 a) Realize the following expression using basic gares: AB+A+(B+C) -3-

b) Explain the operation of full adder with a truth table and implement it using logic gates -5-

c) Implement the expression Y=AB+AB using -2-

i) only NAND gates

ii) only NOR gates.

Part B

3 a) Constuct a truth table for the following expression f=C(B+D) -3-

b) Implement F= (A+BC)(A+B+C)(A+B) using only NAND gates -3-

c) Convert (2604.10546875)₁₀ to hexadecimal -2-

d) Write the Boolean expression for the following logic diagram -2-

4 a) Perform I’s complement and 2’s complement subtraction on the following.

(1001101)₂ - (1001001)₂ -2-

b) Simplify using De Morgan’s theorem ABCD -2-

c) Implement using only NOR gates Y=(A+B+C)(A+B+C)(A+B) -3-

d) Simplify and implement using gates Y= (A+BC)(A+B+C) -3-

Part C

5 a) For an AM system, amplitude of modulating signal is 0.5 V and carrier amplitude is 1 V.

Find modulation index. -2-

b) Derive the expression for the instantaneous voltage of amplitude modulated wave. -3-

6 a) A carrier of 500w, 1 MHz is amplitude modulated with a sinusoidal signal of 1 KHz,

depth of modulation is 60%. Calculate bandwidth, power in the sidebands and total power

transmitted. -3-

b) The maximum and minimum amplitudes of an AM wave are 600mV and 200 mV

respectively. Find the modulation index. -2-

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