(Please write
YOUT
CD
Exam Roll No.)
Exam Roll No ....
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END TERM EXAMINATION SEVENTH SEMESTER B.TECH.
DECEMBER-2012
Paper Code: ETEC401 Subject: Microprocessor Systems-II Time: 3 Hours Maximum Marks :75 I Note: Attempt all questions. Internal choice is indicated. Calculator is permitted.
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(al What is the purpose of the segment register in protected mode memory addressing? (b) What is the purpose of IP/ EIP register? (c) What determines whether a microprocessor is considered an 8-bit, a 16-bit or a 32-bit device? (d) (i) Describe the function of the 8086 queue. ~ (ii) How does the queue speed up the processing? (e) What is wrong with a Mav [BX],[OI]instruction? (f) What registers are placed on the stack by the PUSH instruction? In what order? (g) What is the difference between VESAlocal bus and the PCl bus? (h) Describe how address can be captured from the PCl bus? (i) What is the purpose of the DPO-DP7pins on Pentium? (j) Explain how two integer units allow the Pentium to execute two non-dependent instructions simultaneously? (2.5x10=25)
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Q1
Q2
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Explain briefly the internal microprocessor architecture diagrams.
of 8086 with necessary (12.5)
OR
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(a) Write a short and simple program that adds the BCD numbers in DX and BX and stores the result in CXwith the help of DAAinstruction. (6.5) (bl Describe how the LDS BX, NUMBinstruction operates. (3) . (c) Explain briefly about short, near and far jump instructions with appropriate figures. (3) OR Write a program to find the largest number among two inputted nos. (12.5)
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(a) Find the memory address of the NEXT instruction executed. by the microprocessor, when operated in the real mode for the following CS:lP combinations. (5) (i) CS=1000H and IP=2000H , (ii)CS=2000H and lP=1000H (iii)CS=2300H and lP=lAOOH (iv)CS=lAOOHand IP=BOOOH . (v) CS=3456H and IP=ABCD (b) What is the difference between an intersegment and intrasegment jump? (2.5) (c) Suppose that DS=0200H, BX=0300H and 0I=400H. Determine the memory address accessed by each of the following instructions, assuming real mode operation:(5) (i) MOVAL, [1234H] (ii)Mav EAX, [BX] (iii)Mav [DIl,AL
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Q5
(a) Discuss about the 16-bit memory interfacing of 8086 micro processor. (6.5) (b) How could all of the MMX registers be stored in the memory with one instruction? (6) OR (a) Write briefly about the architecture of co-processor (8087). (7.5) (b) Discuss about the architecture of multiprocessor system. (5) (a) Describe the operation of SYSENTERand SYSEXlTinstructions. (5) (b) What is the system memory management mode of operation for the' Pentium? (4) (c) Contrast the Pentium with the Pentium pro-mfcroprocessor. (3.5) OR (a) Write about the following special Pentium registers. (7) (i) Control registers (ii)EFLAGregister (iii)BlST (built-in self-test) (b) Discuss about Pentium memory management by including the paging unit and memory management mode. (5.5) ************
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END TERM EXAMINATION SEVENTH SEMESTER
Paper Code: ETEC403 Time: 3 Hours Note: Attempt five questions including
Maximum Marks :75
Q. nO.l which is compu,lsory. Select one question from each unit.
c. in
Q2
(al Discuss advantages and disadvantages of optical fiber in communication system. (4) (b) What are different wavelength regions in which fiber optic communication takes place?' (4) (c) How does light travel along the fiber? Also, explain why light travels faster in cladding than in core? (4) (d) Differentiate between intermodal and intramodal dispersion. (4) (e) Name the three layers of P-I-n photodiode. What is the purpose of the middle layer? (4) (f) Discuss two commonly used network topologies in optical fiber communication network. (5) UNIT· I (a) With the help of a block diagram discuss various components of an optical communication system both in analog and digital link. (6.5) (b) A multimode step index fiber has a core diameter of 80j.lm and a relative index difference of 1.5%. It is operating at a wavelength of O.85~lrn. Find (i) The normalized frequency for the fiber. (ii)The number of guided modes. The core refractive index is given as 1,48. (6)
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(a) What is a step index fiber and guided index fiber? Give brief description of both and their distinguishable features. (6.5) (b) Calculate the critical angle at core-cladding interface within the fiber core if core refractive index=1.46 and relative index difference=l%. Hence find N~. (6)
OR
(a) Describe techniques employed to provide Dispersion shifted single mode fibers and dispersion flattened single mode fibers. (6.5) (b) A 6km optical link consists of a multimode step index fiber with a core refractive index of 1.5 and a relative index difference of 1%. Estimate the maximum bit rate assuming only intermodal dispersion. (6)
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UNIT· II (a) What is phenomenon of Absorption and how it effects the propagation of light signal in fiber? Distinguish between intrinsic and extrinsic absorption. Explain how Rayleigh scattering accounts for the losses in optical fiber? (6.5) (b) The optical signal after propagating through a fiber that is lkm long is reduced to 40% of its original value. Calcul~te the fiber loss in dB. (6)
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UNIT-III (a) What are various types of LED's? Explain surface emitter LED. (6.5) (b) A photodiode has quantum efficiency of 65% when' photons of energy l.,5xlO-19J are incident on it. Determine the operating wavelength of the device. Calculate the incident power required for a photo current of 2.5j.lA. (6)
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Q7
Q8
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(a) Discuss in detail P-i-n photodiode. How does it differ from the silicon reach through avalanche photo diode? (6.5) (b) The longitudinal modes of a GaAs laser emitting at a wavelength of 0.87j.lm are separated by 278GHz. Determine the length of the optical cavity and the number of longitudinal modes emitted. The refractive index of GaAf3=3.6. (6) UNIT-IV (a) What is Medium Access Control (MAC)protocol? How this protocol is used in optical fiber communication networks? What protocols are used for token ring topologies? (6.5) (b) Explain typical application of optical fibers in (i) Military and (ii) Industries. (6) OR
Q9
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(a) Explain the features of various generation of optical fiber communication (b) Explain the principles of (i) SONET and (ii)WDM. ************
system. (6.5) (6)
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END TERM EXAMINATION SEVENTH SEMESTER B.TECH.
Paper Code: ETIT405
I
DECEMBER-2012
·-S-~-b-'.f-ec-t-:-Ni-e-t-w-o-rk-T-e-c-h-n-o-l-o-g-y-I
Time: 3 Hours Note: Attempt any five questio.ns
Quesl. (a) What is the binary network
m ofthe
Maximum Marks :75 is compulsory.
including
Q. no. 1 which
Loopback IP address?
(2 marks)
(d) What do you meanby'symm.etric",
(2 marks)
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(b) When do you use BGP, !RGP, OSPF, Static Routes ? (c) What is the size ofa query message. reque$~thedQmain
name for 185.34.23.12 ?
key:cipheN:alled:A:ES,?,
(2 marks)
(2 marks)
(e) Why 8251 is calleci;a USART:?'
(2 marks)
(f) Differentiatebetweenbitrate\andibaudrate?:
(3 marks)
FTP, SM'[P and POP3 run ontop.ofTCP
rather than on UDP?
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(g) Why doHTfP,
(3 marks)
(i) What is meant by "domain name'~? How is a domain name translated to an equivalent IP address? Explain with the help of an ((xample.
Ques2. (a) What are the type of records used in DNS? Discuss them briefly?
(3 marks)
(3marks)
{]O:1l:21:~5:EA:11.
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(b) Show the contents of all fields for'a BOOTP request packet sent from a client with.physical address
(5marks) .
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(c) An Organization is gt
length subnets.
(0 Fli."3dthesubnet mask. (ii) Find the number of addresses in each subnet 1
(iii) Find the first andla,;t address in fIrst subnet and in the last subnet.
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(b) What is Border Gateway Protocol (BGP)? Explain the functioning ofBGP.
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(6marks) (3marks)
Que53. (a) Explain various timers ured in FDDI?
(c) What are lOBase2, lOBase5 andlOBaseTEthemet
LANs?
(5marks) (6marks) (3marks)
Ques4. (a) Discuss various Tran"port Layer issues?
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(b) What is ATM Technola.gy? Explain reference model of ATM along with the various services provided by it. (5marks) (c) What is the·difference between IDN and ISDN? Explain the basic services ofISDN. Describe fIve applications ofISDN. (6marks)
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Qlles 5. (a") 'What
is overrun
(3marks)
error in 8251?
(b) What do you mean by
'MJlll -
in -the - middle attack.
(ol;) What is the difference oletween 8086 and 8251?
(5marks) (6ntarks) (3marks) (5marks)
Ques 6. (a) What do you mean by Kerberos? (b) What are the functions of SM!. (c) What is the significance of BREAK DETECT signal in 8251 ? ************
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(6marks)'
Exam Roll No ....•••....••...•..•.••
(Please write your Exam Roll No.)
END TERM EXAMINATION SEVENTH SEMESTER [B.TECH.]
[paper Code: ETEC/ETIT407 Time: 3 Hours " Note: Attempt
"_.___
Subject: Mobile Computing Maximum Marks :75
any flve questions including
Q.no.l
which is compulsory.
Q1
(a) What is the relationship between a Base Station and a Mobile Switching Centre? (2) (b) What is the maximum number of callers in each cell in a GSM? (2) (c) Mention at least four limitations/challenges that wireless LAN technology needs to overcome. (4) (d) Explain the word 'Mobile Computing' and also give any suitable live example with merit of Mobile Computing. (4) (el What are Virtual Networks? (3) (f) Why is the physical layer of IEEE 802.11 subdivided? (2) (g) What is tunneling in Mobile IP? " (3) (h) Give limitations of GPRS. (3) (i) What is frequ"ency hopping? (2)
Q2
(a) Looking at the HLR/VLR database used in GSM - how does this architecture limit the scalability in terms of users, especially moving users? (4) (b) What is ciphering in GPRS? (4) (c) Explain control channels of GSM. (4.5)
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DECEMBER-2012
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UNIT-I
OR
(a) Explain GSM system architecture (b) Explain Mobility Managem~nt.
in detail.
(8) (4.5)
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"Q3
UNIT-II
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Q7
UNIT-III
(a) What are some key advantages of WLL over a wired subscriber write limitations of WLL. (b) Explain WLL system Architecture.
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(a) What are the several requirements that accompanied that development of the mobile IP as a standard to enable mobility in the internet? (8) (b) Describe the system architecture and protocol architecture of IEEE 802.11 with suitable diagram. (4.5) OR (a) Discuss WAP security issues. (5) (b) What are the design guidelines for WAP? Explain in detail. (7.5)
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Q4
loop? Also, (6.5) (6)
OR
(al What is IMT-2000? Give 5 radio interfaces for IMT-2000. (6) (b) What is CDMA 2000 technique? Explain different types of CDMA 2000 in order of increasing complexity. (6.5)
UNIT-IV
Q8
(a) Describe Bluetooth architecture and protocol. Also, discuss its limitations. (10) (b) Give four classific~_tion of Bluetooth technology. (2.5)
Q9
(a) Give the Globalstar specification and its features. (b) Write applications of Bluetooth. (c) What is the origin of the Bluetooth technology?
OR
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(5) (5) (2.5)
