III Year DSP BITS

                            Digital Signal Processing (DSP)

                                   JNTUH Second mid Bits

                                                 UNIT-5

SECTION-I: Multiple choice questions

1.  The impulse invariant mapping and bilinear mapping are  [  d  ]

( a ) both are many-to-one mapping ( b ) both are one-to-one mapping

( c ) one- to- one and many-to-one mapping respectively

( d ) many-to-one and one- to-one mapping

2.  In Chebyshev approximation, at the cutoff frequency,the normalized magnitude response has a value of      [ a]

3.  The two properties which are preserved in analog to digital transformation are [  c  ]

( a ) linearity and stability ( b ) linearity and causality

( c ) stability and causality ( d ) time in variant and linearity

4.  A mapping from the S-Plane to the Z-Plane called [ c]

(a) Laplace Transform (b) Z-Transform (c) Bilinear Transform (d) None

5.  In which filters exhibit equiripple behavior in the pass band and a monotonic characteristics in the stop band [ b ]

(a) Butterworth (b) Type I Chebyshev (c) Type 2 Chebyshev (d) Elliptic

6.  How many types of chebyshev filters are there?   [ b  ]

(a) 4 (b) 2 (c) 3 (d) 6

7.   The digital frequency in bilinear transformation is [ b ]

8.  In chebyshev filter, the alternation constant is [a ]

9.  The ratio (Ω₂)/(Ω₁) for impulse invariant transformation is   (a)

_(a)      (W₁) / (w2)   (b) (w₁)/(w)   (c) (w)/(w₂)   (d) (w₁)/(w₂)

10.  The normalized magnitude response of chebyshev    type-I filter has a value of ________ at the cutoff frequency Ω  (c )

Section-II: Fill in the blanks

1.In impulse invariant mapping the left half poles of s-plane are mapped into

 Interior  of unit circle in z-plane

2. The poles of the butterworth transfer function symmetrically lies on an unit circle in s-lane with

angular spacing of  π/N

3. The frequency response of the Butterworth filter Decreases monotonically with  Increasing Ω and as the filter order increases, the transition band become narrower.

4. Impulse invariance method is not suitable for  HIGH PASS

5.  Bilinear Transformation can pressure the magnitude response of an analog filter, but the phase response of the analog filter cannot be pressured

6. A linear phase analog filter cannot be transformed to a linear phase digital filter using bilinear transformation.

                                                                                                Prepared by

                                                                                                                        B.SRIDHAR

ECA SECOND MID BITS

                                                                       ECA

                                                          JNTUH  second Mid BITS

                                             UNIT-5: Feedback amplifiers

SECTION-I:   Multiple choice questions

1.  Negative feedback in amplifier             [   b  ]

(a) Improves SNR at the input (b) improves SNR at the output  (c) Increases distortion (d) None of the above

2.  The gain of an amplifier with feedback is ______. [            a          ]

(a) A/1+Aβ (b) β/1+βa (c) β/1-βa (d) A/1-Aβ

3.  In voltage shunt feedback, the input impedance [   b   ]

a. increases b. decreases

c. depends on dc voltage applied d. depends on frequency of operation

4.  Which of the following combination can be used as a buffer_____ [  c ]

a. CE b. CB c. CC d. All

                   Section-II:  Fill in the blanks

1.     The Trans conductance amplifier is also called as  Series – Series amplifier (or) Current – Series amplifier

2.     In an ideal voltage amplifier, the values of R_i & R₀ are  ∞, 0

     3. The ratio of input impedance with feedback to without feedback is  1+Aβ

   

                                                                                                    Prepared By

                                                                                             Dhanalakshmi & Neelima

STLD II MID BITS

NOTE:   Don't Think That these bits will be repeated in II mid. First read the concepts then solve bits. These bits for checking your knowledge

                                                                                 STLD

                                                                      SECOND MID BITS  

                                                                          

                                                       UNIT-5(Programmable Logic devices)

1.  In programmable logic array      [            c         ]

(a) AND –array is fixed &OR- array is programmable (b) AND-array is programmable & OR-array is fixed (c) both AND &OR array are programmable (d) both AND &OR array are fixed

2.  Total no.of programmable fuses in ‘n’ input ‘m’ output PROM is [     c            ]

(a) n (b) nXm (c) 2nXm (d) 2^mXn

3.  Programming a PLD device means [  b    ]

(a) writing software program (b) blowing electronic fuses

(c) writing assembly language program (d) writing C program

4.  When power supply of ROM is switched off, its contents [   c]

(a) becomes zero (b) becomes all ones (c) remains same (d) are unpredictable

5.  The Programmable Array Logic consists of [  d ]

a) fixed OR and AND gates b) Programmable OR , fixed AND gates

c) Programmable OR and AND gates d) Programmable AND , fixed OR gates

6.  Four RAM chips of 16×4 size have their busses connected together. This system will be of size

  [  c]

a)   16×4 b) 256×1 c) 16×16 d) 32×8

7.  The parameters of a threshold element are [ a]

a) weights assigned to input variable s and T b) output variables

c) weights assigned to input variables d) value of T

8.  The address bus with a ROM of size 1024*8 bits is [ b]

a)8 bits b) 10 bits c) 12 bits d) 16 bits

9. The ROM programmed during manufacturing process itself is called [ a ]

a)MROM (b) PROM (c) EPROM (d) EEPROM

10.  A memory in which the contents get erased when power failure occurs is [ d ]

a)EAROM (b) PROM (c) ROM (d) RAM

11.  A single literal term in SOP expression [ b  ]

a)Requires an inverter for PLA implementation

b)Requires an AND gate for PLA implementation

c)Doesn’t requires an AND gate for PLA implementation

d) Doesn’t requires an inverter for PLA implementation

SECTION-II: FILL IN THE BLANKS

1. In a positive unite function all the variables are only in     Un complemented   form.

2.  Non threshold functions cannot be realized using a single threshold gate.

3. A PLA consists of  AND, OR and invert / non invert matrix

4. A ROM has 32K×8 organization. Its capacity in bits is 256 KB

5. The number of outputs of a threshold element is  1

6. A combinational PLD with programmable AND array and programmable OR array is called as PLA

7. The full form of PROM is  programmable read only memory.

                                                                                                                               Prepared by
                                                                                                                      Sowmya & Srilatha

Second mid bits

Hai All,

All subjects II year and III year     Second mid bits will be posted soon…..

Congrats to 2-1 Toppers

              

                                 Congrats to   2-1 Toppers

Hearty congratulations to ECE 2-1 toppers. All the best for 2-2 Exams

ECE-2A:

1. D.deepika-84%

2. Phanikrishna-80%

3. K.swathi-78%

4. B.Aishwarya-75%

5. v.mounika-74%

ECE-2B:

1. G.Prathusha-74%

2. Nihar-74%

3. Y.swetha-72%

4. N.Bhavani-71%

5. B.Priyanka-71%

ECE-2C:

1. Ch.Pavan-75%

2. L.Anuroop kumar-74%

3. K.swetha-73%

4. A.Bhagyavathi-73%

5. J.Fathima-73%

GATE SUBJECT WISE PREVIOUS QUESTIONS

Public Sector companies exams subject wise previous questions

Interview questions

                                C Interview questions

1.     Difference between arrays and pointers?

2.     What is the purpose of realloc( )?

3.     What is static memory allocation and dynamic memory allocation?

4.     How are pointer variables initialized?

5.     Are pointers integers?

6.     What is a pointer variable?

7.     What is a pointer value and address?

8.     What is a method?

9.     What are the advantages of the functions?

10.                        What is the purpose of main( ) function?

11.                        What is an argument? differentiate between formal arguments and actual arguments?

12.                        What is a function and built-in function?

13.                        What is modular programming?

14.                        When does the compiler not implicitly generate the address of the first element of an array?

15.                        What are the characteristics of arrays in C?

16.                        Differentiate between a linker and linkage?

17.                        What are advantages and disadvantages of external storage class?

18.                        Diffenentiate between an internal static and external static variable?

19.                        What are the advantages of auto variables?

20.                        What is storage class and what are storage variable?

21.                        Which expression always return true? Which always return false?

22.                        Write the equivalent expression for x%8?

23.                        Why n++ executes faster than n+1?

24.                        What is a modulus operator? What are the restrictions of a modulus operator?

25.                        What is the difference between a string and an array?

26.                        Is it better to use a pointer to navigate an array of values,or is it better to use a subscripted array name?

27.                        Can the sizeof operator be used to tell the size of an array passed to a function?

28.                        Is using exit() the same as using return?

29.                        Is it possible to execute code even after the program exits the main() function?

30.                        What is a static function?

31.                        Why should I prototype a function?

32.                        How do you print an address?

33.                        Can math operations be performed on a void pointer?

34.                        How can you determine the size of an allocated portion of memory?

35.                        What is a “null pointer assignment” error? What are bus errors, memory faults, and core dumps?

36.                        What is the difference between NULL and NUL?

37.                        What is the heap?

38.                        Can the size of an array be declared at runtime?

39.                        What is the stack?

40.                        When should a far pointer be used?

41.                        What is the difference between far and near?

42.                        Is it better to use malloc() or calloc()?

43.                        Why should we assign NULL to the elements (pointer) after freeing them?

44.                        When would you use a pointer to a function?

45.                        How do you use a pointer to a function?

46.                        Can you add pointers together? Why would you?

47.                        What does it mean when a pointer is used in an if statement?

48.                        Is NULL always defined as 0?

49.                        What is a void pointer?

50.                        What is a null pointer?

51.                        How many levels of pointers can you have?

52.                        What is indirection?

53.                        How do you print only part of a string?

54.                        How can I convert a string to a number?

55.                        How can I convert a number to a string?

56.                        What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used?

57.                        How can you check to see whether a symbol is defined?

58.                        How do you override a defined macro?

59.                        What is #line used for?

60.                        What is a pragma?

61.                        What are the standard predefined macros?

62.                        How can type-insensitive macros be created?

63.                        How many levels deep can include files be nested?

64.                        Can include files be nested?

65.                        Can you define which header file to include at compile time?

66.                        What is the difference between #include and #include “file”?

67.                        Is it better to use a macro or a function?

68.                        How are portions of a program disabled in demo versions?

69.                        What is the benefit of using an enum rather than a #define constant?

70.                        What is the benefit of using #define to declare a constant?

71.                        Can a file other than a .h file be included with #include?

72.                        How can you avoid including a header more than once?

73.                        What will the preprocessor do for a program?

74.                        What is a macro, and how do you use it?

75.                        What is Preprocessor?

76.                        How can I make sure that my program is the only one accessing a file?

77.                        How can I open a file so that other programs can update it at the same time?

78.                        How do you determine whether to use a stream function or a low-level function?

79.                        What is the difference between text and binary modes?

80.                        How can you restore a redirected standard stream?

81.                        How do you redirect a standard stream?

82.                        How can I search for data in a linked list?

83.                        How can I sort a linked list?

84.                        What is hashing?

85.                        What is the quickest searching method to use?

86.                        What is the easiest searching method to use?

87.                        How can I sort things that are too large to bring into memory?

88.                        What is the quickest sorting method to use?

89.                        What is the easiest sorting method to use?

90.                        What is the benefit of using const for declaring constants?

91.                        Can static variables be declared in a header file?

92.                        What is the difference between declaring a variable and defining a variable?

93.                        Is it acceptable to declare/define a variable in a C header?

94.                        When should a type cast not be used?

95.                        When should a type cast be used?

96.                        How can you determine the maximum value that a numeric variable can hold?

97.                        How reliable are floating-point comparisons?

98.                        Can a variable be both const and volatile?

99.                        When should the volatile modifier be used?

100.                   When should the register modifier be used? Does it really help?

                   Networking interview questions

1. What are 10Base2, 10Base5 and 10BaseT Ethernet LANs ?
2. What is the difference between an unspecified passive open and a fully specified passive open
3. Explain the function of Transmission Control Block
4. What is a Management Information Base (MIB)
5. What is anonymous FTP and why would you use it?
6. What is a pseudo tty?
7. What is REX?
8. What does the Mount protocol do ?
9. What is External Data Representation?
10. What is the Network Time Protocol?
11. What is a DNS resource record?
12. What protocol is used by DNS name servers?
13. What is the difference between interior and exterior neighbor gateways?
14. What is the HELLO protocol used for?
15. What are the advantages and disadvantages of the three types of routing tables?
16. What is source route?
17. What is RIP (Routing Information Protocol)?
18. What is SLIP (Serial Line Interface Protocol)?
19. What is Proxy ARP?
20. What is OSPF?
21. What is Kerberos?
22. What is a Multi-homed Host?
23. What is NVT (Network Virtual Terminal)?
24. What is Gateway-to-Gateway protocol?
25. What is BGP (Border Gateway Protocol)?
26. What is autonomous system?
27. What is EGP (Exterior Gateway Protocol)?
28. What is IGP (Interior Gateway Protocol)?
29. What is Mail Gateway?
30. What is wide-mouth frog?
31. What are Digrams and Trigrams?
32. What is silly window syndrome?
33. What is region?
34. What is multicast routing?
35. What is traffic shaping?
36. What is packet filter?
37. What is virtual path?
38. What is virtual channel?
39. What is logical link control?
40. Why should you care about the OSI Reference Model?
41. What is the difference between routable and non- routable protocols?
42. What is MAU?
43. Explain 5-4-3 rule.
44. What is the difference between TFTP and FTP application layer protocols?
45. What is the range of addresses in the classes of internet addresses?
46. What is the minimum and maximum length of the header in the TCP segment and IP datagram?
47. What is difference between ARP and RARP?
48. What is ICMP?
49. What are the data units at different layers of the TCP / IP protocol suite?
50. What is Project 802?
51. What is Bandwidth?
52. Difference between bit rate and baud rate?
53. What is MAC address?
54. What is attenuation?
55. What is cladding?
56. What is RAID?
57. What is NETBIOS and NETBEUI?
58. What is redirector?
59. What is Beaconing?
60. What is terminal emulation, in which layer it comes?
61. What is frame relay, in which layer it comes?
62. What do you meant by “triple X” in Networks?
63. What is SAP?
64. What is subnet?
65. What is Brouter?
66. How Gateway is different from Routers?
67. What are the different type of networking / internetworking devices?
68. What is mesh network?
69. What is passive topology?
70. What are the important topologies for networks?
71. What are major types of networks and explain?
72. What is Protocol Data Unit?
73. What is difference between baseband and broadband transmission?
74. What are the possible ways of data exchange?
75. What are the types of Transmission media?
76. What are the types of Transmission media?
77. What is point-to-point protocol?
78. What are the two types of transmission technology available?
79. Difference between the communication and transmission?
80. What is a different between switch and Hub?
81. What are the Advantages and Disadvantages of DHCP?
82. What is Recovery Console?
83. What is ERD(Emergency Repair Disk)?
84. What is the difference between POP3 and IMAP Mail Server?
85. what is .ost file?
86. Whatz the difference between DNS and WINS?
87. How can we create VPN to connect to branch office of the same office.what would be the priliminary requirment?
88. Why should we care about the OSI Reference Model ? What is the main purpose for creating this osi model? why it is a layered model?
89. What is layer-3 switch?
90. What is an email client? what is differnce between email client and web mail?
91. what is the vlan ? how it is work?
92. Name three network tools used to determine where a network connectivity is lost between two sites A&B.
93. Which protocol is used for retrieving mails?
94. What is piggy backing?
95. What is the default subnet mask for an ipv6 address ?
96. What is fragmentation of a packet ?
97. What is MTU of a link ?
98. Name any field of IP header that can prevent a packet to loop infinitely ?
99. Under what situations a packet can go into infinite loop in a network ?
100. Describe a 3-way TCP/IP Handshake.

                    8085 Microprocessor questions

1. What are the various registers in 8085? - Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085 .
2. In 8085 name the 16 bit registers? - Stack pointer and Program counter all have 16 bits.
3. What are the various flags used in 8085? - Sign flag, Zero flag, Auxillary flag, Parity flag, Carry flag.
4. What is Stack Pointer? - Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
5. What is Program counter? - Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
6. Which Stack is used in 8085? - LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
7. What happens when HLT instruction is executed in processor? - The Micro Processor enters into Halt-State and the buses are tri-stated.
8. What is meant by a bus? - A bus is a group of conducting lines that carriers data, address, & control signals.
9. What is Tri-state logic? - Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
10. Give an example of one address microprocessor? - 8085 is a one address microprocessor.
11. In what way interrupts are classified in 8085? - In 8085 the interrupts are classified as Hardware and Software interrupts.
12. What are Hardware interrupts? - TRAP, RST7.5, RST6.5, RST5.5, INTR.
13. What are Software interrupts? - RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
14. Which interrupt has the highest priority? - TRAP has the highest priority.
15. Name 5 different addressing modes? - Immediate, Direct, Register, Register indirect, Implied addressing modes.
16. How many interrupts are there in 8085? - There are 12 interrupts in 8085.
17. What is clock frequency for 8085? - 3 MHz is the maximum clock frequency for 8085.
18. What is the RST for the TRAP? - RST 4.5 is called as TRAP.
19. In 8085 which is called as High order / Low order Register? - Flag is called as Low order register & Accumulator is called as High order Register.
20. What are input & output devices? - Keyboards, Floppy disk are the examples of input devices. Printer, LED / LCD display, CRT Monitor are the examples of output devices.
21. Can an RC circuit be used as clock source for 8085? - Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal.
22. Why crystal is a preferred clock source? - Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
23. Which interrupt is not level-sensitive in 8085? - RST 7.5 is a raising edge-triggering interrupt.
24. What does Quality factor mean? - The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
25. What are level-triggering interrupt? - RST 6.5 & RST 5.5 are level-triggering interrupts.