2. A chemical transduction system is interfaced to the optical fibre at its end. This type of sensor is called?
Correct : A. chemical sensor
3. The register that may be used as an operand register is
Correct : D. accumulator and b register
4. The register that can be used as a scratch pad is
Correct : B. b register
5. Which of the processor’s stack does not contain the top-down data structure?
Correct : C. 8051
6. The architecture of 8051 consists of
Correct : D. all of the mentioned
7. The transmit buffer of serial data buffer is a
Correct : B. parallel-in serial-out register
8. The receive buffer of serial data buffer is a
Correct : A. serial-in parallel-out register
9. The register that provides control and status information about counters is
Correct : B. tmod
10. The register that provides control and status information about serial port is
Correct : D. pcon and scon
11. The device that generates the basic timing clock signal for the operation of the circuit using crystal oscillator is
Correct : C. oscillator
12. The registers that are not accessible by the user are
Correct : D. tmp1 and tmp2
13. In which of these modes, the immediate operand is included in the instruction itself?
Correct : B. immediate operand mode
14. In register address mode, the operand is stored in
Correct : D. all of the mentioned
15. In which of the following addressing mode, the offset is obtained by adding displacement and contents of one of the base registers?
Correct : C. based mode
16. In which of the following addressing mode, the offset is obtained by adding displacement, with the contents of SI?
Correct : D. indexed mode
17. The address of a location of the operand is calculated by adding the contents of any of the base registers, with the contents of any of index registers in
Correct : B. based indexed mode
18. Which of the following is not a data type of 80286?
Correct : D. none of the mentioned
19. The representation of 8-bit or 16-bit signed binary operands using 2’s complement is a data type of
Correct : D. integer
20. The instruction that pushes the general purpose registers, pointer and index registers on to the stack is
Correct : C. push*a
21. While executing the PUSH*A instruction, the stack pointer is decremented by
Correct : B. 2 bits
22. The statement that is true for the instruction POP*A is
Correct : D. all of the mentioned
23. The instruction that multiplies the content of AL with a signed immediate operand is
Correct : C. imul
24. The instruction that represents the ‘rotate source, count’ is
Correct : D. all of the mentioned
25. 8051 microcontrollers are manufactured by which of the following companies?
Correct : D. all of the mentioned
26. AT89C2051 has RAM of:
Correct : A. 128 bytes
27. 8051 series has how many 16 bit registers?
Correct : A. 2
28. When 8051 wakes up then 0x00 is loaded to which register?
Correct : C. pc
29. When the microcontroller executes some arithmetic operations, then the flag bits of which register are affected?
Correct : A. psw
30. How are the bits of the register PSW affected if we select Bank2 of 8051?
Correct : D. psw.3=0 and psw.4=1
31. If we push data onto the stack then the stack pointer
Correct : A. increases with every push
32. How many bytes of bit addressable memory is present in 8051 based microcontrollers?
Correct : C. 16 bytes
33. Programmable peripheral input-output port is another name for
Correct : B. parallel input-output port
34. Port C of 8255 can function independently as
Correct : C. either input or output ports
35. All the functions of the ports of 8255 are achieved by programming the bits of an internal register called
Correct : C. control word register
36. The data bus buffer is controlled by
Correct : B. read/write control logic
37. The input provided by the microprocessor to the read/write control logic is
Correct : D. all of the mentioned
38. The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is
Correct : C. 3-state bidirectional buffer
39. The port that is used for the generation of handshake lines in mode 1 or mode 2 is
Correct : D. port c upper
40. If A1=0, A0=1 then the input read cycle is performed from
Correct : B. port b to data bus
41. The pin that clears the control word register of 8255 when enabled is
Correct : C. reset
42. Which of the following steps detects the key in a 4*4 keyboard matrix about the key that is being pressed?
Correct : D. all of the mentioned
43. To detect that in which column, the key is placed?
Correct : D. all of the mentioned
44. In reading the columns of a matrix, if no key is pressed we should get all in binary notation
Correct : B. 1
45. If we need to operate a key of a keyboard in an interrupt mode, then it will generate what kind of interrupt?
Correct : B. ex0/ex1
46. To identify that which key is being pressed, we need to:
Correct : B. ground pins of the port one at a time
47. Key press detection and Key identification are:
Correct : B. two different works are done in keyboard interfacing
48. How many rows and columns are present in a 16*2 alphanumeric LCD?
Correct : D. rows=2, columns=16
49. Which pin of the LCD is used for adjusting its contrast?
Correct : C. pin no 3
50. For writing commands on an LCD, RS bit is
Correct : B. reset
51. Which command of an LCD is used to shift the entire display to the right?
Correct : A. 0x1c
52. Which command is used to select the 2 lines and 5*7 matrix of an LCD?
Correct : D. 0x38
53. Which of the following step/s is/are correct for sending data to an LCD?
Correct : D. all of the mentioned
54. Which of the following step/s is/are correct to perform reading operation from an LCD?
Correct : C. low to high pulse at e pin & r/w pin is set high
55. Which instruction is used to select the first row first column of an LCD?
Correct : C. 0x80
56. The RS pin is for an LCD.
Correct : A. input
57. A thermistor is a
Correct : C. transducer
58. What is the difference between LM 34 and LM 35 sensors?
Correct : B. one’s output voltage corresponds to the fahrenheit temperature and the other corresponds to the celsius temperature
59. An electronic device which converts physical quantity or energy from one form to another is called
Correct : C. transducer
60. What is signal conditioning?
Correct : B. conversion or modification is referred to as conditioning
61. What steps have to be followed for interfacing a sensor to a microcontroller 8051?
Correct : B. interface sensor with adc and adc with 8051
62. Why Vref is set of ADC0848 to 2.56 V if analog input is connected to the LM35?
Correct : A. to set the step size of the sampled input
63. A variable reluctance stepper motor is constructed of material with salient poles.
Correct : B. ferromagnetic
64. A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of- pps.
Correct : C. 6000
65. If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be
Correct : A. 4
66. The rotor of a stepper motor has no
Correct : D. all of the mentioned
67. The rotational speed of a given stepper motor is determined solely by the
Correct : B. step pulse frequency
68. Which of the following phase switching sequence represents half-step operation of a VR stepper motor ?
Correct : D. a, ab, b, bc……..
69. What is the first phase of traffic regulation?
Correct : A. driver controls
70. What is the step angle of a permanent- magnet stepper motor having 8 stator poles
Correct : D. traffic population
71. The minimum age for attaining a license for a geared vehicle is?
Correct : B. 18 years
72. Traffic symbols are classified into how many categories?
Correct : C. three
73. The symbol when violated which may lead to offense is?
Correct : B. mandatory
74. Which of the following is a disadvantage in one way traffic?
Correct : D. more chances of overtaking
75. The total conflict points at a junction on both two way roads are?
Correct : D. six
76. The maximum number of conflict points is formed in
Correct : D. two way regulation on both roads
77. The specifications for road signs are specified by
Correct : C. irc 67
78. The diameter of the small size information board is?
Correct : A. 600mm
79. Which type of board should be installed if the speed limit is 100kmph?
Correct : C. large
80. Give way sign is of
Correct : A. triangular shape
81. STOP sign is having
Correct : A. octagonal shape
82. The clearance time is indicated by
Correct : B. amber
83. converts the programs written in assembly language into machine instructions.
Correct : C. assembler
84. The instructions like MOV or ADD are called as
Correct : A. op-code
85. Instructions which won’t appear in the object program are called as
Correct : D. assembler directives
86. The assembler directive EQU, when used in the instruction: Sum EQU 200 does
Correct : B. replaces every occurrence of sum with 200
87. The purpose of the ORIGIN directive is
Correct : A. to indicate the starting position in memory, where the program block is to be stored
88. The directive used to perform initialization before the execution of the code is
Correct : C. dataword
89. directive is used to specify and assign the memory required for the block of code.
Correct : D. reserve
90. directive specifies the end of execution of a program.
Correct : B. return
91. The last statement of the source program should be
Correct : D. end
92. When dealing with the branching code the assembler
Correct : C. finds the branch offset and replaces the branch target with it
93. The assembler stores all the names and their corresponding values in
Correct : B. symbol table
94. The assembler stores the object code in
Correct : D. magnetic disk
95. The utility program used to bring the object code into memory for execution is
Correct : A. loader
96. To overcome the problems of the assembler in dealing with branching code we use
Correct : D. two-pass assembler
97. A register is defined as
Correct : D. the group of flip-flops suitable for storing binary information
98. How many types of registers are?
Correct : C. 4
99. The main difference between a register and a counter is
Correct : A. a register has no specific sequence of states