Microcontroller Objective Questions and Answers For Exam Purposes

 

Q1. What kind of instructions usually affect the program conter?

a. Call and Return 

b. Push and Pop 

c. Return and Jump 

d. Call and Jump 

Ans- d 

Q2. If we say microcontroller is 8 bit then here 8 bit denotes size of 

a. ALU 

b. Data Bus 

c. Control Bus 

d. Address Bus 

Ans-A 

Q3. Which of the following function related to stack?

a. Push and Pop 

b. None 

C. Call and Return

d. Both push pop and call return 

Ans- a 

Q4. Which of the following is used for storing flags register?

a. Status register

b. Control register 

c. Buffer register 

d. None 

Ans- Status register

Q5. Which of the following is not a special function register?

a.Stack pointer 

b. Accumulators

c. Instructions pointer 

d. Program Conter

Ans-b 

Q6. The device that enables the microprocessor to read data from the external devices is 

a. Display 

b. Printer 

c. Reader 

d. Joystick 

Ans- d 

Q7. The open drain by directional (input and output) port with internal pullups is 

a. Port 3

b. Port 1

c. Port 0 

d. Port 2.

Ans- C 

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Q8. Which of the following is correct for microprocessor Intel 8085?

a. 32 bit microprocessor

b. 8 bit microprocessor

c. 4 bit microprocessor

d. 16 bit microprocessor

Ans- b 

Q9. 8085 microprocessor is an 8 bit microprocessor designed by 

a. IBM 

b. Dell 

c. Intel 

d. Vax 

Ans- C 

Q10. The instructions, JMP 5000H : 2000H ;is an example of 

a. Intrasegment direct mode 

b. Intersegment direct mode 

C. Intersegment indirect mode 

d. Intrasegment indirect mode 

Ans- b 

Q11. The instructions, MOV AX, [BX] is an example of 

a. Register addressing mode.

b. Register relative addressing mode.

c. Register Indirect addressing mode 

d. Direct addressing mode.

Ans- c.

Q12. NMI stands for 

a. Nonmovable interrupt.

b. Non maskable interrupt. 

c. Non multiple interrupt.

d. None of the mentioned 

Ans- b 

Q13. Which of the following microcontroller is used in engine management system?

a. Intel 8086

b. MC68HC05 

C. MC68HC11 

d. Intel 80286 

Ans- c 

Q14.What does CCR stands for 

a. Complex code register 

b. Computing code register 

c. Condition code register 

d. Code control register 

Ans- c 

Q15.How an embedded system communicate with the outside world?

a. Peripherals

b. Input 

C. Output 

d. Memory 

Ans- a.

Q16. Which is the concatenated register of MC68HC11?

a. X 

b. DI 

c. D 

d. IP 

Ans- C 

Q17. The INTR interrupt may be masked using the flags 

a. Sign flag 

b. Overflow flag 

c. Directional flag 

d. Interrupt flag 

Ans- d 

Q18. Which of the following is not data copy/ transfer instructions? 

a. DAS 

b. PUSH 

c. MOV 

d. POP 

Ans- a 

Q19. Which of the following is an example of embedded memory micro controller ? 

a. Intel 8031 

b. Intel 8085 

c Intel 8081 

d. Intel 8051 

Sol- d 

Q20. Which is the first microcontroller?

a. Arm 

b. 8051

c. Intel 4004 

d. TMS 1000.

ANS- d.

Q21. What is the reason for the need of high speed DSP? 

a. High sampling frequency

b. Better processing capabilities 

c. Easy programmable.

d. Less power consumption at higher speeds.

Ans- a.

Q22. What is the program that is used to speed the spectrum analysis process?

a. FGPA 

b. Fast Fourier transform

c. FDFT 

d. DDFT 

Ans- b 

Q23. In recursion the condition for which the function will stop calling itself is -------

a. Base case 

b. Best case 

C. There is no such conditions 

d. Worst case 

Ans- a 

Q24. Which among the following helps to create a temporary instance? 

a. Implicit to a parameterized constructor.

b. Implicit call to a default constructor.

C. Explicit call to a copy constructor.

d. Explicit call to a constructor.

Ans- d.

Q25. Which among the following can be viewed as combination of abstraction of data and code 

a. Interfaces 

b. Object 

c. Class 

d. Inheritance 

Ans- b 

Q26. Class is ,________   abstraction? 

a. Real 

b. Hypothetical 

c. Logical 

d. Object 

Q27. A freeware GNU debugger is ______ 

a. FDB 

b. GDB 

c. GNB 

d. FNB 

Sol- b 

Q28. Which among the following is called first , automatically, whenever an object is created ? 

a. Constructor 

b. New 

C. Trigger 

d. Class 

Ans- a 

Q29.Recursion is similar to which of the following ?

a. Switch case.

b. If elif else 

c. Loop 

d. If- else 

Ans- loop 

Q30. Using higher degree of abstraction ______.

a. Can be safer 

b. May get unsafe 

c. Both 

d. Can increase vulnerability.

Ans- a 

Q31 Push , pop mechanism is seen in 

a. Memory

b. Register 

c. Index Register 

d. Stack Pointer 

Ans- d 

Q32. How many types of constructor are available in general , in general ,in any language?

a. 5 

b. 2.

c. 4 

d. 3

Ans- d 

Q33. Which of the following comes under the Indexed addressing mode? 

a. MOVX A,@DPTR 

b.MOVC@A+DPTRA 

c. MOV @RO,A 

d. MOV A, RO 

Ans- b 

Q34. It retains its content when power is removed what type of memory is ?

a. RAM 

b. SRAM 

c. Non-volatile memory 

d. Volatile memory 

Ans- C.

Q35. How many clock pulses are confined by each machine cycle of peripherals interfaces  controllers? 

a. 12 

b. 16 

c. 8 

d. 4 

Ans- 4

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Q36. When the microcontroller executes some arithmetic operations then the flag bytes of which register are affected? 

a. SP 

b. PSW 

c. DPTR 

d. PC 

Ans- b 

Q37. The number of priority levels that each interrupt of 8051 have is 

a. 1

b. 4 

c. 2

d. 3

Ans- c 

Q38. Which one of the following is an asynchronous communication channel 

a. MUDS 

b. MOO 

c. VOIP 

d. SPI 

Ans- b 

Q39. Push pop mechanism is seen in ___.

a. Memory 

b. Stack Pointer 

c. Index Register

d. Register 

Ans- b. 

Q40. 8051 series has how many 16 bit register?

a. 1

b. 3 

c. 2 

d. 4 

Ans- c 

Q41. How many bytes of bit addressable memory is present in 8051 based microcontroller? 

a.16 bytes 

b. 32 bytes 

c. 128 bytes 

d. 8 bytes 

Ans- a.

Q42. Which among the cpu registers PIC of 16C6X/7X is not 8 bit wide? 

a. File selection register (FSR) 

b. Status Register 

c. Program counter latch register 

d. Program Conter low byte register 

Ans-c 

Q43. AT89C2051  has RAM of 

a. 64 bytes 

b. 512 bytes 

c. 128 bytes 

d. 256 bytes 

Ans- c 

Q44. 8085 microprocessor has 5 hardware interrupts 

a.TRAP, RST6.5 

b. RST 7.5 , RST 5.5 

c. INTR 

d. All 

Ans- d 

Q45. Counters and time delays can be designed using 

a. CPI 

b. Software 

c. Instructions 

d. All 

Ans-  c

Q46. Which window function is also regarded as "Raised- cosine windows"?

a. Blackman window.

b. Banning window.

c. Hamming window 

d. Bartlett window.

Ans- c 

Q47. DFT is applied to 

a. Continuous infinite signals.

b. Continuous finite sequence 

c. Finite discrete sequence 

d. Infinite sequence

Ans= c 

Q48. What is reason for the need of high speed DSP ?

a. Less power consumption at higher speeds.

b. High sampling frequency 

c. Easily programmable 

d. Better processing capabilities 

Ans- b.

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Q49.which of the following is not possible when the signal is analog?

a. Modulation 

b. Equalization 

c. Phase shifting 

d. Data compression 

Ans- d 

Q50. ROC does not have 

a. Poles 

b. Negative values 

c. Postive values 

d. Zeros 

Ans- a 

Q51. The nonlinear difference equation are solved using 

a. Cobweb models 

b. Interactive model 

c. Phase digram 

d. Power series method 

Ans- c 

Q52. Reduction in the number of binary words required to represent an analog signal is called 

a. Undersampling 

b. Data compression 

c. Data minimisation 

d. Over sampling 

Ans- b 

Q53. A filter is said to be linear phase filter if the phase delay and the group delay are __________

a. High 

b. Constant 

c. Moderate 

d. Low 

Ans- b 

Q54.

what happens after the signal is passed through the analog to digital converter in a DSP ?

a. Amplified 

b. Attenuated

c. Change back to analog 

d. Stored in a RAM. 

Ans- d 

Q55. 

One dimensional signal is a function of 

a. Single independent variable.

b. Multiple dependent variables 

c. Single dependent variables 

d. Multiple independent variables 

Ans- a 

Q56. The partial fraction of (x^2+1)/ x(x-1)^2 is 

a. 1/(x-1) + 2/(x-1)^2 - 3/x 

b. 1/(x-1) + 2/(x-1)^2 - 1/x 

c. Both 

d. None 

Ans- b 

Q57. A signal x[n] is anti symmetric or odd when 

a. X[n] = [x[n]]2

b. X[-n] = - x[n] 

C. Only b 

d. Both a and b 

Ans- c.

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