MCA PART A.docx

**PART A** 1. The basic element of a memory is FLIP-FLOP. 2. If a microprocessor has 'n' address lines, then it can directly address \_\_\_\_\_\_\_\_ memory locations.= 2\^n 3. To store programs and data \_\_\_\_\_\_\_\_is used. Memory 4. The group of Registers is RAM, ROM. 5. The vola...

**PART A** 1. The basic element of a memory is FLIP-FLOP. 2. If a microprocessor has 'n' address lines, then it can directly address \_\_\_\_\_\_\_\_ memory locations.= 2\^n 3. To store programs and data \_\_\_\_\_\_\_\_is used. Memory 4. The group of Registers is RAM, ROM. 5. The volatile memory is RAM 6. The signal used to write the data into RAM location is.WR\' 7. How many no. of locations are available in 4\*8-bit Register 4 8. If the microcontroller have 16 address lines, then the ROM capacity is 65536 9. How many address lines are required for accessing 1kB of ROM? 10 10. What is Microprocessor? A multipurpose PLD that accepts binary data as input 11. The heart of of CPU is Microprocessor 12. Which type of signal is required constantly for Microprocessor? Pulse Wave 13. The devices that provide the means for a computer to communicate with the user or other computers are referred to as: I/O 14. The unit which generates control signals which are necessary for execution of an instruction is Control Unit 15. Which of the following is an 8-bit MICROCONTROLLER IC? IC 8051 16. Which architecture provides separate buses for program and data memory? Harvard Architecture 17. A microcontroller at-least should consist of: CPU, On-chip RAM, On-chip ROM, I/O ports and timers 18. What is the most appropriate criterion for choosing the right microcontroller of our choice? Speed, Availability,Ease with the product 19. Why microcontrollers are not called general purpose computers? Because they design to perform dedicated task 20. The microcontrollers based on memory classified into \_\_\_\_\_\_8 bit, 16 bit, 32 bit,Embedded memory, external memory,RISC, CISC 21. In embedded memory microcontroller has Programs, data,Counters, timers,Input/ Output Ports 22. The microcontrollers are used in Computers, laptops, television,Printers, refrigerators,Microwave owens 23. The speed of the microcontrollers are Slow 24. Which parameters are required to select the microcontroller?Bit Size,Clock Speed,Memeory Size 25. How does the microcontroller communicate with the external peripherals / memory? via I/O Ports 26. Which of the following should a microcontroller at-least should consist of? CPU, RAM, ROM, I/O ports, and timers 27. Which of the following features are suitable for Mircoprocessor? CISC Processo 28. Von-Neumann Architecture,Multi-Tasking 29. Which of the following features are suitable for Mircocontroller? CISC Processor 30. Harvard Architecture,Dedicated Task 31. Which of the following is application of Mircocotroller? Temperature Control System 32. Which of the following technology was used by Intel to design its first 8-bit microprocessor? PMOS 33. The \_\_\_\_\_\_\_\_\_\_ controls the flow of data and instructions within the computer. control unit 34. 8085 is a \_\_\_\_\_\_ bit microprocessor. 8 35. 2nd generation Microcoprocessors are fabricated with \_\_\_\_\_\_\_\_\_\_\_\_ technology. NMOS 36. 3rd generation Microcoprocessors are fabricated with \_\_\_\_\_\_\_\_\_\_\_\_ technology. HMOS 37. 3rd generation Microcoprocessors are \_\_\_\_\_\_\_ bit processors. 16 38. 4th generation Microcoprocessors are \_\_\_\_\_\_\_ bit processors. 32 39. 5th generation Microcoprocessors are \_\_\_\_\_\_\_ bit processors. 64 40. IC 80386 Microcoprocessor are fabricated with \_\_\_\_\_\_\_\_\_\_\_\_ technology. HCMOS 41. Pentium Microcoprocessors belongs to \_\_\_\_\_\_\_ generation microprocessorsFifth 42. A memory IC with 10 address lines pins will have \_\_\_\_\_\_\_memory locations. 102400 43. A byte has \_\_\_\_\_\_ no.of nibbles.2 44. A word binary data has \_\_\_\_\_\_ no. of bytes. 2 45. The address range of a 16Kb memory is0000-3FFF 46. A memory IC with 8 address lines pins will have \_\_\_\_\_\_\_memory locations. 256 47. An 8Kb EPROM requires \_\_\_\_\_\_\_address lines. 13 48. memory IC with 10 address lines pins will have \_\_\_\_\_\_\_memory locations. 1024 49. For a 64Kb memory the memory address range is from \_\_\_\_\_\_\_\_ to \_\_\_\_\_\_\_\_\_0000-FFFF 50. For a 32Kb memory the memory address range is from \_\_\_\_\_\_\_\_ to \_\_\_\_\_\_\_\_\_0000-7FFF 51. An 4Kb EPROM requires \_\_\_\_\_\_\_address lines. 12 52. EA stands for \_\_\_\_\_\_\_External Access 53. 8051 is a \_\_\_\_\_\_ pin controller IC. 40 54. The size of data bus in 8051 is \_\_\_\_.8 bit 55. The size of address bus in 8051 is \_\_\_\_16 bit 56. The accumulator size in 8051 is \_\_\_\_\_ bit. 8 biT 57. The size of DPTR in 8051 is \_\_\_\_.16 BIT 58. The program counter in 8051 is \_\_\_\_ bit wide. 16 bit 59. Stack pointer size in 8051 is \_\_\_\_\_\_\_.8 bit 60. PSW stands for \_\_\_\_.Program Status Word 61. If EA=VCC in 8051, then \_\_\_\_\_\_\_\_Internal Memory is Selected 62. ALE stands \_\_\_\_\_.Address Latch Enable 63. PSEN stands for Program Store Enable 64. The ALU size in 8051 is \_\_\_\_\_bit. 8 65. To select external memory in 8051 \_\_\_\_\_\_ pin is used. EA 66. In 8051,After reset, SP register is initialized to address\_07H 67. To initialize any port as an output port what value is to be given to it? 0x00 68. How many Parallel I/O Ports are available in 8051 microcontroller? Four 69. Which out of the four I/O ports of 8051 needs a pull-up resistor for using it is as an input or an output port? PORT 0 70. Which of the I/O ports act as the 16 bit address lines for transferring data through it? PORT 0 & PORT 2 71. What happens when the pins of port 0 & port 2 are switched to internal ADDR and ADDR / DATA bus respectively while accessing an external memory? Ports cannot be used as general-purpose Inputs / Outputs 72. Which of the I/O ports is known as having MULTI-FUNCTION I/O PORT? PORT 3 73. Which of the I/O ports will function as SIMPLE I/O PORT? PORT 1 74. What is the RAM Address / Location of Port 0? 80h 75. What is the RAM Address / Location of Port 2? A0h 76. An alternate function of port pin P3.4 in the 8051 isTimer 0 77. To initialize any port as an output port what value is to be given to it? By default all are Output Ports 78. The on-chip ROM size in the 8051 microcontroller is4 kBytes 79. The on-chip RAM size including SFR Memory area in the 8051 microcontroller is \_\_\_\_\_\_\_\_\_\_256 Bytes 80. The on-chip ROM in the 8051 microcontroller is0000h to 0FFFh 81. The on-chip RAM Address Range EXCLUDING SFR Memory area in the 8051 microcontroller is00 - 7Fh 82. The on-chip RAM Address Range ALLOTTED for SFR Memory area in the 8051 microcontroller is80h -- FFh 83. The Bit-Addressable on-chip RAM Address Range in the 8051 microcontroller is \_\_\_\_\_\_\_\_20 - 2Fh 84. The Scratch Pad or General purpose on-chip RAM Address Range in the 8051 microcontroller is30h to 7Fh 85. The General Purpose Registers or Bank Rgeisters on-chip RAM Address Range in the 8051 microcontroller is \_\_\_\_\_\_\_\_00h - 1Fh 86. How many bytes of Bit-Addressable Area of ON-CHIP RAM locations are allotted in 8051 microcontroller? 16 bytes 87. How many bytes of Scratch Pad On-chip RAM Area locations are allotted in 8051 microcontroller? 80 bytes. 88. PIC stand for PERIPHERAL INTERFACE CONTROLLER. 89. PIC can be write-erase as many times as possible because it uses FLASH memory tech. 90. It has a total number of 40 pins and there are 33 pins for input and output. 91. PIC has RISC cpu,35 instruction set and 20MHZ operating frequency. 92. 368 of RAM (data memory), 256 of EEPROM (data memory), 8kB program memory of flash memory. 93. It has 2 CCP(16 bit),10 bit of 8 channel of A/D converter,3 timer(T0=8 bit,T1-16 bit,T2=8 bit),5 input output port(A=5 PIN,B=8 PIN,C=8 PIN,D=8PIN,E=3 PIN). 94. Operating voltage range (2.0 -- 5.56) volts current 25mA. 95. RC6/TX pin is used for transmitter 96. MSSP stands for Master slave serial port. 97. The I2C and SPI protocols are related to serial communication. 98. The total number of pins PIC16F877A has \_40 99. MCLR stands for Master clear. 100. Which is the TIMER0 external clock input pin 14 101. Which command enables the PIC to enter into the power down mode during the operation of watchdog timer(WDT) sleep. 102. Which condition/s of MCLR (master clear) pin allow to reset the PIC? pin low 103. The RPO status register bit has the potential to determine the effective address of Direct Addressing Mode 104. Which flags are more likely to get affected in status registers by Arithmetic and Logical Unit of PIC 16F877A on the basis of instructions execution All the above. 105. When do the special address 004H get automatically loaded into the program counter? At the occurrence of interrupt into the program counter 106. Which register acts as an input-output control as well as data direction register for PORTA in bank 2 of DATA MEMORY ?  TRISA (85H) 107. Which timer can be used for both prescaler and postscaler?TIMER 2 108. Indirect addressing is done through \_\_\_\_\_\_\_ 109. W register is \_\_8\_\_ bit wide. 110. \_\_\_\_\_\_\_ SFR used to show the current status of PIC16F877A. 111. In the PIC16F877A microcontroller has total \_\_33\_\_\_ I/O pins 112. TIMER USES\_\_\_TIME INTERVAL\_\_\_\_ FOR ITS OPERATION 113. WHAT IS THE EXCEUTION SPEED OF INSTRUCTIONS IN PIC ESPECIALLY WHILE OPERATING AT THE MAXIMUM VALUE OF CLOCK RATE **0.2 μs.** 114. WHAT IS THE PURPOSE OF USING THE START UP TIMERS IN AN OSCILLATOR CIRCUIT OF PIC **For ensuring the inception and stabilization of an oscillator in a proper manner** 115. HOW MANY BITS DATA CAN HOLD IN TIMER0 8 BIT 116. In PIC,\_\_GPIO\_\_\_\_\_ is used to check the microcontroller is functioning properly or not. 117. Which timer/s possess an ability to prevent an endless loop hanging condition of PIC along with its own on-chip RC oscillator by contributing to its reliable operation?WDT 118. \_\_\_WDT\_\_\_ is used to prevent the processor from the end less loop. 119. Generation of Power-on-reset pulse can occur only after **On-chip detection circuit. ** 120. Power saving mode in PIC is \_\_sleep mode\_\_\_\_