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1 and Microcontrollers - - Unit 3... X reviewer2@nptel.iitm.ac.in Courses» and Microcontrollers Unit 3 - Week 2 Announcements Course Ask a Question Progress Mentor Course outline How to access the portal Week 2 Assignment The due date for submitting this assignment has passed. Submitted assignment Due on , 23:59 IST. Week 1 Week 2 A project of Lecture 7 : Lecture 8 : Lecture 9 : Lecture 10 : Lecture 11 : Week 2 Lecture Slides Quiz : Week 2 Assignment Feedback for week 2 Week 2 Assignment Answers 1) Which of the following statements regarding a microcomputer, a microprocessor, and a microcontroller is TRUE? A microcomputer is a computer on a single chip with a microprocessor, a memory unit, and I/Os. A microcontroller is a computer on a single chip with a microcomputer, a memory unit and I/Os. A microprocessor is a computer on a single chip with an ALU, register circuits and control circuits. All of the remaining options. A microprocessor is a computer on a single chip with an ALU, register circuits and control circuits. 2) Which of the following definition best suits a microprocessor? A microprocessor is a programmable device that takes in numbers, processes them using a defined instruction set according to the program stored in the memory unit and produces other numbers as a result. A microprocessor is a non-programmable device that takes in numbers, processes them using a defined instruction set according to the program stored in the memory unit and produces other numbers as a result. A microprocessor is a non-programmable device that takes in characters, processes them using a defined instruction set according to the program stored in the registers and produces other characters as a result. A microprocessor is a programmable device that takes in numbers, processes them using a defined instruction set according to the program stored in the registers and produces other numbers as a result NPTEL - Privacy & Terms - Honor Code - FAQs - In association with Funded by 1 of 5 Wednesday 16 May :56 PM

2 and Microcontrollers - - Unit 3... Week 6 Week 7 Week 8 Week 9 Week 10 Week 11 Week 12 DOWNLOAD VIDEOS other numbers Powered as a byresult. 3) Which of the following relations among bits, nibbles, bytes, and words for an 8086 microprocessor is a valid one? 1 byte = 8 bits; 1 nibble = 4 bits; 1 word = 2 nibbles; 1 long-word = 4 nibbles 1 byte = 2 nibbles; 1 word = 2 nibbles; 1 nibble = 2 bytes; 1 long-word = 4 bytes 1 byte = 2 nibbles; 1 word = 2 bytes; 1 long-word = 8 nibbles; 1 nibble = 4 bits 1 byte = 4 bits; 1 nibble = 2 bytes; 1 word = 4 nibbles; 1 long-word = 8 bytes 1 byte = 2 nibbles; 1 word = 2 bytes; 1 long-word = 8 nibbles; 1 nibble = 4 bits 4) What is meant by ALU? Automatic Local Unit Arithmetic Logic Unit Automatic Logic Unit Arithmetic Local Unit Arithmetic Logic Unit 5) The types of buses present in the microprocessor are Control bus, address bus, and data bus Address bus, data bus, control bus, and power bus Address bus and data bus Address bus, control bus, and power bus Control bus, address bus, and data bus 6) Why do we call the microprocessor as an 8-bit microprocessor? It has an 8-bit control bus It has an 8-bit data bus It has an 8-bit address bus None of the given options It has an 8-bit data bus 7) What is the difference between MOV and MVI instructions of an microprocessor? MVI instruction copies data between two registers, whereas MOV instruction transfers an immediate data into a register. MOV instruction copies data between two registers, whereas MVI instruction 2 of 5 Wednesday 16 May :56 PM

3 and Microcontrollers - - Unit 3... transfers an immediate data into a register. Both MOV and MVI instructions transfer an immediate data into a register. Both MOV and MVI instructions copy data between two registers. MOV instruction copies data between two registers, whereas MVI instruction transfers an immediate data into a register. 8) If the sign flag is set to ZERO in an microprocessor, it means the following. The number stored in the accumulator is a non-zero number. The number stored in the accumulator is a positive number. None of the other options. The number stored in the accumulator is a negative number. The number stored in the accumulator is a positive number. 9) Which of the following is TRUE about a read bit? Can be read and written by the CPU Can be read and written by the peripherals Can be read by peripheral and written by the CPU Can be read by the CPU and written by the peripherals Can be read by the CPU and written by the peripherals 10) What is an OP code? All of the other options Instructs the CPU Stores data Translates mnemonic Instructs the CPU 11) After the execution of the instruction XRA A the contents of A, carry and zero flags are respectively A = 00, CY = 0, Z = 0 A = 00, CY = 1, Z = 0 A = 00, CY = 0, Z = 1 A = 00, CY = 1, Z = 1 3 of 5 Wednesday 16 May :56 PM

4 and Microcontrollers - - Unit 3... A = 00, CY = 0, Z = 1 12) The content of the accumulator after the execution of the following set of instructions is MVI A, 95 ANI F0H ) A program that uses mnemonics is called Object program Fetch cycle Micro instruction Assembly language Assembly language 14) An RRC instruction in microprocessor instruction set will affect S flag Z flag CY flag CY, S, Z flag CY flag 15) In addition which of the following flags are set when the addition of MSBs is more than 10? Auxiliary carry Zero Carry Overflow 4 of 5 Wednesday 16 May :56 PM

5 and Microcontrollers - - Unit 3... Carry Previous Page End 5 of 5 Wednesday 16 May :56 PM

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