This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Keyboard interfacing”. 1. Which of the following steps detects the key in a 4*4 keyboard matrix about the key that is being pressed? a) masking of bits b) ensuring that initially, all keys are open c) checking that whether the key is … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “LCD Interfacing”. 1. How many rows and columns are present in a 16*2 alphanumeric LCD? a) rows=2, columns=32 b) rows=16, columns=2 c) rows=16, columns=16 d) rows=2, columns=16 2. How many data lines are there in a 16*2 alphanumeric LCD? a) 16 b) … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Interrupt Programming”. 1. When an interrupt is enabled, then where does the pointer moves immediately after this interrupt has occurred? a) to the next instruction which is to be executed b) to the first instruction of ISR c) to a fixed location … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on ” Serial Port Communication”. 1. Which devices are specifically being used for converting serial to parallel and from parallel to serial respectively? a) timers b) counters c) registers d) serial communication 2. What is the difference between UART and USART communication? a) … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “I/O Port Programming and Addressing Modes”. 1. What is the clock source for the timers? a) some external crystal applied to the micro-controller for executing the timer b) from the crystal applied to the micro-controller c) through the software d) through programming … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Arithmetic and Logic Instructions”. 1. When we add two numbers the destination address must always be. a) some immediate data b) any register c) accumulator d) memory 2. DAA command adds 6 to the nibble if: a) CY and AC are necessarily … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “I/O Port Programming and Addressing Modes”. 1. To initialize any port as an output port what value is to be given to it? a) 0xFF b) 0x00 c) 0x01 d) A port is by default an output port 2. Which out of … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Jump, Loop and Call Instructions”. 1. “DJNZ R0, label” is ________ byte instruction. a) 2 b) 3 c) 1 d) Can’t be determined 2. JZ, JNZ, instructions checked content of _______ register. a) DPTR b) B c) A d) PSW 3. Calculate … Read more
This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Architecture”. 1. 8051 microcontrollers are manufactured by which of the following companies? a) Atmel b) Philips c) Intel d) All of the mentioned 2. AT89C2051 has RAM of: a) 128 bytes b) 256 bytes c) 64 bytes d) 512 bytes 3. 8051 … Read more
This set of Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Von Neumann and Harward Architectures”. 1. How many types of architectures are available, for designing a device that is able to work on its own? a) 3 b) 2 c) 1 d) 4 2. Which architecture is followed by general purpose microprocessors? a) … Read more
