Top 30 Microprocessors Interview Questions and Answers

The microprocessor is the central processing unit (CPU) of a computer system, responsible for executing instructions.

• Microprocessor is an integrated circuit that contains the arithmetic logic unit (ALU), control unit, and registers.

• It fetches instructions from memory, decodes them, and executes them.

• Example: To add two numbers, the microprocessor fetches the instruction, loads the numbers from memory, performs the addition in the ALU, and stores the result in memory.

• The micro...read more

A microprocessor is a single chip CPU while a microcontroller is a CPU with integrated peripherals.

• Microprocessor is used in computers while microcontroller is used in embedded systems.

• Microprocessor requires external memory and peripherals while microcontroller has them integrated.

• Microprocessor is more powerful and expensive than microcontroller.

• Examples of microprocessors are Intel Pentium, AMD Ryzen while examples of microcontrollers are Arduino, Raspberry Pi.

The 8085 is a microprocessor introduced by Intel in 1976.

• It is an 8-bit microprocessor.

• It has a 16-bit address bus and can address up to 64 KB of memory.

• It operates at a clock speed of 3 MHz.

• It has a total of 74 instructions.

• It is widely used in embedded systems and educational purposes.

The number of cycles a microprocessor runs in MOV A,B depends on the specific microprocessor architecture.

• The number of cycles can vary depending on the microprocessor architecture and its implementation.

• In general, MOV A,B is a simple instruction that moves the value in register B to register A.

• The number of cycles required for this instruction can range from 1 to multiple cycles.

• Factors such as the microprocessor's pipeline, cache, and instruction set architecture can affec...read more

Microcontroller is a self-contained system with memory, input/output peripherals and a processor. Microprocessor only has a processor.

• Microcontroller has on-chip memory and peripherals while microprocessor requires external memory and peripherals

• Microcontroller is used in embedded systems while microprocessor is used in personal computers

• Microcontroller is cheaper and consumes less power than microprocessor

• Examples of microcontrollers are Arduino, PIC, and AVR while examples ...read more

To add two numbers using a microprocessor, perform arithmetic operations using the microprocessor's instruction set.

• Load the two numbers into registers

• Use the microprocessor's addition instruction to add the numbers

• Store the result in a register or memory location

Microcontroller is a single chip computer with on-chip memory and peripherals, while microprocessor is a CPU only.

• Microcontroller has on-chip memory and peripherals, while microprocessor requires external memory and peripherals.

• Microcontroller is used in embedded systems, while microprocessor is used in general-purpose computing.

• Examples of microcontrollers include Arduino, PIC, and AVR, while examples of microprocessors include Intel Pentium, AMD Ryzen, and ARM Cortex.

• Microc...read more

8051 is an 8-bit microcontroller while ARM is a 32-bit microprocessor with higher performance and more advanced features.

• 8051 is an 8-bit microcontroller, while ARM is a 32-bit microprocessor.

• ARM processors generally have higher performance and more advanced features compared to 8051.

• ARM processors are commonly used in mobile devices, embedded systems, and IoT applications, while 8051 is more commonly used in simple embedded systems.

• ARM processors support multiple instruction...read more

There are 5 flags in 8085 microprocessor - Carry, Auxiliary Carry, Sign, Zero, and Parity.

• 8085 microprocessor has 5 flags

• Carry flag is set when there is a carry out of the MSB in an arithmetic operation

• Auxiliary Carry flag is set when there is a carry out of bit 3 in an arithmetic operation

• Sign flag is set when the result of an operation is negative

• Zero flag is set when the result of an operation is zero

• Parity flag is set when the result of an operation has even number of 1s ...read more

The microprocessor saves the current state, jumps to the interrupt service routine, and executes it.

• The microprocessor saves the current state of the program being executed

• It jumps to the interrupt service routine (ISR) specified by the interrupt vector table

• The ISR executes and handles the interrupt

• After the ISR is complete, the microprocessor returns to the saved state and continues executing the program

• Examples of interrupts include timer interrupts, keyboard interrupts, a...read more

The pin diagram of a microprocessor shows the arrangement and functions of each pin on the chip.

• The pin diagram typically includes information about power supply pins, clock pins, address and data bus pins, control pins, and input/output pins.

• Each pin has a specific function, such as providing power, receiving or transmitting data, or controlling the operation of the microprocessor.

• For example, the Intel 8085 microprocessor has 40 pins, with pins like Vcc for power supply, A0...read more

8085MP is a microprocessor developed by Intel in the 1970s.

• 8085MP is an 8-bit microprocessor.

• It has a 16-bit address bus and an 8-bit data bus.

• 8085MP operates at a clock speed of 3 MHz.

• It has 74 instructions and 246 opcodes.

• Example: Intel 8085MP microprocessor.

Microprocessors are essential components in electronic devices, serving as the brain of the system.

• Microprocessors control the operations of electronic devices by executing instructions and processing data.

• They enable devices to perform complex tasks quickly and efficiently.

• Examples of devices with microprocessors include smartphones, laptops, and smart home appliances.

• Microprocessors play a crucial role in enhancing the functionality and performance of electronic devices.

Microcontrollers are integrated circuits that contain a processor core, memory, and programmable input/output peripherals, while microprocessors are just the processor core.

• Microcontrollers are used in embedded systems and have all components on a single chip.

• Microprocessors require external components like memory and peripherals to function.

• Examples of microcontrollers include Arduino, PIC, and Raspberry Pi.

• Examples of microprocessors include Intel Core i7, AMD Ryzen, and AR...read more

Microprocessors and microcontrollers are both types of integrated circuits used in embedded systems.

• Microprocessors are general-purpose processors that can execute a wide range of tasks.

• Microcontrollers are specialized processors designed for specific tasks in embedded systems.

• Microprocessors typically have more processing power and memory compared to microcontrollers.

• Microcontrollers often have built-in peripherals like timers, ADCs, and communication interfaces.

• Microprocess...read more

The stack pointer in 8085 microprocessor consists of 16 bits.

• Stack pointer is a register that stores the address of the last program request in the stack.

• 8085 microprocessor is an 8-bit microprocessor.

• The stack pointer is a 16-bit register in 8085 microprocessor.

Address lines are used to specify a memory location, while data lines are used to transfer data to and from that location in a microprocessor.

• Address lines are used to select a specific memory location in RAM or ROM.

• Data lines are used to transfer data between the microprocessor and memory or I/O devices.

• For example, in an 8-bit microprocessor, there may be 16 address lines and 8 data lines.

• The number of address and data lines determines the maximum amount of memory that can ...read more

Interfacing microprocessor kit with I/O devices involves selecting appropriate communication protocol and configuring the microprocessor pins.

• Select appropriate communication protocol (e.g. SPI, I2C, UART)

• Configure microprocessor pins for communication

• Write code to communicate with I/O devices

• Test and debug the interface

A microprocessor responds to instructions by executing them and producing the desired output.

• A microprocessor executes instructions stored in its memory.

• It fetches the instruction from memory, decodes it, and executes it.

• The response can be in the form of performing arithmetic or logical operations, accessing memory or I/O devices, etc.

• Examples of microprocessors include Intel's x86 processors, ARM processors, etc.

Microprocessor is a standalone CPU while microcontroller has CPU, memory, and peripherals on a single chip.

• Microprocessor is used in applications where processing power is the main requirement, like computers.

• Microcontroller is used in embedded systems where space, power, and cost are constraints, like in IoT devices.

• Microprocessors require external components like memory and peripherals, while microcontrollers have them integrated.

• Examples of microprocessors include Intel Co...read more

The 8085 microprocessor has 40 pins.

• The 8085 microprocessor has 40 pins in total.

• These pins are used for various functions such as data transfer, address bus, control signals, power supply, and clock signals.

• Some of the important pins include the ALE (Address Latch Enable), RD (Read), WR (Write), and RESET pins.

• The pin configuration of the 8085 microprocessor is shown in its datasheet.

• Understanding the pin configuration is important for troubleshooting and designing circuits ...read more

A microprocessor is a small computer chip that performs arithmetic and logic operations.

• Microprocessors are the heart of modern computers and electronic devices.

• They are made up of millions of transistors that switch on and off to perform calculations.

• Microprocessors fetch instructions from memory, decode them, and execute them.

• Examples of microprocessors include Intel's Pentium and AMD's Ryzen processors.

• Microprocessors are used in a wide range of applications, from smartpho...read more

Microprocessors and microcontrollers differ in their functionality and applications.

• Microprocessors are general-purpose processors used in computers and electronic devices.

• Microcontrollers are specialized processors designed for specific tasks and embedded systems.

• Microprocessors require external components for memory, input/output, and other functions.

• Microcontrollers have built-in memory, input/output ports, timers, and other peripherals.

• Microprocessors are commonly used in...read more

The 8085 is a microprocessor that was widely used in the 1980s for various applications.

• The 8085 is an 8-bit microprocessor introduced by Intel in 1977.

• It has a 16-bit address bus and can address up to 64 KB of memory.

• The 8085 operates at a clock speed of 3 MHz.

• It has 74 instructions and uses a single +5V power supply.

• Example: The 8085 was commonly used in early personal computers and embedded systems.

A microprocessor is an integrated circuit that contains the functions of a central processing unit of a computer.

• Microprocessor is the brain of a computer system.

• It contains an arithmetic logic unit (ALU), control unit (CU), and registers.

• Examples of microprocessors include Intel's Pentium, AMD's Ryzen, and ARM's Cortex.

• Microprocessors are used in various devices such as smartphones, cars, and home appliances.

Microprocessors are general-purpose CPUs while microcontrollers are specialized chips with integrated memory and peripherals.

• Microprocessors are used in devices like computers and smartphones, while microcontrollers are used in embedded systems like microwaves and washing machines.

• Microprocessors require external components like memory and peripherals, while microcontrollers have these components integrated on the chip.

• Microprocessors are more powerful and versatile, while mi...read more

The microprocessor 8085 has a total of 40 output pins.

• The microprocessor 8085 is an 8-bit microprocessor.

• It has a total of 40 pins, which are used for various purposes.

• These pins include address bus pins, data bus pins, control pins, and power supply pins.

• Some of the output pins are used for sending signals to external devices or peripherals.

• Examples of output pins in the microprocessor 8085 include the RD (Read) pin and the WR (Write) pin.

A microprocessor is a small electronic device that functions as the central processing unit of a computer.

• Microprocessors execute instructions and perform calculations for various tasks.

• They consist of an arithmetic logic unit, control unit, registers, and cache memory.

• Examples of microprocessors include Intel Core i7, AMD Ryzen, and ARM Cortex.

• Microprocessors use binary code to process data and communicate with other components in a computer system.

Microprocessors and microcontrollers are both integrated circuits used in electronic devices, but they have key differences.

• Microprocessors are general-purpose chips designed to execute a wide range of tasks, while microcontrollers are specialized chips designed for specific applications.

• Microprocessors typically require external components like memory and peripherals to function, while microcontrollers have built-in memory, I/O ports, and other peripherals.

• Microprocessors ar...read more

FLAGS of 8085 are status indicators that show the result of arithmetic and logical operations.

• FLAGS include Carry Flag, Auxiliary Carry Flag, Sign Flag, Zero Flag, and Parity Flag.

• Carry Flag indicates if there was a carry out of the most significant bit during an addition operation.

• Auxiliary Carry Flag indicates if there was a carry out of bit 3 during an addition operation.

• Sign Flag indicates if the result of an operation is negative.

• Zero Flag indicates if the result of an o...read more

Microprocessors are integrated circuits that serve as the central processing unit (CPU) of a computer.

• Microprocessors are responsible for executing instructions and performing calculations.

• They are used in a wide range of devices, from computers and smartphones to cars and home appliances.

• Some popular microprocessors include Intel's Pentium and Core processors, and AMD's Ryzen processors.

• Microprocessors are designed with a specific architecture, such as x86 or ARM, which dete...read more