Interview Questions.

Question 1. What Is Microprocessor?

Answer :

Microprocessor is a CPU fabricated on a single chip software controlled tool, which fetched the instructions from reminiscence, decodes and execute the instructions. Three primary characteristic differentiate microprocessor.

Instruction Set: The set of instruction microprocessor can execute.
Bandwidth: The variety of bit’s processed in a unmarried instruction
Clock Speed: Given in MHz Megahertz, the clock speed determines how many instructions in line with 2d the processor can execute.
In addition to this, microprocessors are labeled as being RISC (Reduced Instruction Set Computer) or CISC (Complex Instruction Set Computer).

Question 2. What Are The Basic Units Of Microprocessor?

Answer :

The primary units or block of microprocessor are ALU, an Array of Registers and manipulate unit.

Embedded Systems Interview Questions
Question 3. Give Examples For8/16/32-bit Microprocessor?

Answer :

eight-bit Processors- 8085, Z80, 6800
16-bit Processors- 8086, 68000, Z8000
32-bit Processors- 80386, 80486
sixty four-bit Processors- Intel sixty four(x64), AMD64, IBM (Power PC), SUN (SPARC).
Question 4. What Are 1st/ second/3rd/4th Generation Processors?

Answer :

The processors manufactured from PMOS, NMOS, HMOS, HCMOS technology are called 1st/ 2d/third/4th era processor’s and are made up of four, eight, sixteen, 32-bits.

Question 5. What Does Microprocessor Speed Depends On?

Answer :

The pace of microprocessor depends on various factors inclusive of Data Bus Width (Number of coaching it tactics) and clock pace.

Embedded C Interview Questions
Question 6. What Is Software And Hardware?

Answer :

The software program is about of guidance or commands wished for acting a selected mission through programmable device or a computing machine. The hardware refers to the thing or tool used to shape computing device wherein software may be run and examined. Without software hardware is idle device.

Question 7. Distinguish Between Microprocessor And Microcontroller?

Answer :

The microprocessor is a digital integrated circuit that may be programmed with a sequence of instructions to perform a certain feature on information. The microcontroller is tiny little laptop on single included circuit, which has memory, enter-output on chip itself. So we can say microprocessor can carry out few features however microcontroller can perform many features.

Embedded Testing Interview Questions
Question 8. What Are Disadvantages Of Microprocessor?

Answer :

Microprocessor has dilemma on length of statistics. Most microprocessor does not assist floating factor operation.

Question nine. What Is The Difference Between Microprocessor And Microcontroller?

Answer :

In microprocessor extra op-codes, few bit managing instructions but in microcontroller: fewer op-codes and extra bit managing commands additionally microcontroller defined as a device that includes microprocessor, memory and input-output signal traces in a unmarried chip.

Question 10. What Is An Instruction?

Answer :

An coaching is an order given to a laptop processor by a pc software. At the bottom stage every practise set is a series of 0s and 1s that describes a physical operation that laptop is to perform (consisting of “Add”) and relying on the specific practise type, the specification of unique storage regions known as registers that can incorporate facts be used in wearing out the training or the area in pc reminiscence of facts.

Question eleven. What Is Clock Cycle?

Answer :

The speed of pc processor is determined with the aid of clock cycle, that is quantity of time between  pulses of an oscillator. In wellknown, the better number of pulses in keeping with 2nd the faster the pc processor will be capable of system statistics.

Question 12. What Is Instruction Cycle?

Answer :

The collection of operation that the processor has to carry out whilst executing a education is referred to as education cycle. Each practise cycle of processor include a number of gadget cycles. The collection of ranges is:

Read an coaching.
Decode the education.
Find the address of operand.
Retrieve an operand.
Perform desired operation.
Find the deal with of destination.
Store the result into vacation spot.
Embedded Systems Interview Questions
Question 13. What Is Machine Cycle?

Answer :

The steps done by way of computer processor for every gadget language guidance acquired. The gadget cycle is 4 technique cycle.

Fetch: Retrieve an guidance from reminiscence
Decode: Translate the retrieved preparation into collection of pc instructions.
Execute: Execute the computer command.
Store: Send and write the result back into reminiscence.
Question 14. Explain The Function Of Cpu In Microprocessor?

Answer :

A Microprocessor controls all of the capabilities of CPU Central Processing Unit of a laptop or digital tool. The microprocessor is programmed to give and obtain instructions from different additives of the tool. The system can manage everything from small devices including calculators and cell telephones to massive automobile.

Question 15. What Is Register?

Answer :

In computer architecture, a processor sign up (or standard purpose check in) is a small amount of garage available at the CPU whose contents may be accessed more quick than storage to be had somewhere else. Typically, this specialized storage isn't always considered a part of normal memory variety for the system. Processor registers are at the top of the reminiscence hierarchy, and offer the quickest way for a CPU to get admission to records.

Question 16. What Is Called Scratch Pad Of Computer?

Answer :

Cache memory is scratch pad of laptop.

Question 17. Why Does Microprocessor Contain Rom Chip?

Answer :

Microprocessor include ROM chip as it comprise guidance to execute records.

Question 18. Why Status Signal Is Provided In Microprocessor?

Answer :

The status signal can be used by the gadget dressmaker to tune the internal operation of the processor. Also it could be used for memory enlargement (via presenting separate memory bank for application, records and selecting the financial institution the usage of repute alerts.

Embedded C Interview Questions
Question 19. What Is Programmable Peripheral Device?

Answer :

If the feature executed with the aid of a peripheral tool may be altered or modified through a application guidance then the peripheral device is referred to as programmable tool. Usually the programmable devices can have control registers. The tool may be programmed by way of sending control phrase within the prescribed format to the manipulate register.

Question 20. Explain The Working Of A Handshake Output Port?

Answer :

In handshake output operation the processor will load a records to port. When the port receives the information, it'll inform the output tool to acquire the statistics. Once the output device accepts the statistics, the port will inform the processor that it's far empty. Now the processor can load any other data to port and above procedure is repeated.

Question 21. What Is Cache Memory?

Answer :

Cache memory is small high pace reminiscence. It is used for transient garage of information & data between primary reminiscence and CPU (significant processing unit).

Question 22. Define Hcmos?

Answer :

High density n-kind Complementary Metal Oxide silicon discipline effect Transistor.

Question 23. What Is Flag?

Answer :

Flag is flip-flop used to shop the data approximately the status of a processor and standing of practise completed maximum lately.

Question 24. What Is Nv-ram?

Answer :

Non Volatile Read Write memory, also referred to as flash memory. It is also called shadow RAM.

Embedded Testing Interview Questions
Question 25. What Is Direction Flag?

Answer :

This is utilized by string manipulation commands. If this flag bit is ‘zero’, the string is processed starting from the lowest to maximum deal with i.E. Auto increment mode. Otherwise string is processed from the very best in the direction of the lowest deal with i.E. Auto decrementing mode.

Question 26. What Is Instruction Set?

Answer :

The set of commands that the microprocessor can execute.

Question 27. Why Address Bus Is Unidirectional?

Answer :

The deal with is identification quantity utilized by the microprocessor to pick out or get right of entry to a memory region or IO tool. It is an output signal from the processor. Hence the address bus is unidirectional.

Here is the cease of this post. Probably in the subsequent submit will see more hard interview questions on embedded processors. I hope you’ll find this put up instructional.