Microcontroller Interview Questions and Answers, Microcontroller Interview Questions and Answers Freshers, Microcontroller Interview Questions and Answers, Microcontroller Interview Questions
Before getting on to the Microcontroller interview questions, the student must know that the Microcontroller is a continuously varying field which needs the students as well as professionals to upgrade their skills with the new features and knowledge, to get fit for the jobs associated with Microcontroller. This post related to Microcontroller Interview Questions and Answers, Microcontroller Interview Questions and Answers Freshers, Microcontroller Interview Questions and Answers, Microcontroller Interview Questions will help you let out find all the solutions that are frequently asked in you upcoming Microcontroller interview.
Over thousands of vacancies available for the Microcontroller developers, experts must be acquaintance with all the component of Microcontroller technologies. This is necessary for the students in order to have in-depth knowledge of the subject so that they can have best employment opportunities in the future. Knowing every little detail about Microcontroller is the best approach to solve the problems linked with problem.
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First of all, let us tell you about how the Microcontroller technology is evolving in today’s world and how demanding it is in the upcoming years. In fact, according to one study, most of the companies and businesses have moved to the Microcontroller. Now, you cannot predict how huge the future is going to be for the people experienced in the related technologies.
Hence, if you are looking for boosting up your profile and securing your future, Microcontroller will help you in reaching the zenith of your career. Apart from this, you would also have a lot of opportunities as a fresher.
These questions alone are omnipotent. Read and re-read the questions and their solutions to get accustomed to what you will be asked in the interview. These Microcontroller interview questions and answers will also help you on your way to mastering the skills and will take you to the giant world where worldwide and local businesses, huge or medium, are picking up the best and quality Microcontroller professionals.
This ultimate list of best Microcontroller interview questions will ride you through the quick knowledge of the subject and topics like real time systems, Difference between CISC and RISC processors, Debugging Techniques. This Microcontroller interview questions and answers can be your next gateway to your next job as a Microcontroller expert.
These are very Basic Microcontroller Interview Questions and Answers for freshers and experienced both.
Q1: Introduction Of 8051 Microcontroller Architecture?
A1: In 1981, Intel Corporation introduced an 8-bit microcontroller called the 8051. The 8051 became widely popular after Intel allowed other manufacturers to make and market any flavors of the 8051. They please with the condition that they remain code-compatible with the 8051. This has led to many, versions of the 8051 with different speeds and amounts of on-chip ROM marketed by more than half a dozen manufacturers. It is important to note that although there are different flavors of the 8051 in terms of speed and amount of on-chip ROM, they are all compatible with the original 8051 as far as the instructions are concerned. This means that if you write your program for one, it will run on any of them regardless of the manufacturer.
Q2: Intel 8051 Follows Which Architecture?
A2: Intel 8051 is Harvard Architecture.
Q3: Why 8051 Is Called 8 Bit Microcontroller?
A3: The Intel 8051 is an 8-bit microcontroller which means that most available operations are limited to 8 bits.
Q4: List Out The Features Of 8051 Microcontroller?
A4:
- 40 Pin IC.
- 128 bytes of RAM.
- 4K ROM.
- 2 Timers (Timer 0 and Timer 1).
- 32 Input/ Output pins.
- 1 serial port.
- 6 Interrupts (Including Reset).
Q5: How Much Total External Data Memory That Can Be Interfaced To The 8051?
A5: 64K data memory
Q6: What Are The Types Of Interrupts In 8051?
A6:
- External interrupt 0 (IE0) has highest priority among interrupts.
- Timer interrupt 0 (TF0)
- External interrupt 1 (IE1)
- Timer interrupt 1 (TF1) has lowest priority among other interrupts.
- Serial port Interrupt
- Reset.
Q7: What Is Equ?
A7:
- EQU is the equate assembler directive used to define a constant without occupying a memory location.
- It associates a constant value with data label.
- Whenever the label appears in the program, constant value is substituted for label.
- Advantage: The constant value occurring at various positions in a program can be changed at once using this directive.
- Syntax: label EQU constant value
Q8: Tell The Addresses Which Are Bit Addressable?
A8: The bit addressable memory in 8051 is compose from 210 bits: bit address space: 20H – 2FH bytes RAM = 00H – 7FH bits address, SFR registers.
Q9: What Is Lst File?
A9:
- This file is also called as list file.
- It lists the opcodes, addresses and errors detected by the assembler.
- List file is produced only when indicated by the user.
- It can be accessed by an editor and displayed on monitor screen or printed.
Programmer uses this file to find the syntax errors and later fix them.
Q10: What are the various criteria to choose the microcontroller?
A10: The important criteria to be considered in choosing micro controllers are:
(1) Availability of software development tools like compilers, debuggers, assemblers
(2) Meeting the computing needs of the task at hand efficiently at low-cost.
(3) Wide availability
(4) Reliable sources/manufacturers
(5) The amount of RAM and ROM on chip
(6) The number of I/O pins and the timer on the chip
(7) Power consumption
(8) Speed of the device
(9) Packaging
(10) Cost per unit.
Q11: What is difference between microprocessor and microcontroller?
A11: The microprocessor has no ROM, RAM and no I/O ports on the chip itself.
Whereas the microcontroller has a CPU in addition to a fixed amount of RAM,ROM, I/O ports and a timer all on a single chip.
Q12: What is meant by Flipflop?
A12: A Flip-flop is a basic electronic circuit used for storing information in a digital machine.
It is a bistable device. It means it has two stable states.
It has one or more inputs and two complement outputs.
Q13: What location code memory space and data memory space begins?
A13: At location 0x00 for internal or external memory
Q14: How Much on chip RAM is available?
A14: 128 bytes of RAM (from 0x00 to 0x7F) and can be used to store data.
Q15: With 12 MHz clock frequency how many instructions (of 1 machine cycle and 2 machine cycle) it can execute per second?
A15: A cycle is, in reality, 12 pulses of the crystal. That is to say, if an instruction takes one machine cycle to execute, it will take 12 pulses of the crystal to execute. Since we know the crystal is pulsing 11,059,000 times per second and that one machine cycle is 12 pulses, we can calculate how many instruction cycles the 8051 can execute per second:
Q16: Mention any one 32 bit microcontroller and explain the same.
A16: There are various microcontrollers which supports 32 bit architecture. One such microcontroller is from freescale.
Q17: Explain data types used in microcontroller programming,
A17: One need to explain data types with their size of storage and range of values if asked specifically. Typical data types are bit, sbit, sfr, float, signed char,unsigned char, enum, signed int etc.
Q18: What is the difference between timer and counter of microcontroller?
A18: Timer counts internal clock cycles while counter counts external events.
Q19: What Is The Difference Between Harvard Architecture And Von Neumann Architecture?
A19: The name Harvard Architecture comes from the Harvard Mark. The most obvious characteristic of the Harvard Architecture is that it has physically separate signals and storage for code and data memory. It is possible to access program memory and data memory simultaneously. Typically, code (or program) memory is read-only and data memory is read-write. Therefore, it is impossible for program contents to be modified by the program itself.
The von Neumann Architecture is named after the mathematician and early computer scientist John von Neumann. Von Neumann machines have shared signals and memory for code and data. Thus, the program can be easily modified by itself since it is stored in read-write memory.
Q20: What Is The Width Of Data Bus?
A20: 8-bit data bus
Microcontroller Conclusion Interview FAQs
We know the list of Microcontroller Interview Questions and Answers, Microcontroller Interview Questions and Answers Freshers, Microcontroller Interview Questions and Answers, Microcontroller Interview Questions is overwhelming but the advantages of reading all the questions will maximize your potential and help you crack the interview. The surprising fact is that this Microcontroller interview questions and answers post covers all the basic of the Microcontroller technology and you have to check out the FAQs of different components of Microcontroller too.
However, you will be asked with the questions in the interview related to the above mentioned questions. Preparing and understanding all the concept of Microcontroller technology will help you strengthen the other little information around the topic.
After preparing these interview questions, we recommend you to go for a mock interview before facing the real one. You can take the help of your friend or a Microcontroller expert to find the loop holes in your skills and knowledge. Moreover, this will also allow you in practicing and improving the communication skill which plays a vital role in getting placed and grabbing high salaries.
Remember, in the interview, the company or the business or you can say the examiner often checks your basic knowledge of the subject. If your basics is covered and strengthened, you can have the job of your dream. The industry experts understand that if the foundation of the student is already made up, it is easy for the company to educate the employ towards advance skills. If there are no basics, there is no meaning of having learnt the subject.
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We hope that you enjoyed reading Microcontroller Interview Questions and Answers, Microcontroller Interview Questions and Answers Freshers, Microcontroller Interview Questions and Answers, Microcontroller Interview Questions and all the FAQs associated with the interview. Do not forget to revise all the Microcontroller interview questions and answers before going for the Microcontroller interview. In addition to this, if you’ve any doubt or query associated with Microcontroller, you can contact us anytime. We will be happy to help you out at our earliest convenience. At last, we wish you all the best for your upcoming interview on Microcontroller Technology.
