JiaYu said: How to do a good job in IT technical interviews?

JiaYu belongs to the embedded industry, so here is just an analysis of technical interview skills from the perspective of ordinary programmers.
Of course, a small summary of embedded technical interviews is also made. Friends can click on the directory to jump directly

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Tips for interviewing IT companies

1. Prepare for common interview questions : review common interview questions, including introduction about yourself, professional experience, technical skills, problem-solving methods, etc. Also prepare some technical depth questions, because technical job interviews usually test your professional knowledge.

2. Demonstrate your own projects : During the interview, highlight your contributions and technical prowess in the projects by showing the projects you have participated in in the past. If possible, provide an online demo or code sample of the project.

3. Practice Programming and Algorithm Questions : Practice programming and arithmetic questions will help improve your problem-solving skills. Mastering common data structures and algorithms, and learning to optimize code can be of great benefit in interviews.

4. Understand the company culture and values : Research the culture and values ​​of the target company, and try to show that you fit the company culture in the interview. This helps the interviewer feel that you are a good fit for the company team.

5. Demonstrate problem-solving ideas : During an interview, don't be afraid to answer "don't know" if you're asked a tricky question. It can show your problem-solving ideas and let the interviewer understand your analytical ability.

6. Prepare questions and answers : Prepare some answers in advance, especially questions about past work experience, career plans, etc. At the same time, prepare some questions that the interviewer may ask you to show that you care about the company and the position.

7. Listen carefully : When interviewing, listen carefully to the interviewer's questions and make sure you understand the core of the question. Ask the interviewer for clarification if something is unclear.

8. Demonstrate teamwork skills : When answering the questions, emphasize how you have worked with teams, resolved conflicts, and contributed to project success in your past jobs.

9. Demonstrate a continuous learning attitude : The IT industry is changing rapidly, demonstrate your willingness to continuously learn new technologies and knowledge to adapt to industry developments.

10. Be Confident and Courteous : Be confident, project a positive attitude, and be courteous and respectful to each interviewer.

Remember, an interview is a process of getting to know each other. Not only is the interviewer getting to know you, but you should also ask questions to understand whether the company and position are a good fit for your expectations. I wish you success in your interview!

Frequently Asked Questions in IT Technical Interviews

The following are some common questions in IT technical interviews, covering different aspects of technical knowledge and personal qualities:

1. Self-introduction : Please briefly introduce yourself, including educational background, work experience and professional skills.

2. Project experience : Talk about the projects you worked on, your role in them, the challenges you encountered and how you solved them.

3. Programming language and technology stack : What programming language and technology stack are you most familiar with? What practical application experience do you have?

4. Data Structures and Algorithms : Explains common data structures and algorithms, and may allow you to solve some programming problems or optimize existing algorithms.

5. Database : Questions about databases, such as SQL queries, the role and optimization of indexes, transactions, etc.

6. Systems Design : If applying for a senior position, you may be asked about system design, such as designing an online store or social platform.

7. Front-end related : If it is a front-end development position, you may ask about HTML, CSS, JavaScript-related knowledge, as well as front-end frameworks and tools.

8. Back-end related : If it is a back-end development position, you may ask about server-side programming, RESTful API, microservices, etc.

9. Network and Security : Security-related issues such as network communication, HTTP, HTTPS, cross-site scripting (XSS), SQL injection, etc.

10. Operating Systems and Servers : Commands and server configurations for common operating systems (eg, Linux, Windows).

11. Version Control : About Git usage and workflow.

12. Continuous integration and continuous deployment : knowledge about CI/CD.

13. Problem-solving ideas : The interviewer may give you a practical problem and ask you how to solve it, which tests your thinking and analysis skills.

14. Teamwork and Communication Skills : You will be asked how you have worked with teams, resolved conflicts, and communicated with colleagues in the past.

15. Career Planning : What are your career goals? What is the plan for the next few years?

These questions may only be part of the interview, and the interviewer may explore relevant technologies and knowledge in depth based on your answers. When preparing for an interview, understand these common questions, and review and improve your skills in a targeted manner based on the position and company you are applying for. At the same time, maintain a confident and positive attitude, showing your ability to adapt to the team and solve problems.

Embedded technology interview

Embedded technology interview frequently asked questions

In an embedded technology interview, the interviewer asks a series of questions about the candidate's knowledge and experience in embedded systems development. Here are some common embedded technology interview questions (lower level):

1. What is an embedded system? : Explain the definition, characteristics and application scenarios of embedded systems.

2. Embedded system development process : Describe the general process of embedded system development, including requirements analysis, design, implementation, testing and deployment.

3. Differences Between Microcontrollers and Microprocessors : Compare the similarities and differences between microcontrollers and microprocessors, and their applications in embedded systems.

4. C/C++ Programming : Explain why the C/C++ programming language is often used in embedded system development.

5. Bare Metal Programming and RTOS : Explains the concepts of bare metal programming and real-time operating systems (RTOSs), and discusses their pros and cons.

6. Peripheral interfaces : introduce common peripheral interfaces in embedded systems, such as UART, SPI, I2C, GPIO, etc., and explain their uses.

7. Interrupts and Timers : Explains the role of interrupts and timers in embedded systems, and how to write interrupt service functions.

8. Embedded System Debugging : Tell us about your experience in debugging embedded systems and the debugging tools you use.

9. Embedded operating system : Find out if you are familiar with common embedded operating systems, such as FreeRTOS, RTOS, uC/OS, etc., and compare their features.

10. Power Optimization : Discusses how to optimize power consumption in embedded systems to extend battery life.

11. Embedded Hardware Design : Learn what you know about embedded hardware design, including circuit diagram design, PCB layout, and hardware debugging, etc.

12. Communication Protocol : Introduces common communication protocols in embedded systems, such as UART, SPI, I2C, CAN, Ethernet, etc.

13. Memory Management : Explain how to manage memory in embedded systems, including the use of RAM and Flash.

14. Real-time and concurrency : Talk about how to deal with real-time and concurrency issues in embedded systems.

15. Security : Discusses how to consider and improve security in embedded systems to prevent potential attacks and vulnerabilities.

16. Bootloader : Explains what and how a bootloader does and works, and talks about whether you've ever developed a custom bootloader.

17. Firmware Upgrade : Discusses the firmware upgrade process in embedded systems, how to ensure safe and reliable firmware updates.

18. Power management : details how power management is done in embedded systems, such as the use of sleep modes and low-power modes.

19. RTOS Scheduler : Explains how a real-time operating system (RTOS) scheduler works, and talks about whether you have ever dealt with real-time task scheduling.

20. Hardware Interface Programming : Discusses how to programmatically interact with peripherals and sensors such as ADC (Analog to Digital Converter), PWM (Pulse Width Modulation), etc.

21. Signal Processing : Discusses how signal processing algorithms, such as filters and digital signal processing, are handled and optimized in embedded systems.

22. Troubleshooting : Talk about how you locate and solve faults in embedded system development, such as hardware failures, software errors, etc.

23. Multi-threaded programming : Discusses how to do multi-threaded programming and deal with thread synchronization issues in embedded systems.

24. Real-time communication : Explain how to carry out real-time communication and data synchronization in embedded systems with high real-time requirements.

25. Coding standards and conventions : Talk about whether you follow specific coding standards and conventions, such as MISRA C, etc.

26. RTOS Memory Management : Explains how memory management and stack management are done when using a real-time operating system.

27. Embedded Linux : Discuss whether you have experience using the Linux operating system in embedded systems and talk about your experience.

28. Board Support Package (BSP) : Discuss whether you have experience developing and customizing a Board Support Package for a specific hardware platform.

29. Debugging tools : Talk about the debugging tools you use in embedded system development, such as JTAG debugger, logic analyzer, etc.

30. Software Optimization : Explain your experience with software optimization in embedded systems to improve performance and reduce resource footprint.

31. Firmware debugging : Describe your methods and tools for firmware debugging in embedded systems, such as printf, debugger, logic analyzer, etc.

32. Embedded real-time operating system selection : Discuss how to choose a suitable real-time operating system when developing an embedded system, and explain the reasons for the choice.

33. Interrupts and multi-threaded concurrency control : Explain how to handle interrupts and multi-threaded concurrency control in embedded systems to avoid race conditions.

34. RTOS task communication : discusses how to communicate and synchronize between tasks in a real-time operating system.

35. Performance Optimization for Embedded Systems : Describes how you can optimize performance in embedded systems to reduce response time and power consumption.

36. Real-time and Response Time Guarantees : Discusses how to guarantee the real-time and response time of tasks in real-time systems.

37. Firmware Version Control : Explain how you can implement version control in firmware development to ensure reliable code management.

38. Embedded System Security : Talks about how to consider security and guard against potential attacks in embedded systems.

39. Embedded System Testing : Describe how you test embedded systems, including unit testing, integration testing, and system testing.

40. Real-Time Clocks and Timers : Explains how to use real-time clocks and timers for task scheduling and event triggering in real-time applications.

41. Hard vs. Soft Real-Time for Embedded Systems : Explain the difference between hard and soft real-time systems, and talk about hard-real-time systems you've developed.

42. Processor Architectures : Discuss processor architectures and architectures with which you are familiar, such as ARM, MIPS, x86, etc.

43. Power Management : Talk about how to manage power in embedded systems to extend battery life and save energy.

44. Drivers for External Devices : Explains how you can write drivers for external devices in embedded systems.

45. Real-time task priority : Discusses how to set the priority of tasks in a real-time operating system to meet the real-time requirements of the system.

46. Firmware burning and updating : Describe how you can burn and update firmware, and how to ensure the reliability of burning.

47. Secure Boot and Encryption in Embedded Systems : Discusses how to implement secure boot and encrypted communications for embedded systems.

48. RTOS kernel scheduling algorithm : explain common RTOS kernel scheduling algorithms, such as preemptive scheduling, time slice round-robin scheduling, etc.

49. Hardware Fault Handling : Talks about how to handle hardware faults in embedded systems, such as aborts and error handling.

50. Embedded system development tools : introduce your commonly used embedded system development tools, such as compilers, debuggers, emulators, etc.

When interviewing, demonstrate a deep understanding of embedded systems development based on your experience and skills. According to the job requirements, prepare a detailed description of relevant technical knowledge and project experience, and demonstrate your practical application ability and problem-solving ability. At the same time, maintain a positive learning attitude and show your willingness to adapt to new technologies and challenges.

Embedded Software/Hardware Interview Questions

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