Embedded Systems Mock Interview By Qualcomm System Architect | Preplaced
Interviews for Top Jobs at Qualcomm
- Explain the keywords static and volatile in C
- Implement an algorithm that deletes a node from a linked list, given only the head of the LL as input.
- What is the minimum number of lines to write this function?
- Given a 32-bit register, bits 11:8 are PART_NUM and bits 7:0 are PART_REV. Output a 32bit value in the following format: [0000][0000][0000][0000][0000][0000][PART_FAM][PART_NUM]
- Write a function that takes an array of structures, finds the first entry with a matching name field, and returns a duplicate (deep copy) structure.
- Write a function that takes in two arguments (4 bytes each) and swaps the values in bits 31-29 from arg0 with those in bits 15-12 of arg1.
- Design a structure that for a hardware clock that has the following attributes:
- On/Off status
- Frequency Jitter
- Polarity
- Name
- Read the register at address 0x10000 and write the value to 0x20000 (write only). Register at 0x10000 is a FIFO register that will update to the next value after being read. Do this until the value read from 0x10000 is 0x0.
- Given two non-negative integers low and high. Return the count of odd numbers between low and high
- On-site interview questions were about bit manipulation, string reversal and LRU cache. The manager also asked about my work experience and simple OS questions (difficulties with multithreading, deadlock, etc.).
- Describe what a semaphore is in the context of RTOS
Interview questions from similar companies
Embedded Software Engineer Interview Questions
- Basic C Programming questions like swap two elements, palindrome, questions on pointers, difference between structure and unions, dma etc Prepare basic c programming and basic embedded peripherals like ADC, UART, I2C, SPI etc .
- Basic C Programming questions like swap two elements, palindrome, questions on pointers, difference between structure and unions, dma etc Prepare basic c programming and basic embedded peripherals like ADC, UART, I2C, SPI etc
- Coding questions like find pattern in string, find whether its big-endian or small endian, etc
- Here all the questions come from your resume. You should be good enough to explain your project and skills added in your resume.
- Which domain you want to pursue your career.
- Define software for embedded?
- For an embedded device what do you prefer? with OS or without OS?
- Explain 8051 registers assembly
Key Topics for an Embedded Systems Engineer Interview
Key areas you should focus on when preparing for your embedded systems engineer interview are:
- Problem-solving
- Algorithms
- Common data structures for embedded systems
- Writing structured code
- Designing an embedded system keeping the following in mind;
- Keeping h/w, application s/w, and customers in mind
- Modularity and clear interfaces
- Speed
- Concurrency
- Reducing memcpy
- Handling endianness
- Managing memory constraints
- Queuing requests
- Tradeoffs for RPC/IPC calls
- The experience mentioned in the resume
- Topics specific to your role at the company
- Embedded systems
- Design and architecture considerations
- Embedded OS features
- Writing optimized C and assembly language code
- Debugging codeÂ
- Team-work
The key points mentioned below will help you understand the interview process for an embedded systems engineer
Online assignment: The interview process may start with an online assessment or a 30-minute phone interview depending on the company. This online assessment may or may not be optional.
Onsite: Next, there’ll be 4 to 6 largely independent onsite rounds. Almost all of these rounds will be technical, except for those about cultural fit.
- All the onsite rounds together, including lunch break, would roughly take up a working day. You can expect each onsite interview round to take 45 to 60 minutes.
- The number of rounds in some cases might extend to 7 or 8 in some companies like Apple.
- These onsite rounds may occur on the same day as the telephonic interview in some companies like Microsoft.
Coding rounds: You can look at the coding rounds as divided into two categories, where the first category deals with general coding, data structures, and algorithms, and the second category deals with programming in C, C++, and assembly.
You can ask any appropriate questions you might have at the end of the interview.
FAQ
How do I prepare for Qualcomm interview?
Prepare and Succeed: Qualcomm Interview FAQ
- Research successful interviewing techniques and preview common questions. Think through your responses, then practice (yes, out loud) to enhance your communications skills.
- Do your homework. …
- Have a few personal stories in mind that demonstrate your problem-solving skills.
Are Qualcomm interviews tough?
Glassdoor users rated their interview experience at Qualcomm as 72.0% positive with a difficulty rating score of 3.12 out of 5 (where 5 is the highest level of difficulty).
Why do you want to join Qualcomm?
Qualcomm also offers amazing benefits and social opportunities for its employees to connect with one another, develop soft skills, give back to the community, and take care of their families.
How many rounds are there in Qualcomm?
Qualcomm conducts 3 rounds to select freshers as Software Engineer in their organisation.
