This page

page: question
human URL: https://www.mokabla.com/en/c/brightskies/embedded-c-and-peripherals

State

question: object · slug, title, difficulty, tags, is_free, locked, frequency, last_reported_at, url, agent, company, body_md, follow_ups_md
paid: false
access: Question bodies are paid content: a person buys 30 days of access per company (200 EGP or 200 points) in the human app. Agents get titles, tags and difficulty; bodies only for free questions.

{
  "question": {
    "slug": "embedded-c-and-peripherals",
    "title": "Embedded C and Peripherals",
    "difficulty": "medium",
    "tags": [
      "embedded",
      "technical",
      "role-embedded"
    ],
    "is_free": true,
    "locked": false,
    "frequency": 1,
    "last_reported_at": "2026-02-22T15:12:38.218685Z",
    "url": "https://www.mokabla.com/en/c/brightskies/embedded-c-and-peripherals",
    "agent": {
      "page": "https://www.mokabla.com/agent/en/c/brightskies/embedded-c-and-peripherals",
      "question": "https://www.mokabla.com/agent/_call/get_question?company=brightskies&question=embedded-c-and-peripherals"
    },
    "company": {
      "slug": "brightskies",
      "name_en": "Brightskies"
    },
    "body_md": "## What they ask\nThe technical interview for embedded roles runs long, around two hours, and is followed later by a thirty-minute HR call and a thirty-minute chat with the manager. The two hours are split between C, microcontroller peripherals and communication protocols. Questions in this area, for example:\n\n**C.** What does `volatile` mean and where must you use it? Difference between `const char *p`, `char * const p` and `const char * const p`. Write a macro that sets, clears and toggles bit `n` of a register. Where do `static` locals live and when are they initialised? Layout of a struct with mixed field sizes, and what `union` is good for in a driver.\n\n**Peripherals.** How does a timer generate a periodic interrupt and how do you pick prescaler and reload for a 1 ms tick at 16 MHz? What must an ISR avoid doing? ADC resolution and sampling time. GPIO modes (push-pull vs open-drain, pull-ups).\n\n**Protocols.** Compare UART, SPI and I2C: wiring, clocking, speed, addressing, when you would pick each. CAN basics: frame fields, how arbitration works with dominant and recessive bits, why a lower ID wins. Diagnostics on top of CAN come up for the automotive teams.\n\n## What they look for\nPrecise definitions, then reasoning at the register level. They will happily go deeper on any topic you claim on your CV, so keep your CV honest.",
    "follow_ups_md": "- Two tasks share a UART driver. How do you make the driver safe without disabling interrupts for long?\n- A CAN bus shows sporadic error frames. What do you check on the hardware side and on the software side?"
  },
  "paid": false,
  "access": "Question bodies are paid content: a person buys 30 days of access per company (200 EGP or 200 points) in the human app. Agents get titles, tags and difficulty; bodies only for free questions."
}

Actions you may take here

action	input	permission
get_question One question with its body. Bodies are paid content unless the question is free.	company: string, question: string	Allowed	call →
list_questions The questions reported at a company: titles, tags, difficulty, whether each is free or paid.	company: string, page: number?	Allowed	call →
buy_access Buy 30 days of access to a company.	company: string	Refused R1 This action is for people only	people: https://www.mokabla.com/en/pricing
post_comment Comment on a question.	question: string, text: string	Refused R1 This action is for people only	people: https://www.mokabla.com/en/companies

Allowed actions answer in JSON. Add ?format=json or send Accept: application/json to get this whole page as data.

Who you are, as far as this app can tell

This page

State

Actions you may take here

Navigate (pre-filled links you can follow)

Notices