HCLTech Embedded Developer Interview Questions and Answers

Q1. What difference between Microprocessor and Micro controller?
Ans. 
Microprocessor is a standalone CPU while microcontroller has CPU, memory, and peripherals on a single chip.
• Microprocessor is used in applications where processing power is the main requirement, like computers.

• Microcontroller is used in embedded systems where space, power, and cost are constraints, like in IoT devices.

• Microprocessors require external components like memory and peripherals, while microcontrollers have th...read more
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Q2. Talk about communication protocol such as I2C, UART, SPI? Which is faster and how
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Q3. Stack memory in microcontroller
Ans. 
Stack memory in microcontrollers is used for storing local variables, function parameters, return addresses, and other temporary data during program execution.
• Stack memory is a limited resource in microcontrollers and is typically smaller than heap memory.

• Stack memory is managed automatically by the compiler and is organized as a LIFO (Last In, First Out) data structure.

• Accessing stack memory is faster than accessing h...read more
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Q4. What's use the use of Static keywords
Ans. 
Static keyword is used to declare variables and functions that are only accessible within the file they are declared in.
• Static variables retain their value between function calls

• Static functions can only be called within the file they are declared in

• Static variables in functions are initialized only once
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Q5. Bit manipulation programming questions
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Q1. SPI, I2C, etc communication protocol
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C basics , data structure, logical questions.
, pointers

Percentage, speed, series, logical abulity, differnces

Q1. C programs, protocols, Embedded C, pointers
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Q2. Strings swapping nibbles using c
Ans. 
Swapping nibbles of strings in C
• Use bitwise operations to swap the nibbles of each character in the string

• Iterate through each character in the string and swap the nibbles

• Ensure to handle edge cases like strings with odd length or non-hex characters
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Q3. I2c, can, spi, uart
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Q1. Normal hr questions
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Q2. Self, company details
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Online c programming test using online tool

Q1. Manager level round - explain about project and area of difficulty in embedded. Which one we work and fix issue
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Q1. Discuss about offer letter
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Very basic c questions like an array

Q1. Mainly focused on basics of c language Stack program
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Q2. Compilation stages , function
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