HCL Group Senior Embedded Engineer Interview Questions and Answers

Q1. Bare metal code for blinking an LED,
Ans. 
Blinking an LED using bare metal code involves directly manipulating hardware registers without an operating system.
• Access the GPIO register for the specific pin connected to the LED

• Set the pin as an output

• Toggle the pin state at regular intervals to create the blinking effect
Answered by AI
Add your answer
Q2. Different types of pointers, volatile variable, storage classes, Static and extern keywords, ISR,
Ans. 
Different types of pointers, volatile variable, storage classes, Static and extern keywords, ISR
• Pointers: Null pointer, void pointer, function pointer

• Volatile variable: Used to indicate that a variable may be changed by external factors

• Storage classes: auto, register, static, extern

• Static keyword: Used to declare variables that are only accessible within the same file

• Extern keyword: Used to declare variables that are d...read more
Answered by AI
Add your answer

Q1. Find nth largest number in a jumbled array
Ans. 
Use sorting to find the nth largest number in a jumbled array.
• Sort the array in descending order.

• Access the nth element in the sorted array to find the nth largest number.
Answered by AI
Add your answer
Q2. Deeper questions on static, compilation
Add your answer

Q1. What is basic of c
Ans. 
Basics of C include syntax, data types, variables, functions, and control structures.
• C is a procedural programming language

• Variables must be declared before use

• Functions are blocks of code that perform a specific task

• Control structures include if-else, loops, and switch-case

• Data types in C include int, float, char, etc.
Answered by AI
Add your answer
Q2. What is basic of embedded
Ans. 
Embedded systems are specialized computing systems designed to perform specific tasks within a larger system.
• Embedded systems are typically designed to be small, efficient, and reliable.

• They often have limited resources such as memory, processing power, and energy.

• Examples of embedded systems include microcontrollers in household appliances, automotive control systems, and industrial automation.

• Embedded software is spe...read more
Answered by AI
Add your answer
Q3. What is basic of contoller
Ans. 
The basic of a controller is to manage and regulate the operation of a system or device.
• Controllers receive input signals and process them to generate output signals.

• They can be programmed to perform specific tasks or functions.

• Examples include microcontrollers, PLCs, and PID controllers.
Answered by AI
Add your answer

Q1. Volatile keyword
Add your answer
Q2. Project specific
Add your answer

Q1. Salary expectations
Add your answer
Q2. Reason for job change
Add your answer

Percentage, speed, series, logical abulity, differnces

Q1. C programs, protocols, Embedded C, pointers
Add your answer
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
Answered by AI
Add your answer
Q3. I2c, can, spi, uart
Add your answer

Q1. Normal hr questions
Add your answer
Q2. Self, company details
Add your answer

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
Add your answer

Q1. Discuss about offer letter
Add your answer

Very basic c questions like an array

Q1. Compilation process in c
Ans. 
Compilation process in C involves preprocessing, compiling, assembling, and linking.
• Preprocessing: Includes header files, macro expansions, and conditional compilation.

• Compiling: Translates source code to assembly code specific to the target architecture.

• Assembling: Converts assembly code to machine code in object files.

• Linking: Combines object files and libraries to generate an executable file.
Answered by AI
Add your answer
Q2. Write a function pointer syntax?
Ans. 
Function pointer syntax allows for storing the address of a function in a pointer variable.
• Syntax: return_type (*pointer_name)(parameters)

• Example: void (*funcPtr)(int) = &someFunction;
Answered by AI
Add your answer
Q3. Discussion on current project?
Add your answer
Q4. Reverse the string?
Ans. 
Reverse a given string
• Use a loop to iterate through the characters of the string

• Swap the characters from start to end of the string

• Continue swapping until reaching the middle of the string
Answered by AI
Add your answer
Q5. Set , clear and toggle the bit
Add your answer

Q1. Mostly salary discussion
Add your answer
Q2. Tell about yourself
Add your answer

Q1. Linked list related questions
Add your answer
Q2. Memory allocation in c
Ans. 
Memory allocation in C involves dynamically allocating and deallocating memory during program execution.
• Memory allocation in C is done using functions like malloc, calloc, realloc, and free.

• malloc function is used to allocate a block of memory of a specified size.

• calloc function is used to allocate a block of memory for an array of elements, initializing all bytes to zero.

• realloc function is used to resize a previously...read more
Answered by AI
Add your answer