HCLTech Embedded Software Engineer Interview Questions, Process, and Tips

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

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

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.

I chose HCl for its versatility and effectiveness in various applications.

• HCl is commonly used in industries such as pharmaceuticals, food processing, and chemical manufacturing.

• It is a strong acid that can be used for pH control, cleaning, and as a catalyst in chemical reactions.

• HCl is also used in the production of PVC, fertilizers, and dyes.

• Its ability to dissolve metals makes it useful in metal cleaning and etching

C programming memory structure involves stack, heap, data, and code segments.

• Stack: Used for local variables and function call management.

• Heap: Used for dynamic memory allocation.

• Data: Contains global and static variables.

• Code: Contains the program's executable code.

Storage classes in C define the scope and lifetime of variables.

• There are four storage classes in C: auto, register, static, and extern.

• Auto variables are stored in the stack and have local scope.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared in one file and can be accessed in another file.