VVDN Technologies Interview Questions, Process, and Tips for Experienced

Machining all types involves using various tools and techniques to shape and cut materials into desired shapes and sizes.

• Machining can be done on materials like metal, plastic, wood, and ceramics.

• Common machining techniques include drilling, milling, turning, and grinding.

• CNC machines are often used for precision machining.

• Examples of machined products include engine parts, computer components, and furniture.

Memory layout in a C binary refers to how different types of data are stored in memory.

• Memory layout includes sections like text (code), data, bss, heap, and stack.

• Global variables are stored in data section, uninitialized global variables in bss section.

• Dynamic memory allocation using malloc() and calloc() is stored in heap section.

• Local variables and function call information are stored in stack section.

• Example: int ...read more

Structures are used to store different data types under one name, while unions allow different data types to be stored in the same memory location.

• Structures allocate memory for each member separately, while unions share the same memory location for all members.

• Structures are used when all members need to be accessed independently, while unions are used when only one member needs to be accessed at a time.

• Example: struc...read more

Program to reverse a string without using string library functions.

• Create a function that takes an input string as an array of characters.

• Use two pointers, one at the beginning and one at the end of the array, swap the characters and move the pointers towards each other until they meet.

• Handle edge cases like empty string or strings with odd number of characters.

Storage classes in C determine the scope, lifetime, and visibility of variables.

• Storage classes include auto, register, static, extern, and typedef.

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

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

• Static variables have global scope but limited visibility.

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

• Typedef is used to cre

Program to implement linked list using dynamic memory allocation

• Allocate memory for each node using malloc() function

• Use pointers to link nodes together

• Free memory using free() function to avoid memory leaks