L&T Technology Services Senior Engineer Interview Questions and Answers

Basics of C programming include variables, data types, control structures, functions, and pointers.

• Variables are used to store data, declared with a specific data type (int, float, char, etc.)

• Control structures like if-else, loops (for, while) are used for decision making and repetition.

• Functions are blocks of code that perform a specific task, can be called multiple times.

• Pointers are variables that store memory ...read more

CCtC refers to Current Cost to Company and expected CCtC is the anticipated compensation package.

• CCtC includes salary, bonuses, benefits, and other perks.

• For example, if my current salary is $100,000 with $20,000 in benefits, my CCtC is $120,000.

• Expected CCtC can be based on market research and personal career goals.

• For instance, if similar roles in my field offer $130,000, I might expect a CCtC around that figure...read more

The different types of storage classes in C programming are auto, register, static, and extern.

• Auto storage class is the default storage class for all local variables.

• Register storage class is used to define local variables that should be stored in a register instead of RAM.

• Static storage class allows a variable to retain its value between function calls.

• Extern storage class is used to give a reference of a global...read more

Implement a C program using linked list

• Use struct to define the linked list node

• Implement functions for insertion, deletion, and traversal

• Handle edge cases like empty list or deleting the last node

The question involves determining the output for logic code on pointers.

• Pointer arithmetic can be used to access elements in an array.

• Pointers can be dereferenced to access the value they point to.

• Pointers can be used to pass variables by reference.

To convert little endian to big endian, reverse the order of bytes in the data.

• Reverse the order of bytes in the data

• For example, if you have the little endian value 0x12345678, in big endian it would be 0x78563412

Toggle the 3rd bit position in a given number using bitwise operators in C.

• Use bitwise OR operator with 0x04 to toggle the 3rd bit position.

• Example: num ^= (1 << 2) will toggle the 3rd bit position in 'num'.

Program to reverse a string without using built-in functions in C

• Create a function to reverse the string by swapping characters from start to end

• Use two pointers, one pointing to the start of the string and the other pointing to the end

• Swap the characters at the two pointers and move them towards each other until they meet in the middle