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

A dangling pointer is a pointer that points to a memory location that has been deallocated, leading to undefined behavior.

• Dangling pointers can occur when memory is freed but the pointer is not set to NULL.

• Accessing a dangling pointer can result in crashes or unexpected behavior.

• Example: int *ptr = new int; delete ptr; // ptr is now a dangling pointer

Structure is a user-defined data type that allows storing different types of data in a single variable, while union is a data type that allows storing only one type of data at a time.

• Structure allows storing different types of data in a single variable, while union allows storing only one type of data at a time.

• In a structure, each member has its own memory location, while in a union, all members share the same me...read more

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

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.