L&T Technology Services Software Engineer Interview Questions and Answers

I utilized various programming languages and tools to develop a robust software project, focusing on efficiency and scalability.

• Languages used: Python for backend development, JavaScript for frontend.

• Frameworks: Django for server-side logic, React for building user interfaces.

• Database: PostgreSQL for data storage and management.

• Tools: Git for version control, Docker for containerization, and Jenkins for CI/CD.

malloc is a function in C programming used to dynamically allocate memory during runtime.

• malloc stands for 'memory allocation'.

• It is used to allocate a specific amount of memory during program execution.

• The allocated memory is not automatically initialized and must be manually managed.

• Example: int *ptr = (int*) malloc(5 * sizeof(int));

A null pointer is a pointer that does not point to any memory location.

• Null pointers are used to represent that a pointer does not point to a valid object or memory location.

• Attempting to dereference a null pointer can result in a segmentation fault or program crash.

• Null pointers are commonly used in programming languages like C and C++.

• Example: int* ptr = nullptr; // ptr is a null pointer

Free refers to something that is given or available without cost or payment.

• Free products or services do not require any payment.

• Free can also refer to freedom or liberty, such as free speech or free will.

• Free can also mean available for use without restrictions, like open-source software.

Technical questions related to programming concepts and recursion

• Pointers are variables that store the memory address of another variable

• Functions are blocks of code that perform a specific task

• OOPS is a programming paradigm that uses objects to represent real-world entities

• Factorial using recursion: int factorial(int n) { if(n==0) return 1; else return n*factorial(n-1); }

Logic design in MATLAB involves creating logical circuits using MATLAB programming language.

• Use logical operators such as AND, OR, NOT, XOR to create logical circuits

• Implement truth tables to verify the logic design

• Simulate the logic design using MATLAB's Simulink tool

• Debug the logic design using MATLAB's debugging tools