L&T Technology Services Senior Software Engineer Interview Questions and Answers

The question tests your problem-solving skills and technical knowledge in software engineering.

• Understand the problem requirements clearly before coding.

• Break down the problem into smaller, manageable parts.

• Consider edge cases and how your solution handles them.

• Optimize for performance and scalability where applicable.

• Write clean, maintainable code with proper documentation.

Discussing a recent project, focusing on challenges, technologies used, and outcomes.

• Led a team to develop a microservices-based application, improving scalability.

• Implemented CI/CD pipelines using Jenkins, reducing deployment time by 50%.

• Utilized React for the frontend, enhancing user experience with a responsive design.

• Faced challenges with legacy system integration, resolved by creating a robust API layer.

Yield keyword is used in Python to pause and resume a generator function.

• Yield keyword is used to return a value from a generator function and pause its execution.

• When the generator function is called again, it resumes from where it was paused.

• Yield can be used in a loop to generate a sequence of values without storing them all in memory.

• Example: def my_generator(): yield 1 yield 2 yield 3

Use variadic arguments in C++ to handle variable number of parameters in a function

• Use variadic arguments in C++ to create a function that can accept any number of parameters

• Example: void myFunction(int firstParam, ...)

• Access the parameters using va_list and va_start macros

• Example: va_list args; va_start(args, firstParam); int nextParam = va_arg(args, int);

• End the argument list with va_end macro

SQL join query combines data from multiple tables based on a related column, and aggregate functions perform calculations on grouped data.

• Use JOIN keyword to combine data from multiple tables based on a related column

• Use aggregate functions like SUM, AVG, COUNT, etc. to perform calculations on grouped data

• Example: SELECT orders.order_id, SUM(order_details.quantity) FROM orders JOIN order_details ON orders.order_id...read more

Reverse a linked list by changing the direction of pointers.

• Start with three pointers: current, previous, and next.

• Iterate through the linked list, updating pointers to reverse the direction.

• Return the new head of the reversed linked list.

To reverse a string, iterate through the characters and swap the characters from start to end.

• Iterate through the characters of the string

• Swap the characters from start to end until reaching the middle of the string

• Return the reversed string

Merge conflict occurs when two or more developers make changes to the same file in Git.

• It happens when two or more developers make changes to the same file in Git.

• Git is unable to automatically merge the changes and requires manual intervention.

• Developers need to resolve the conflict by choosing which changes to keep and which to discard.

• Common tools used to resolve merge conflicts include Git's command-line inter...read more