Siemens Industry Software (India) Senior Software Engineer Interview Questions, Process, and Tips

A stack is a data structure that follows the Last In First Out (LIFO) principle.

• Stack is a collection of elements with two main operations: push (adds element) and pop (removes top element)

• Common implementations include using arrays or linked lists

• Example: Undo feature in text editors uses a stack to store previous states

Optimizing a stack involves reducing unnecessary operations and improving memory usage.

• Implementing tail call optimization to reduce stack space usage

• Using iterative algorithms instead of recursive ones to avoid stack overflow

• Minimizing the number of local variables stored on the stack

• Using dynamic memory allocation instead of fixed-size arrays to optimize memory usage

Use a JOIN statement to combine data from two tables without a common column.

• Use a JOIN statement to combine data from two tables based on a different column

• Specify the columns to select from each table in the query

• Use aliases to differentiate between columns with the same name in different tables

Design a flight booking system with user authentication, flight search, booking, seat selection, and payment handling.

• Implement user authentication for secure access.

• Create a database of flights with availability and pricing.

• Allow users to search for flights based on criteria like date, destination, and number of passengers.

• Provide seat selection options for users during booking.

• Include a payment gateway for secure tra...read more