CSM Technologies Senior Software Engineer Interview Questions, Process, and Tips

Some strategies to optimize a database query include indexing, using proper data types, limiting the result set, and optimizing joins.

• Use indexes on columns frequently used in WHERE clauses

• Avoid using SELECT * and only retrieve necessary columns

• Use appropriate data types to minimize storage space and improve query performance

• Limit the result set by using LIMIT or TOP clause

• Optimize joins by using INNER JOIN instead of

Comparator is used to compare two objects for sorting, while Comparable is implemented by a class to define its natural ordering.

• Comparator is used when the class being compared does not implement Comparable interface

• Comparable is implemented by a class to define its natural ordering

• Comparator can be used to sort objects in different ways, not just the natural ordering defined by Comparable

Design patterns are reusable solutions to common problems in software design.

• Design patterns help in creating flexible, maintainable, and scalable software systems.

• Some common design patterns include Singleton, Factory, Observer, and Strategy.

• Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Factory pattern creates objects without specifying the exact class of object th...read more

Python has dynamic typing, meaning you don't have to declare the data type of a variable before using it.

• Python is dynamically typed, so variables can hold different types of data without explicit declaration.

• Common data types in Python include integers, floats, strings, lists, tuples, dictionaries, and sets.

• You can use the type() function to check the data type of a variable.

• Example: x = 5 (integer), y = 3.14 (float),