ICE Data Services Senior Software Engineer Interview Questions and Answers

Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.

• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing mock dependencies.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.

State in React is a JavaScript object that stores data and determines how a component renders and behaves.

• State is mutable and can be updated using the setState() method

• State should be used for data that will change over time and affect the component's rendering

• State should not be modified directly, use setState() instead

OOPS concepts refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation detail...read more

Solid concepts are fundamental principles or ideas that are well-established and widely accepted in a particular field.

• Solid concepts provide a strong foundation for further learning and development.

• They are essential for understanding complex topics and solving problems effectively.

• Examples of solid concepts in software engineering include object-oriented programming, design patterns, and data structures.

Code to check if a string is a palindrome or not.

• Iterate through the string from both ends and compare characters.

• Use two pointers, one starting from the beginning and one from the end.

• If characters at both pointers are equal, move both pointers towards the center.

• If characters at any point are not equal, return false.

• If both pointers meet in the middle, return true as the string is a palindrome.

Yes, I've encountered OutOfMemoryError and resolved it through various strategies like optimizing memory usage and increasing heap size.

• Identified memory leaks using profiling tools like VisualVM or YourKit.

• Optimized data structures, e.g., using ArrayList instead of LinkedList for better memory efficiency.

• Increased JVM heap size with -Xmx option based on application needs.

• Implemented caching strategies to reduce memory...read more

Text data can be loaded into DB systems using various methods such as SQL INSERT statements, bulk loading, or ETL processes.

• Use SQL INSERT statements to insert text data into the database one record at a time.

• For large datasets, consider using bulk loading techniques like BULK INSERT or LOAD DATA INFILE.

• ETL (Extract, Transform, Load) processes can be used to extract text data from different sources, transform it as per...read more