HCL Infosystems Oracle Database Administrator Interview Questions and Answers

I have worked on various projects including web development, mobile app development, and data analysis.

• Developed a web application using React and Node.js for a client in the healthcare industry

• Created a mobile app using Flutter for a startup in the travel industry

• Analyzed data using Python and SQL to improve customer retention for an e-commerce company

Quicksort has an average and best-case time complexity of O(n log n) and worst-case of O(n^2).

• Quicksort is a divide-and-conquer algorithm that recursively partitions an array into two sub-arrays based on a pivot element.

• The average and best-case time complexity is O(n log n) because each partition divides the array into roughly equal halves.

• The worst-case time complexity is O(n^2) when the pivot element is the smallest...read more

Cordova is a mobile application development framework that allows developers to build apps using web technologies.

• Cordova enables developers to create cross-platform mobile apps using HTML, CSS, and JavaScript.

• It provides access to native device APIs, allowing developers to use device features like camera, accelerometer, etc.

• Cordova apps can be built for multiple platforms like iOS, Android, Windows, etc.

• It was previou...read more