Techatcore Interview Questions and Answers

Single linked list has one pointer while doubly linked list has two. Doubly linked list is preferred for easier traversal in both directions.

• Single linked list has only one pointer which points to the next node while doubly linked list has two pointers which point to the next and previous nodes.

• Doubly linked list allows for easier traversal in both directions, while single linked list only allows for traversal in one direction.

• Doubly linked list requires more memory due to th...read more

Sorting techniques and their time complexity

• Bubble sort - O(n^2)

• Selection sort - O(n^2)

• Insertion sort - O(n^2)

• Merge sort - O(n log n)

• Quick sort - O(n log n)

• Heap sort - O(n log n)

• Radix sort - O(nk)

• Most efficient: Quick sort or Merge sort

• Efficiency depends on the size of the array and the data distribution

Big data refers to large and complex data sets that cannot be processed using traditional data processing methods.

• Big data is characterized by the 3Vs - volume, velocity, and variety.

• It requires specialized tools and techniques for processing and analysis.

• Examples of big data include social media data, sensor data, and financial market data.

LINUX/UNIX are open-source, command-line based OS while WINDOWS is a proprietary, GUI-based OS.

• LINUX/UNIX have a steep learning curve due to command-line interface

• WINDOWS is more user-friendly with a graphical user interface (GUI)

• LINUX/UNIX are more stable and secure than WINDOWS

• LINUX/UNIX are free and open-source while WINDOWS is proprietary and requires a license

• LINUX/UNIX are preferred for servers and development while WINDOWS is preferred for personal computers and gaming

ASP.net is better for enterprise-level applications due to its integration with Windows and Microsoft technologies.

• ASP.net has better integration with Windows and Microsoft technologies

• ASP.net has better performance and scalability for enterprise-level applications

• ASP.net has a larger developer community and more resources available

• Java is better for cross-platform development and open-source projects