Please answer all the MCQs.

51. Which can not be a valid attribute for entity "Product"? * A) Name B) Price C) Designation D) Number of products available 52. Which concept is not related to Data Warehouse? * A) Data Mining B) Traditional Data Processing C) Data Mart D) Data Cube 53. NSU Course Registration System is an example of: * A) Internet B) Extranet C) Intranet D) Virtual Private Network 54. How can an organization protect the network asset from external intruders? * A) Using redundant hardware B) Uninterrupted power supply C) Firewall D) Disaster Recovery Plan 55. Which one of the following is the biggest threat for NSU's business continuity? * A) Flood B) Earthquake C) Thunderstorm D) Heavy rain 56. Which one is true from the following? * A) E-Business E-Trade > E-Commerce C) E-Business > E-Commerce > E-Marketing D) E-Business