71、 Big data can be described by four characteristics: Volume, Variety, Velocity and Veracity. （  ） refers to the quantity of generated and stored data。

A. Volume

B. Variety

C. Velocity

D. Veracity

72、（  ） is the extension of internet connectivity into physical devices

and everyday objects. Embedded with electronics, internet connectivity, and other forms of hardware (such as sensors), these devices can communicate and interact with others over the Internet, and they can be remotely monitored and controlled.

A.Cloud Computing

B.Internet of Things

C.Block Chain

D.Artificial Intelligence

73、（  ）is a process of developing a document that formally authorizes the existence of a project and provides the project manager with the authority to apply organizational resources to project activities。

A. Develop Project Charter

B. Manage Project Knowledge

C. Monitor and Control Project Work

D. Close Project

74、（  ） is a process of developing a detailed description of the project

and product。

A.Collect Requirements

B.Define Scope

C.Validate Scope

D.Control Scope

75、（  ）is a process of monitoring the status of the project to update

the project costs and manage changes to the cost baseline。

A.Plan Cost Management

B. Estimate Costs

C.Determine Budget

D.Control Costs