A workload is a unit of processing, which can be in a virtual machine, a container, or other abstraction.
Workloads always run somewhere on a processor and consume memory. Workloads include a very diverse range of processing tasks, which range from traditional applications running in a virtual machine on a standard operating system, to GPU- or FPGA-based specialized tasks Reference: CSA Security Guidelines V.4(reproduced here for the educational purpose)

It is false.
Customer will have to take permission and give notification to cloud service provider.
The cloud owner (public or private) will typically require notification of assessments and place limits on the nature of assessments. This is because they may be unable to distinguish an assessment from a real attack without prior warning.
Ref: CSA Security Guidelines V4.0

It is the definition of Data breach. It should not be confused with data disclosure. The incident can lead to information disclosure but incident, itself, will be termed as Data Breach.

Digital rights management(DRM)was designed to focus on security and encryption as a means of preventing unauthorized copying and limitations on distribution of content to only those authorized(purchasers).