Which of the following is a common security concern in multi-tenant cloud environments?

In a multi-tenant cloud environment, multiple customers share the same infrastructure and resources. A primary security concern in this context is data isolation. Ensuring that one tenant's data cannot be accessed or affected by another tenant is crucial for maintaining confidentiality and privacy. This concern arises from the inherent risk that vulnerabilities or misconfigurations could allow unauthorized access to sensitive data belonging to other tenants sharing the same physical resources or storage systems.

Effective data isolation mechanisms are essential to prevent cross-tenant data leakage and to comply with legal and regulatory requirements regarding data protection. Techniques such as strong access controls, data encryption, and virtualization can help mitigate these risks, making data isolation a top priority in securing multi-tenant environments.