Explanation
This configuration will not achieve fault tolerance for managers in a swarm, because having only two managers creates a risk of losing quorum if one manager fails or becomes unavailable. According to the official documentation, having two managers also does not provide any benefits over having one manager, since both managers must be available for any management operations.
References: https://docs.docker.com/engine/swarm/admin_guide/#add-manager-nodes-for-fault-tolerance

Explanation
Storage is not a type of Linux kernel namespace that provides container isolation. Namespaces are a Linux kernel feature that provide isolation and virtualization of system resources for processes. They can be used to create isolated environments for containers that have their own view of system resources, such as process IDs, user IDs, network interfaces, etc. However, there is no storage namespace in Linux. The types of namespaces that exist are mount (mnt), process ID (pid), network (net), interprocess communication (ipc), user ID (user), control group (cgroup), time (time), and user namespace (uts). References:
https://docs.docker.com/engine/security/userns-remap/,
https://man7.org/linux/man-pages/man7/namespaces.7.html

Explanation
Label constraints can be used to schedule containers to meet the security policy requirements. Label constraints are expressions that match node labels to service labels. Node labels are key-value pairs that can be attached to nodes to identify them by certain characteristics, such as role, environment, region, etc. Service labels are key-value pairs that can be attached to services to specify scheduling preferences or requirements, such as node.role == manager or environment != production. Label constraints can be used with the
--constraint flag when creating or updating a service to ensure that the service's containers are scheduled on nodes that match the specified criteria. References:
https://docs.docker.com/engine/swarm/services/#specify-service-constraints,
https://docs.docker.com/engine/swarm/manage-nodes/#add-or-remove-label-metadata

Explanation
This action will grant them read/write access to the engineering/api repository, because adding a user directly to the list of users with read/write access under the repository's Permissions tab is one way to grant permissions to a user in DTR. According to the official documentation, this is an example of using fine-grained permissions for a repository.
References: https://docs.docker.com/ee/dtr/user/manage-repos/permission-levels/

Explanation
This is not a way to accomplish this, because adding all the resources to the default namespace is not a good practice for isolating applications in Kubernetes. According to the official documentation, namespaces are used to group resources into logical units that correspond to different projects, teams, or environments. Using namespaces can help avoid naming collisions and enforce resource quotas and access policies.
References: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/