Microservices Review

What is the primary role of the Kubernetes scheduler?

• It manages the storage of persistent data.

• It assigns Pods to nodes based on resource availability.

• It monitors network traffic.

• It updates the Kubernetes API server.

What does Node Affinity in Kubernetes help with?

• It enables Pods to communicate with each other securely.

• It automatically scales Pods based on resource usage.

• It manages the security of Pods across nodes.

• It determines the placement of Pods based on node labels.

When should you use Taints and Tolerations versus Node Affinity in Kubernetes?

• Use Taints and Tolerations for pod-to-node placement based on specific conditions; use Node Affinity for specifying preferred or required node attributes.

• Taints and Tolerations are used for pod scheduling, while Node Affinity handles pod health checks.

• Node Affinity is used for resource requests, and Taints and Tolerations manage pod scaling.

• Taints and Tolerations are for pod security, and Node Affinity is used for monitoring network traffic.

What is the purpose of a Namespace in Kubernetes?

• It separates the storage resources of different Pods.

• It defines the boundaries for network policies.

• It provides a way to divide cluster resources between multiple users or teams.

• It manages the lifecycle of services within the cluster.

What is the key characteristic of symmetric encryption?

• It uses a pair of public and private keys for encryption and decryption.

• It encrypts data using multiple keys for higher security.

• It requires no key for encryption or decryption.

• It uses the same key for both encryption and decryption.

What is the key characteristic of asymmetric encryption?

• It uses the same key for both encryption and decryption.

• It uses a public key to encrypt and a private key to decrypt.

• It encrypts data with a symmetric key, then encrypts the symmetric key with a public key.

• It does not require any key for encryption.

What is the main purpose of aTLS/SSL digital certificate?

• To authenticate the identity of a website and enable encrypted communication.

• To encrypt the entire network traffic between a client and a server.

• To provide a public key for securely exchanging data between two parties.

• To monitor the performance of network services.

What is the main difference between authentication and authorization?

• Authentication determines what resources you can access, while authorization verifies your identity.

• Authentication is about verifying your identity, and authorization is about determining what resources you can access.

• Authentication requires a password, while authorization requires a fingerprint scan.

• Authentication is used for network security, while authorization is only for web applications.

What is the primary principle behind ABAC (Attribute-Based Access Control)?

• Access is determined based on the user's role within the organization.

• Access is based solely on the user's authentication level.

• Access is controlled by the network administrator's permissions only.

• Access is granted based on the evaluation of attributes (such as user, resource, and environment attributes).

What is the primary purpose of the SAGA pattern in microservices?

• To ensure distributed transactions are handled with a series of local transactions, each with compensation in case of failure.

• To improve the performance of network communication between microservices.

• To simplify the orchestration of microservices through a single centralized service.

• To securely encrypt communication between microservices.