Serverless computing, often referred to as Function as a Service (FaaS), abstracts the infrastructure, allowing developers to focus solely on code. It provides an environment for writing and deploying software without concerns about the hardware.

The term is "Resource Termination." Cloud cost optimization involves turning off or decommissioning unused resources, such as virtual machines or storage, to reduce costs. This is a crucial practice in cloud economics.

Message Queues are essential for ensuring transaction integrity in distributed systems. They allow messages to be sent, stored, and retrieved in a reliable and orderly manner, ensuring that transactions are processed in a consistent and orderly way.

MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol that enables devices to gather and exchange data over the internet. This data can be transmitted to the cloud for processing and analysis. MQTT is commonly used in IoT applications.

Virtualization technology enables multiple virtual machines (VMs) to run on a single physical machine, abstracting and isolating each VM from the host hardware. This enables efficient resource utilization and isolation.

Etcd is a distributed key-value store used in Kubernetes to store all configuration data, which ensures high availability and consistency. It's crucial for maintaining a shared configuration and service discovery among all nodes in the cluster.

The correct option is 'Hypervisor.' A hypervisor is a type of virtualization technology that allows a single physical machine to run multiple virtual machines. These virtual machines, or VMs, are isolated from each other and from the host system. The hypervisor controls and allocates hardware resources to these VMs, making it an efficient solution for server virtualization. Virtual Private Networks (VPNs) are not related to machine virtualization. Emulation often replicates a specific environment for compatibility, while containerization is a different virtualization method where applications share the same OS kernel.

GDPR, Article 22, grants users the right to request an explanation for automated decisions that significantly affect them. This ensures transparency and accountability in cases where algorithms or AI systems are used for decision-making.

The blank should be filled with "Rehosting." Rehosting is a migration strategy where applications are moved to the cloud with minimal changes, offering a faster migration but not leveraging cloud-native capabilities.

The primary focus of cost management tools in cloud computing is to track resource usage and optimize spending. These tools provide insights into how cloud resources are utilized and help organizations make informed decisions to minimize unnecessary expenses.