10+ Oracle Senior Devops Engineer Interview Questions and Answers

Scan VIP is used for load balancing traffic to multiple nodes, while Node VIP is assigned to a specific node for direct access.

• Scan VIP is a virtual IP address used for load balancing traffic across multiple nodes in a cluster.

• Node VIP is a virtual IP address assigned to a specific node in the cluster for direct access.

• Scan VIP is typically used for services that need to be highly available and distributed across multiple nodes.

• Node VIP is used when direct access to a specifi...read more

Troubleshooting crashloop error in Kubernetes involves checking pod logs, examining resource limits, and verifying configuration files.

• Check pod logs to identify the cause of the crashloop.

• Examine resource limits to ensure the pod has enough resources to run.

• Verify configuration files for any errors or misconfigurations.

• Use kubectl commands like describe, logs, and exec to troubleshoot further.

• Consider checking for issues with persistent volumes or network connectivity.

Use the lsof command to list all files held by a process

• Use the lsof command followed by the -p flag and the process ID to list files held by a specific process

• For example, to list all files held by process ID 1234, run: lsof -p 1234

• You can also use the -c flag to specify a process name instead of ID, like: lsof -c chrome

The master switch in Exadata can be identified by checking the status of the cell server software.

• Check the status of the cell server software using the 'cellcli' command

• The cell server with the 'MS' role is the master switch

• The master switch can also be identified by checking the 'cellinit.ora' file

Spine switch and leaf switch are networking components in Exadata used for connecting database servers and storage servers.

• Spine switch acts as the core of the network, connecting all leaf switches and providing high-speed connectivity.

• Leaf switches connect database servers and storage servers to the spine switch, facilitating communication between them.

• Exadata uses a leaf-spine network architecture for efficient data transfer and scalability.

• Spine switches typically have hig...read more

Quarantile in Exadata is a feature that isolates problematic cells to prevent them from affecting the rest of the system.

• Quarantile is a feature in Exadata that identifies and isolates cells that are experiencing issues or failures.

• It helps prevent the spread of issues to other cells in the system, ensuring high availability and performance.

• Quarantiled cells are still accessible for diagnosis and maintenance, but are not actively used for processing.

• Examples of issues that ma...read more

Kubernetes (k8s) fundamentals and role of each component

• Kubelet - agent that runs on each node in the cluster and ensures containers are running

• Kube-proxy - network proxy that maintains network rules on nodes

• Kubernetes API server - central management entity that serves the Kubernetes API

• etcd - distributed key-value store used for storing cluster data

• Kube-controller-manager - runs controller processes to manage the state of the cluster

• Kube-scheduler - assigns workloads to node...read more

Terraform modules are reusable components that can be used to create infrastructure resources.

• Modules are collections of .tf files that define resources and their dependencies

• They can be used to create reusable infrastructure code

• Modules can be published to the Terraform Registry for others to use

• They can be used to create complex infrastructure setups easily

ipconf.pl is a Perl script used for configuring network interfaces on Linux systems.

• ipconf.pl is typically used to set up IP addresses, netmasks, gateways, and DNS servers on Linux machines.

• It can be used to automate the configuration of network interfaces during system setup or maintenance.

• The script may also be used to troubleshoot network connectivity issues by checking and modifying network settings.

• ipconf.pl is often customized to meet specific network requirements or co...read more

Inodes are data structures in Unix-like file systems that store metadata about files, such as permissions, ownership, and location.

• Inodes contain information about files, such as file size, permissions, timestamps, and pointers to data blocks.

• Each file in a Unix-like file system is represented by an inode.

• Inodes are used to efficiently locate and manage files on the file system.

• When a file is created, an inode is also created to store its metadata.

• Inodes are identified by a u...read more