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10+ Oracle Senior Devops Engineer Interview Questions and Answers

Updated 31 Jan 2025

Q1. What is the difference between scan vip & node vip?

Ans.

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

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Q2. How can one troubleshoot the crashloop error in Kubernetes (k8s)?

Ans.

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.

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Q3. How do you list all the files held by a process

Ans.

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

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Q4. How to identify the master switch in Exadata?

Ans.

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

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Q5. What is spine switch & leaf switch in exadata?

Ans.

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

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Q6. What is quarantile in Exadata?

Ans.

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

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Q7. k8s fundamentals. Role of each component

Ans.

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

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Q8. What are terraform modules

Ans.

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

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Q9. What is ipconf.pl?

Ans.

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

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Q10. What are inodes?

Ans.

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

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Q11. container vs Virtaul Machines?

Ans.

Containers are lightweight, portable, and efficient, while virtual machines are more isolated and resource-intensive.

  • Containers share the host OS kernel, making them more lightweight and faster to start compared to VMs.

  • VMs provide stronger isolation and security by running a separate OS instance for each VM.

  • Containers are ideal for microservices architecture and rapid deployment, while VMs are better for running multiple applications with different OS requirements.

  • Examples: D...read more

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