20 Oracle Cloud Infrastructure Interview Questions and Answers

Oracle Cloud Infrastructure (OCI) is a cloud computing service provided by Oracle Corporation. It offers users a variety of services, including compute, storage, networking, and database. Users can access OCI through a web console or a REST API.

If you’re interviewing for a position that involves Oracle Cloud Infrastructure, you’re likely to be asked questions about your experience with the platform. In this article, we’ll review some of the most common OCI interview questions and provide guidance on how to answer them.

Oracle Cloud Infrastructure Interview Questions and Answers

Here are 20 commonly asked Oracle Cloud Infrastructure interview questions and answers to prepare you for your interview:

1. What is Oracle Cloud Infrastructure?

Oracle Cloud Infrastructure is a cloud computing service offered by Oracle Corporation. It is a platform as a service that provides users with a variety of cloud-based services, including compute, storage, networking, database, and application services.

2. What are the various components involved in Oracle Cloud Infrastructure?

The various components involved in Oracle Cloud Infrastructure are the compute service, the storage service, the networking service, and the identity service.

3. Can you explain what an Availability Domain is?

An Availability Domain is a single data center within Oracle Cloud Infrastructure. It is made up of a cluster of servers, storage, and networking resources that are isolated from other Availability Domains.

4. What’s the difference between a compute instance and a virtual machine?

A compute instance is a cloud resource that you can use to host your applications, while a virtual machine is a software emulation of a physical machine.

5. How do you create an image of your compute instance using Oracle Cloud Infrastructure?

You can create an image of your compute instance using Oracle Cloud Infrastructure by using the Console or the API. To create an image using the Console, first stop the instance that you want to image. Then, go to the Images section of the Console and click the Create Image button. Enter the required information and click the Create Image button. To create an image using the API, use the CreateImage operation.

6. Is it possible to increase the size of a volume attached to a running compute instance? If yes, then can you tell me how?

Yes, it is possible to increase the size of a volume attached to a running compute instance. You can do this by using the Oracle Cloud Infrastructure Console or the API.

7. Is there any limit on the number of volumes that can be attached to a single compute instance? If yes, then what is the maximum allowed number of volumes?

Yes, there is a limit on the number of volumes that can be attached to a single compute instance. The maximum number of volumes allowed is eight.

8. Is it possible to use multiple files or folders when creating a persistence volume? If yes, then how?

Yes, it is possible to use multiple files or folders when creating a persistence volume. You can do this by creating a mount point for each file or folder that you want to use.

9. Do I need to have SSH access enabled for my compute instance in order to attach a persistent volume?

No, you do not need to have SSH access enabled for your compute instance in order to attach a persistent volume. You can attach a persistent volume to your compute instance through the Oracle Cloud Infrastructure Console.

10. Why do you think it’s important to always back up your data before performing maintenance operations on your cloud infrastructure?

There are a few reasons why it’s important to always back up your data before performing maintenance operations on your cloud infrastructure. First, it’s always a good idea to have a backup in case something goes wrong during the maintenance operation. Second, if you’re performing a major operation that could potentially delete or corrupt data, having a backup will ensure that you have a copy of the data that you can fall back on. Finally, if you’re performing an operation that could potentially cause downtime, having a backup will ensure that you have a copy of the data that you can use to keep your business running while the maintenance is being performed.

11. What does the Load Balancing service provided by OCI do?

The Load Balancing service provides a way to distribute traffic across a group of compute instances in order to improve performance and availability. By using a load balancer, you can ensure that your compute instances are able to handle the traffic they are receiving, and you can also provide a level of redundancy in case one of your instances goes down.

12. What is the main advantage of using the DNS service provided by Oracle Cloud Infrastructure?

The main advantage of using the DNS service provided by Oracle Cloud Infrastructure is that it is highly available and scalable. The DNS service is designed to handle large amounts of traffic and can easily scale to meet the needs of your application.

13. What is the purpose of the “Caching Security Rules” feature present in the WAF Management Console?

The “Caching Security Rules” feature allows you to cache the results of WAF evaluations for a period of time, so that subsequent requests for the same resources can be served more quickly. This can be helpful in reducing the load on your WAF and improving performance.

14. What is the method used by the FastConnect facility to connect two networks across public internet?

The FastConnect facility uses a technique called “virtual private networking” (VPN) to connect two networks across the public internet. VPNs use a combination of encryption and tunneling to create a secure, private connection between two networks.

15. What are some advantages of using Oracle Cloud Infrastructure over Amazon Web Services?

Some advantages of using Oracle Cloud Infrastructure over Amazon Web Services include:

– Oracle Cloud Infrastructure is designed to be highly compatible with on-premises Oracle software and hardware, making it easier to migrate workloads to the cloud.

– Oracle Cloud Infrastructure offers a pay-as-you-go pricing model, so you only pay for the resources you use.

– Oracle Cloud Infrastructure provides a comprehensive set of services for building, deploying, and managing cloud-based applications.

16. What happens if you exceed the capacity of your storage space?

If you exceed the capacity of your storage space, you will not be able to write any more data to the storage until you free up some space.

17. Can you give me examples of where I would use block storage as opposed to object storage?

Block storage is well suited for applications that require low latency, such as databases or virtual machines. Object storage is better suited for storing large amounts of data that is infrequently accessed.

18. What should I do if my compute instance doesn’t start after rebooting?

If your compute instance doesn’t start after rebooting, the first thing you should check is the status of the instance. You can do this by logging into the Oracle Cloud Infrastructure console and checking the instance’s status. If the instance is in a stopped state, you will need to start it manually.

If the instance is in a running state, but you are still unable to connect to it, you should check the security groups associated with the instance. Make sure that the security groups are configured correctly and that they allow traffic on the port you are trying to connect to.

19. What is the best way to estimate costs for services like computing instances, load balancers, etc.?

The best way to estimate costs for services like computing instances and load balancers is to use the Oracle Cloud Infrastructure Pricing Calculator. This tool allows you to input the specific details of your infrastructure requirements and provides an estimate of the monthly cost.

20. What does a Virtual Private Cloud (VPC) consist of?

A VPC is a private, isolated section of the Oracle Cloud Infrastructure (OCI) that you can launch resources into. A VPC allows you to have full control over your virtual networking environment, including your own IP address range, subnets, route tables, and network gateways.