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NEW QUESTION # 28
Which TWO statements are NOT correct regarding the Oracle Cloud Infrastructure (OCI) burstable instances?
Answer: B,D
Explanation:
The following statements about OCI burstable instances areNOT correct:
* A. Burstable instances cost less than regular instances:This is incorrect because burstable instances are not necessarily cheaper; the cost depends on the baseline utilization. While they allow for cost efficiency when running at a lower CPU baseline, they can become more expensive if frequently bursting above the baseline.
* B. Burstable instances are charged according to the baseline OCPU:This is incorrect because burstable instances are billed based on actual OCPU usage, which includes both baseline and burst usage. If an instance frequently operates above its baseline, the cost will reflect this higher usage.
Correct Concepts:
* C.Burstable instances can temporarily use more CPU than their baseline if the average CPU utilization is below the baseline.
* D.Baseline utilization is a fraction of each CPU core, which determines the level of consistent performance available without bursting.
References:
* Oracle Cloud Infrastructure Documentation:Burstable Instances
NEW QUESTION # 29
Which of the following is a valid RFC 1918 CIDR prefix that can be used for creating an Oracle Cloud Infrastructure (OCI) Virtual Cloud Network (VCN)?
Answer: C,D
Explanation:
RFC 1918 defines IP address ranges that are reserved for private networks, which cannot be routed on the public internet. In Oracle Cloud Infrastructure (OCI), these private IP address ranges can be used to create Virtual Cloud Networks (VCNs). The valid RFC 1918 CIDR prefixes include:
* 192.168.0.0/16: A private IP range often used in home networks.
* 10.0.0.0/8: A large private IP range commonly used in enterprise networks.
Invalid Options:
* B. 0.0.0.0/0: This CIDR represents all IP addresses and is not a valid private IP range.
* C. 192.268.0.0/24: This is not a valid IP address range as the octet "268" is outside the allowable range of 0-255.
References:
* Oracle Cloud Infrastructure Documentation:VCN Overview
* RFC 1918: Address Allocation for Private Internets
NEW QUESTION # 30
You want to protect your VM instance from low-level threats, such as rootkits and bootkits. What should you do?
Answer: A
NEW QUESTION # 31
How can OCI IAM be configured to facilitate cross-region access?
Answer: B
NEW QUESTION # 32
A financial firm is designing an application architecture for its online trading platform that should have high availability and fault tolerance. What should the architect do to avoid any costly service disruptions and ensure data durability?
Answer: B
Explanation:
For an online trading platform requiring high availability and fault tolerance, it's critical to ensure data durability and avoid any costly service disruptions. In Oracle Cloud Infrastructure (OCI), Object Storage is often used to store critical data, such as transaction logs or user data, due to its scalability, durability, and reliability.
Option Bis the most suitable approach for ensuring data durability and availability across regions. Here's why:
* Cross-Region Replication (CRR):OCI offers a feature called Cross-Region Replication for Object Storage. This feature allows you to automatically and asynchronously replicate objects in a bucket from one OCI region to another. This setup ensures that even if one region experiences a failure, the data is still available in another region, thereby meeting the requirements for high availability and fault tolerance.
* Data Durability:By replicating data to another region, you protect against regional outages. OCI guarantees 99.95% availability for replicated data, which is critical for a financial firm's trading platform where data consistency and durability are paramount.
* Disaster Recovery:With data replicated in another region, the trading platform can quickly switch to using the data in the secondary region in case of a disaster in the primary region. This setup significantly reduces recovery time objectives (RTO) and ensures business continuity.
References:
* Oracle Cloud Infrastructure Documentation:Cross-Region Replication for Object Storage
* Oracle Whitepaper:High Availability and Disaster Recovery in Oracle Cloud Infrastructure Explanation of Incorrect Options:
* Option A:Creating a new Object Storage bucket in another region and configuring a recycle policy to move data every 5 days does not provide real-time data availability or the faulttolerance required for a financial application. Recycle policies are intended for managing the lifecycle of data, not for high availability or disaster recovery.
* Option C:While lifecycle policies are useful for moving less frequently accessed data to a more cost- effective storage tier (e.g., from Standard to Archive), they do not address cross-region redundancy or real-time availability, which are critical for this use case.
* Option D:Copying an Object Storage bucket to a block volume is not a recommended practice for ensuring data durability and fault tolerance. Block volumes are used for persistent storage attached to compute instances, and copying object storage data to block volumes does not achieve the same level of redundancy and cross-region availability as replication policies.
Thus,Option Bis the correct and most efficient method for ensuring high availability and fault tolerance in this scenario.
NEW QUESTION # 33
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