[2022年更新]合格できるOracle 1Z0-1072-20試験最新240問題
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Oracle 1Z0-1072-20 認定試験の出題範囲：
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質問 100
You are a system administrator of your company and you are asked to manage updates and patches across all your compute instances running Oracle Linux in Oracle Cloud Infrastructure (OCI). As part of your task, you need to apply all the latest kernel security updates to all instances.
Which OCI service will allow you to complete this task?
- A. Resource Manager
- B. OS Management
- C. Streaming
- D. Storage Gateway
- E. Registry
正解: B
解説:
Explanation/Reference: https://blogs.oracle.com/cloud-infrastructure/os-management-with-oracle-cloud-infrastructure
質問 101
When you try to create an instance on Oracle Cloud Infrastructure (OCI), what are three valid sources to choose the image from? (Choose three.)
- A. Platform Images
- B. Dedicated VM Host
- C. Object Storage
- D. Instance Pools
- E. Bare Metal Instance
- F. Custom Image
- G. Partner Images
正解: A,F,G
解説:
Explanation/Reference: https://docs.cloud.oracle.com/en-us/iaas/Content/Compute/Tasks/launchinginstance.htm
質問 102
Which statement is true about a pre-authenticated request in Oracle Cloud Infrastructure Object Storage?
- A. You can create only 1, 000 pre-authenticated requests per bucket.
- B. You cannot extend the expiration date on a pre-authenticated request.
- C. You can create a pre-authenticated request only for public buckets.
- D. You cannot retire a pre-authenticated request before it expires.
正解: B
解説:
Explanation
https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingpreauthenticatedrequests.htm You can create an unlimited number of pre-authenticated requests.
You can't edit a pre-authenticated request. If you want to change user access options in response to changing requirements, you must create a new preauthenticated request.
URL: https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/managingbuckets.htm You can change a bucket's access from public to private or from private to public. Changing the type of access doesn't affect existing pre-authenticated requests. Existing pre-authenticated requests still work.
質問 103
Which two are true for achieving High Availability on Oracle Cloud Infrastructure? (Choose two.)
- A. Store your database files on Object Storage so that they are available in all Availability Domains in all regions.
- B. Distribute your application servers across all Availability Domains within a region.
- C. Configure your database to have Data Guard in another Availability Domain in Sync mode within a region.
- D. Store your database across multiple regions so that half of the data resides in one region and the other half resides in another region.
- E. Attach your block volume form Availability Domain 1 to a compute instance in Availability Domain 2 (and vice versa) so that they are highly available.
正解: B,C
質問 104
You are a network architect and have designed the network infrastructure of a three-tier application on Oracle Cloud Infrastructure (OCI). In the architecture, back-end DB servers are in a private subnet. One of your DB administrators requests to have access to OCI object storage service.
How can you meet this requirement?
- A. Attach a public IP address to the instances in the private subnet, and then add a new route rule to the private subnet route table to route default traffic to the internet gateway
- B. Create a dynamic routing gateway (DRG) and attach it your virtual cloud network (VCN). Add a default route rule to the private subnets route table and set the target as DRG
- C. Create a service gateway, add a new route rule to the private subnet route table that uses storage as your service gateway target type
- D. Add a new route rule to the private subnet route table to route default traffic to the internet gateway
正解: C
解説:
Explanation
A service gateway lets resources in your VCN privately access specific Oracle services, without exposing the data to an internet gateway or NAT. The resources in the VCN can be in a private subnet and use only private IP addresses. The traffic from the VCN to the service of interest travels over the Oracle network fabric and never traverses the internet.
To give your VCN access to a given service CIDR label, you must enable that service CIDR label for the VCN's service gateway. You can do that when you create the service gateway, or later after it's created. You can also disable a service CIDR label for the service gateway at any time.
For traffic to be routed from a subnet in your VCN to a service gateway, you must add a rule accordingly to the subnet's route table. The rule must use the service gateway as the target.
質問 105
Which two choices are true for Autonomous Data Warehouse (ADW)? (Choose two.)
- A. Billing stops for both CPU usage and storage usage when ADW is stopped
- B. Billing stops only when the ADW is terminated
- C. Billing for compute stops when ADW is stopped
- D. Billing for storage continues when ADW is stopped
正解: C,D
解説:
When Autonomous Databas instance is stopped,
CPU billing is halted based on full-hour cycles of usage
Billing for storage continues as long as the service instance exists.
and When Autonomous Database instance is started, the CPU billing is initiated
質問 106
Which two statements are true about the Oracle Cloud Infrastructure Object Storage Service? (Choose two.)
- A. Data is stored redundantly only in a single AD.
- B. It can be directly attached or detached from a compute instance.
- C. It provides strong consistency.
- D. It provides higher IOPS than Block Storage.
- E. Data is stored redundantly across multiple availability domains (ADs).
正解: C,E
解説:
Explanation
STRONG CONSISTENCYWhen a read request is made, Object Storage always serves the most recent copy of the data that was written to the system.DURABILITYObject Storage is a regional service. Data is stored redundantly across multiple storage servers. Object Storage actively monitors data integrity using checksums and automatically detects and repairs corrupt data. Object Storage actively monitors and ensures data redundancy. If a redundancy loss is detected, Object Storage automatically creates more data copies. For more details about Object Storage durability, see the Oracle Cloud Infrastructure Object Storage FAQ.CUSTOM METADATAYou can define your own extensive metadata as key-value pairs for any purpose. For example, you can create descriptive tags for objects, retrieve those tags, and sort through the data. You can assign custom metadata to objects and buckets using the Oracle Cloud Infrastructure CLI or SDK. See Software Development Kits and Command Line Interface for details.ENCRYPTIONObject Storage employs 256-bit Advanced Encryption Standard (AES-256) to encrypt object data on the server. Each object is encrypted with its own key. Data encryption keys are encrypted with a master encryption key that is frequently rotated.
Encryption is enabled by default and cannot be turned off.
質問 107
Which tool can automatically install Oracle Cloud Infrastructure CLI?
- A. APT
- B. Python
- C. PIP
- D. RPM
正解: C
解説:
Explanation
References:
https://docs.cloud.oracle.com/iaas/Content/API/SDKDocs/climanualinst.htm
質問 108
Which statement is true about DB Systems?
- A. You cannot manage the database as sys/sysdba.
- B. Data Guard as a Service is offered between regions.
- C. You can manage Oracle database initialization parameters at a global level.
- D. You have full control over the automatic backup schedule and retention periods.
正解: A,D
質問 109
You are the Cloud Architect of a company, and are designing a solution on Oracle Cloud Infrastructure where you want to have all your compute instances resistant to hardware failure.
Which two are recommended best practices to achieve the requirement on Oracle Cloud Infrastructure?
(Choose two.)
- A. Attach block volumes from different Availability Domains to compute instances in different Availability Domains for high availability.
- B. Create backups of your block volumes that are associated with compute instances in different regions.
- C. Create a custom image of your system drive each time you change the image.
- D. Design your system with redundant compute modes in different Availability Domains to support the failover capability.
正解: C,D
解説:
Explanation
References: https://docs.cloud.oracle.com/iaas/Content/Compute/References/bestpracticescompute.htm
System ResilienceOracle Cloud Infrastructure runs on Oracle's high-quality Sun servers. However, any hardware can experience a failure. Follow industry-wide hardware failure best practices to ensure the resilience of your solution. Some best practices include:
Design your system with redundant compute nodes in different availability domains to support fail-over capability.Create a custom image of your system drive each time you change the image.Back up your data drives, or sync to spare drives, regularly.If you experience a hardware failure and have followed these practices, you can terminate the failed instance, launch your custom image to create a new instance, and then apply the backup data.
質問 110
Which two statements are true about Oracle Cloud Infrastructure storage services? (Choose two.)
- A. You can move Object Storage buckets, Block Volumes and File Storage mount targets between compartments.
- B. Block Volume service scales to Exabytes per instance, while File Storage service offers unlimited scalability.
- C. You can take incremental snapshots of Block Volumes, File Storage file systems and Object Storage buckets.
- D. File storage mount target does not provide a private IP address, while the Object Storage bucket provides one.
- E. File Storage uses the network file system (NFS) protocol, whereas Block Volume uses iSCSI.
正解: A,E
質問 111
Your application consists of three Oracle Cloud Infrastructure compute instances running behind a public load balancer. You have configured the load balancer to perform health checks on these instances, but one of the three instances fails to pass the configured health check. Which of the following action will the load balancer perform?
- A. Remove the instance that failed the health check from the backend set
- B. Terminate the instance that failed health check
- C. Stop sending traffic to the instance that failed health check
- D. Stop the instances that failed health check
正解: C
解説:
Explanation
health check A test to confirm the availability of backend servers. A health check can be a request or a connection attempt. Based on a time interval you specify, the load balancer applies the health check policy to continuously monitor backend servers. If a server fails the health check, the load balancer takes the server temporarily out of rotation. If the server subsequently passes the health check, the load balancer returns it to the rotation.
You configure your health check policy when you create a backend set. You can configure TCP-level or HTTP-level health checks for your backend servers.
- TCP-level health checks attempt to make a TCP connection with the backend servers and validate the response based on the connection status.
- HTTP-level health checks send requests to the backend servers at a specific URI and validate the response based on the status code or entity data (body) returned.
The service provides application-specific health check capabilities to help you increase availability and reduce your application maintenance window.
質問 112
You are responsible for creating and maintaining an enterprise application that consists of multiple storage volumes across multiple compute instances in Oracle Cloud Infrastructure (OCI).
The storage volumes include boot volumes and block volumes for your data storage. You need to create backups of these storage volumes in the most time-efficient manner.
How can you meet this requirement?
- A. Create clones of all boot volumes and block volumes one at a time.
- B. Group together multiple storage volumes in a volume group and create volume group backups.
- C. Create on-demand full backups of block volumes, and create custom images from the boot volumes.
- D. Create on-demand full backups of boot volumes, and copy data in block volumes to Object Storage using OCI CLI.
正解: B
解説:
Reference:
https://docs.cloud.oracle.com/en-us/iaas/Content/Block/Concepts/volumegroups.htm
質問 113
Which two resources are availability domain constructs? (Choose two.)
- A. Compute Instance
- B. Object Storage
- C. Groups
- D. Block Volume
- E. VCN
正解: A,D
解説:
Explanation
References: https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm#one
質問 114
You deployed an Oracle Cloud Infrastructure (OCI) compute instance (VM.Standard2.16) to run a SQL database. After a few weeks, you need to increase disk performance by using NVMe disks but keeping the same number of CPUs. As a first step, you terminate the instance and preserve the boot volume.
What is the next step?
- A. Create a new instance using a VM.DenseIO2.16 shape using the preserved boot volume and move the SQL Database data to NVMe disks.
- B. Create a new instance using a VM.Standard1.16 shape using the preserved boot volume and move the SQL Database data to NVMe disks.
- C. Create a new instance using a VM.DenseIO2.16 shape using the preserved boot volume and move the SQL Database data to block volume.
- D. Create a new instance using a VM.DenseIO2.8 shape using the preserved boot volume and move the SQL Database data to NVMe disks.
正解: A
解説:
Explanation/Reference: https://docs.cloud.oracle.com/en-us/iaas/Content/Compute/References/computeshapes.htm
質問 115
Which two statements are true regarding cloning a block volume?
- A. You can skip block volume encryption when creating a clone
- B. You can change the block volume performance when creating a clone
- C. You can clone block volumes across regions
- D. You can change the block volume size when creating a clone
正解: B,D
解説:
You can create a clone from a volume using the Block Volume service. Cloning enables you to make a copy of an existing block volume without needing to go through the backup and restore process.
A cloned volume is a point-in-time direct disk-to-disk deep copy of the source volume, so all the data that is in the source volume when the clone is created is copied to the clone volume.
You can only create a clone for a volume within the same region, availability domain and tenant. You can create a clone for a volume between compartments as long as you have the required access permissions for the operation.
during create a clone you can do the following
If you want to clone the block volume to a larger size volume, check Custom Block Volume Size (GB) and then specify the new size. You can only increase the size of the volume, you cannot decrease the size. If you clone the block volume to a larger size volume, you need to extend the volume's partition. See Extending the Partition for a Block Volume for more information.
If you want to change the elastic performance setting when cloning the volume, check Custom Block Volume Performance and select the elastic performance setting you want the volume clone to use. See Block Volume Elastic Performance for more information. You can also change the elastic performance setting after you have cloned the volume, see Block Volume Elastic Performance. If you leave Custom Block Volume Performance unchecked, the cloned volume will use the same elastic performance setting as the source volume.
質問 116
Which statement is NOT true about the Oracle Cloud Infrastructure Object Storage service?
- A. Object storage resources can be shared across tenancies.
- B. Object versioning is enabled at namespace level.
- C. Immutable option for data stored in the Object Storage can be set via retention rules.
- D. Object lifecycle rules can be used to either archive or delete objects.
正解: C
解説:
Explanation/Reference: https://docs.cloud.oracle.com/en-us/iaas/Content/Object/Tasks/usingversioning.htm
質問 117
You are deploying a highly available web application In Oracle Cloud Infrastructure and have decided to use a public load balancer. The back-end web servers will be distributed across all three availability domains (ADs).
How many subnets should you create to deliver a secure, highly available application?
- A. one subnet in total; one regional private subnet to host your back-end web servers and your public load balancer.
- B. two subnets in total; one regional public subnet to host your back-end web servers and one regional private subnet to host your public load load balancer.
- C. two subnets in total; one regional private subnet to host your back-end web servers and one regional public subnet to host your public load load balancer.
- D. three subnets in total; one regional public subnet to host your back-end web servers and two AD specific private subnets to host your private load load balancer.
正解: C
解説:
Explanation
To accept traffic from the internet, you create a public load balancer. The service assigns it a public IP address that serves as the entry point for incoming traffic. You can associate the public IP address with a friendly DNS name through any DNS vendor.
A public load balancer is regional in scope. If your region includes multiple availability domains, a public load balancer requires either a regional subnet (recommended) or two availability domain-specific (AD-specific) subnets, each in a separate availability domain. With a regional subnet, the Load Balancing service creates a primary load balancer and a standby load balancer, each in a different availability domain, to ensure accessibility even during an availability domain outage. If you create a load balancer in two AD-specific subnets, one subnet hosts the primary load balancer and the other hosts a standby load balancer. If the primary load balancer fails, the public IP address switches to the secondary load balancer. The service treats the two load balancers as equivalent and you cannot specify which one is "primary".
Whether you use regional or AD-specific subnets, each load balancer requires one private IP address from its host subnet. The Load Balancing service supplies a floating public IP address to the primary load balancer.
The floating public IP address does not come from your backend subnets.
You cannot specify a private subnet
The backend servers (Compute instances) associated with a backend set can exist anywhere, as long as the associated network security groups (NSGs), security lists, and route tables allow the intended traffic flow.
Oracle recommends that you create your load balancer in a regional subnet.
Oracle recommends that you distribute your backend servers across all availability domains within the region.
質問 118
You are a system administrator of your company and you are asked to manage updates and patches across all your compute instances running Oracle Linux in Oracle Cloud Infrastructure (OCI). As part of your task, you need to apply all the latest kernel security updates to all instances.
Which OCI service will allow you to complete this task?
- A. Resource Manager
- B. OS Management
- C. Streaming
- D. Storage Gateway
- E. Registry
正解: B
解説:
Reference:
https://blogs.oracle.com/cloud-infrastructure/os-management-with-oracle-cloud-infrastructure
質問 119
Which two statements are true about Oracle Cloud Infrastructure (OCI) DB Systems Data Guard service?
- A. Data guard configuration on the OCI is limited to a virtual machine only
- B. Data guard implementation requires two DB Systems, one running the primary database on a virtual machine and the standby database running on bare metal.
- C. Both DB systems must use the same VCN, and port 1521 must be open
- D. Data guard implementation for Bare Metal shapes requires two DB Systems, one containing the primary database and one containing the standby database.
正解: C,D
解説:
An Oracle Data Guard implementation requires two DB systems, one containing the primary database and one containing the standby database. When you enable Oracle Data Guard for a virtual machine DB system database, a new DB system with the standby database is created and associated with the primary database. For a bare metal DB system, the DB system with the database that you want to use as the standby must already exist before you enable Oracle Data Guard.
Requirement details are as follows:
- Both DB systems must be in the same compartment.
- The DB systems must be the same shape type (for example, if the shape of the primary database is a virtual machine, then the shape of the standby database can be any other virtual machine shape).
- If your primary and standby databases are in different regions, then you must peer the virtual cloud networks (VCNs) for each database.
- Configure the security list ingress and egress rules for the subnets of both DB systems in the Oracle Data Guard association to enable TCP traffic to move between the applicable ports. Ensure that the rules you create are stateful (the default).
質問 120
Which two statements about Oracle Cloud Infrastructure File Storage Service are accurate? (Choose two.)
- A. Customer can encrypt data in their file system using their own Vault encryption key.
- B. Customer can encrypt the communication to a mount target via export options.
- C. File systems use Oracle-managed keys by default.
- D. Mount targets use Oracle-managed keys by default.
- E. Communication with file systems in a mount target is encrypted via HTTPS.
正解: A,D
解説:
Explanation/Reference:
Reference: https://docs.cloud.oracle.com/en-us/iaas/Content/File/Concepts/filestorageoverview.htm
質問 121
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