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NEW QUESTION: 1
セキュリティエンジニアは、ユーザーがキーに直接触れることなくAmazon S3オブジェクトをシームレスに暗号化できるソリューションを実装しています。ソリューションは、継続的な管理を必要とせずに高度にスケーラブルでなければなりません。さらに、組織は暗号化キーをすぐに削除できる必要があります。
これらの要件を満たすソリューションはどれですか?
A. AWS KMSとAWS管理キー、およびScheduleKeyDeletion APIとPendingWindowInDaysを0に設定して、必要に応じてキーを削除します。
B. インポートされたAWSマテリアルでKMSを使用し、必要に応じてDeletelmportedKeyMaterial APIを使用してキーマテリアルを削除します。
C. AWS CloudHSMを使用してキーを保存し、必要に応じてCloudHSM APIまたはPKCS11ライブラリを使用してキーを削除します。
D. Systems Managerパラメーターストアを使用してキーを保存し、必要に応じてサービスAPI操作を使用してキーを削除します。
Answer: C
Explanation:
https://docs.aws.amazon.com/kms/latest/developerguide/importing-keys-delete-key-material.html
NEW QUESTION: 2
Which of the following statements is TRUE when a table is created?
A. No space is allocated by the system until a record is inserted into the table
B. One extent of storage space is allocated on each dataslice for the table
C. 3MB of temporary space is allocated on each dataslice for the table
D. One page of storage space is allocated on each dataslice for the table
Answer: D
NEW QUESTION: 3
You are developing an application that includes a class named Warehouse. The Warehouse class includes a static property named Inventory- The Warehouse class is defined by the following code segment. (Line numbers are included for reference only.)
You have the following requirements:
* Initialize the _inventory field to an Inventory instance.
* Initialize the _inventory field only once.
* Ensure that the application code acquires a lock only when the _inventory object must be instantiated.
You need to meet the requirements.
Which three code segments should you insert in sequence at line 09? (To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.)
Answer:
Explanation:
1 - if (_inventory == null)
2 - lock (_lock)
3 - if (_inventory == null) _inventory = new Inventory ( ) ;
Explanation:
After taking a lock you must check once again the _inventory field to be sure that other threads didn't instantiated it in the meantime.
First, you check if the inventory is null, if so, you lock it to avoid other threads to change it.
Second, you check again for the null, as in the tiny millisecond between check for null and locking could another thread get it.
Finally you create the instance and release the lock.