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NEW QUESTION: 1
솔루션 설계자는 영수증 이미지를 캡처하여 비용을 추적하는 모바일 응용 프로그램을 설계하고 있습니다. Architect는 Amazon S3에 이미지를 저장하려고 합니다. 그러나 웹 서버를 통해 이미지를 업로드하면 너무 많은 트래픽이 생성됩니다. Amazon S3에서 모바일 응용 프로그램의 이미지를 저장하는 가장 효율적인 방법은 무엇입니까?
A. 사전 서명 된 URL을 사용하여 S3에 직접 업로드
B. Spot Instances를 사용하여 웹 서버 함대를 확장하여 이미지를 처리할수 있는 리소스를 제공합니다.
C. 두 번째 버킷에 업로드하고 람다 이벤트로 이미지를 기본 버킷에 복사하도록합니다.
D. ELB Classic Load Balancer 뒤에있는 별도의 Auto Scaling 그룹에 업로드하고 Amazon S3 버킷에 쓰기
Answer: D

NEW QUESTION: 2
HOTSPOT
You evaluate the following code:

You need to determine the values of sampleStudent, sampleCourse.name, and sampleCourse.grade that are output by console.log().
What are the final values for the three variables? To answer, select the appropriate values in the answer area.

Answer:
Explanation:

Explanation:

References: https://www.w3schools.com/js/js_output.asp

NEW QUESTION: 3
Refer to the exhibit.

Python threading allows a developer to have different parts of a program run concurrently and simplify a design. Drag and drop the code snippets from the left onto the item numbers on the right that match the missing sections in the exhibit to create a thread instance.

Answer:
Explanation:

NEW QUESTION: 4
You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema.
Examine the following steps:
1. Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS ('SH', 'CUSTOMERS') FROM dual statement.
2. Execute the DBMS_STATS.SEED_COL_USAGE (null, 'SH', 500) procedure.
3. Execute the required queries on the CUSTOMERS table.
4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE ('SH', 'CUSTOMERS') FROM dual statement.
Identify the correct sequence of steps.
A. 4, 1, 3, 2
B. 3, 2, 1, 4
C. 3, 2, 4, 1
D. 2, 3, 4, 1
Answer: D
Explanation:
Explanation
Step 1 (2). Seed column usage
Oracle must observe a representative workload, in order to determine the appropriate column groups. Using the new procedure DBMS_STATS.SEED_COL_USAGE, you tell Oracle how long it should observe the workload.
Step 2: (3) You don't need to execute all of the queries in your work during this window. You can simply run explain plan for some of your longer running queries to ensure column group information is recorded for these queries.
Step 3. (1) Create the column groups
At this point you can get Oracle to automatically create the column groups for each of the tables based on the usage information captured during the monitoring window. You simply have to call the DBMS_STATS.CREATE_EXTENDED_STATS function for each table. This function requires just two arguments, the schema name and the table name. From then on, statistics will be maintained for each column group whenever statistics are gathered on the table.
Note:
* DBMS_STATS.REPORT_COL_USAGE reports column usage information and records all the SQL operations the database has processed for a given object.
* The Oracle SQL optimizer has always been ignorant of the implied relationships between data columns within the same table. While the optimizer has traditionally analyzed the distribution of values within a column, he does not collect value-based relationships between columns.
* Creating extended statisticsHere are the steps to create extended statistics for related table columns withdbms_stats.created_extended_stats:
1 - The first step is to create column histograms for the related columns.2 - Next, we run dbms_stats.create_extended_stats to relate the columns together.
Unlike a traditional procedure that is invoked via an execute ("exec") statement, Oracle extended statistics are created via a select statement.