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NEW QUESTION: 1
Examine the Exhibit and view the structure of an indexes for the EMPLOYEES table.

Which two actions might improve the performance of the query?
A. Use the ALL_ROWS hint in the query.
B. Set the OPTIMIZER_MODE parameter to ALL_ROWS.
C. Collect the histogram statistics for the EMPLOYEE_ID column.
D. Decrease the value for the DB_FILE_MULTIBLOCK_READ_COUNT initialization parameter.
E. Decrease the index on the EMPLOYEE_ID if not being used.
Answer: A,B
Explanation:
A:The ALL_ROWS hint instructs the optimizer to optimize a statement block with a goal of best throughput, which is minimum total resource consumption.
E:optimizer_mode=all_rows - This optimizer mode favors full-table scans (especially parallel full-table-scans) in cases where the server resources will be minimized. The all_rows mode is generally used during batch-oriented processing and for data warehouses where the goal is to minimize server resource consumption.

NEW QUESTION: 2
Which of the following equations can be used to calculate shrinkage in a mens shirts store?
A. No. of shirts in stock-No. of shirts sold
B. No. of defective shirts in stock-No. of shirts in system inventory
C. No. of shirts in stock-No. of shirts arriving in store
D. No. of shirts in stock-No. of shirts in system inventory
Answer: D

NEW QUESTION: 3
개발자는 AWS Lambda 함수를 생성하여 Amazon Kinesis Data Stream에서 데이터 스트림을 처리합니다. 람다 함수가 데이터를 구문 분석하고 누락된 필드를 발견하면 오류가있는 함수를 종료합니다. 이 함수는 Kinesis 스트림에서 중복 레코드를 생성 중입니다. 개발자가 람다 함수없이 스트림 출력을 보면 중복 레코드가 없습니다.
복제물의 이유는 무엇입니까?
A. 람다 함수가 스트림에서 오는 데이터의 양을 따라 잡지 못하고있다.
B. 람다 함수가 오류를 처리하지 못했으며 람다 서비스가 데이터를 다시 처리하려고 했습니다.
C. 람다 이벤트 소스가 비동기 호출을 사용하여 중복 레코드가 발생했습니다.
D. 람다 함수는 오류가 발생한 후 Kinesis 스트림 포인터를 다음 레코드로 넘깁니다.
Answer: D