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NEW QUESTION 27
When taking the test at home, how much extra time is allowed compared to the in-person test?
- A. 15 minutes
- B. None.
- C. 30 minutes
- D. 10 minutes
Answer: B
NEW QUESTION 28
The sales grocery store had an average of $8000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether the advertising campaigns have been effective in increasing sales, a sample of 64 days of sales was selected, and the sample mean was $8000 per day.
The correct null and alternative hypotheses to test whether there has been a significant increase are
- A. Null Sample mean is $8000; Alternative Sample mean is greater than $8000.
- B. Null Population mean is $8000; Alternative; Population mean is greater than or equal to $8000.
- C. Null Sample mean is $8000; Alternative Sample mean is greater than or equal to $8000.
- D. Null Population mean is $8000; Alternative; Population mean is greater than $8000.
Answer: D
Explanation:
Since you are trying to determine whether sales increased above the current average of $8000, the population mean for the null hypothesis is $8000; whereas the mean for the alternative hypothesis is greater than $8000. Hypotheses are always stated in terms of population you are working with, ruling out options A and B.
The test is whether sales are higher than the average of $8000 per day, which rules out option C.
NEW QUESTION 29
Which of the following roles is responsible for ensuring an organization's data quality, security, privacy, and regulatory compliance?
- A. Data owner.
- B. Data processor.
- C. Data custodian.
- D. Data steward.
Answer: D
Explanation:
Correct answer B. Data steward.
A data steward is responsible for leading an organization's data governance activities, which include data quality, security, privacy, and regulatory compliance.
NEW QUESTION 30
A web developer wants to ensure that malicious users can't type SQL statements when they asked for input, like their username/userid.
Which of the following query optimization techniques would effectively prevent SQL Injection attacks?
- A. Indexing.
- B. Parametrization.
- C. Subset of records.
- D. Temporary table in the query set.
Answer: B
Explanation:
The correct answer is D: Parametrization. Parameterized SQL queries allow you to place parameters in an SQL query instead of a constant value. A parameter takes a value only when the query is executed, allowing the query to be reused with different values and purposes. Parameterized SQL statements are available in some analysis clients, and are also available through the Historian SDK.
For example, you could create the following conditional SQL query, which contains a parameter for the collector's name: SELECT* FROM ExamsDigest WHERE coursename=? ORDER BY tagname SQL Injection is best prevented through the use of parameterized queries.
NEW QUESTION 31
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