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  3. DA0-001 Exam
  4. CompTIA.DA0-001.v2022-08-24.q50 Dumps
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Question 46

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?

Correct Answer: D
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.
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Question 47

What is the maximum number of values that may be assigned to a single key in a key/value store?

Correct Answer: C
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Question 48

Jenny wants to study the academic performance of undergraduate sophomores and wants to determine the average grade point average at different points during an academic year.
What best describes the data set she needs?

Correct Answer: A
Correct answer A. Sample.
Jenny does not have data for the entire population of all undergraduate sophomores. While a specific grade point average is an observation of variable, jenny needs sample data.
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Question 49

Which of the following should be accomplished NEXT after understanding a business requirement for a data analysis report?

Correct Answer: D
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Question 50

Most data that exists in the world is structured data.

Correct Answer: A
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