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CompTIA DA0-001 exam is a multiple-choice exam that consists of 90 questions. DA0-001 exam duration is 90 minutes, and the passing score is 720 on a scale of 100-900. DA0-001 exam is available in English, Japanese, and Portuguese. DA0-001 Exam Fees vary by location, and candidates can register for the exam through the Pearson VUE website.
NEW QUESTION # 39
A user imports a data file into the accounts payable system each day. On a regular basis. the field input is not what the system is expecting. so it results in an error for the row and a broken import process. To resolve the issue, the user opens the file, finds the error in the row, and manually corrects it before attempting the import again. The import sometimes breaks on subsequent attempts. though. Which of the following changes should be made to this process to reduce the number of errors?
Answer: B
Explanation:
A data field to data type validator is a tool or a process that checks if the data in each field of a file matches the expected data type, such as text, number, date, etc. A data field to data type validator can help to identify and correct any errors or inconsistencies in the data before importing it into the accounts payable system. This would reduce the number of errors and broken imports, as well as save time and effort for the user.
NEW QUESTION # 40
Randy scored 76 on a math test, Katie scored 86 on a science test, Ralph scored 80 on a history test, and Jean scored 80 on an English test. The table below contains the mean and standard deviation of the scores for each of the courses:
Using this information, which of the following students had the BEST score?
Answer: D
Explanation:
To compare the students' scores, we need to standardize them by using the z-score formula, which is:
z = (x - #) / #
where x is the raw score, # is the mean, and # is the standard deviation. The z-score tells us how many standard deviations a score is above or below the mean. A higher z-score means a better score relative to the average.
Using the table, we can calculate the z-scores for each student as follows:
Randy: z = (76 - 70) / 2 = 3 Katie: z = (86 - 80) / 3 = 2 Ralph: z = (80 - 75) / 2 = 2.5 Jean: z = (80 - 90) / 1 =
-10
The student with the highest z-score is Randy, with a z-score of 3. This means that Randy scored 3 standard deviations above the mean in math, which is the best performance among the four students. Therefore, the correct answer is A.
References: Comparing with z-scores (video) | Z-scores | Khan Academy, 17 Important Data Visualization Techniques | HBS Online
NEW QUESTION # 41
An analyst wants to extract data from a variety of sources and store the data in a cloud-based environment prior to cleaning. Which of the following integration techniques should the analyst use?
Answer: B
NEW QUESTION # 42
A data analyst has been asked to organize the table below in the following ways:
By sales from high to low -
By state in alphabetic order -
Which of the following functions will allow the data analyst to organize the table in this manner?
Answer: D
Explanation:
Sorting is the function that will allow the data analyst to organize the table in the desired manner. Sorting means arranging the data in a specific order, such as ascending or descending, based on one or more criteria. Sorting can be applied to any column in the table, such as sales or state. Reference: CompTIA Data+ Certification Exam Objectives, page 11
NEW QUESTION # 43
Which one of the following is a common data warehouse schema?
Answer: B
Explanation:
Explanation
Snowflake enables data storage, processing, and analytic solutions that are faster, easier to use, and far more flexible than traditional offerings. The Snowflake data platform is not built on any existing database technology or "big data" software platforms such as Hadoop.
NEW QUESTION # 44
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