Pass DA0-001 Exam - Real Test Engine PDF with 135 Questions
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NEW QUESTION # 17
Analyze the values of X shown below
(2,2,5,6,7)
What is the modal value?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 18
An analyst runs a report on a daily basis, and the number of datapoints must be validated before the data can be analyzed. The number of datapoints increases each day by approximately 20% of the total number from the day before. On a given day, the number of datapoints was 8,798. Which of the following should be the total number of datapoints on the next day?
- A. 7,038
- B. 9,600
- C. 10,600
- D. 10,800
Answer: A
NEW QUESTION # 19
Given the following customer and order tables:
Which of the following describes the number of rows and columns of data that would be present after performing an INNER JOIN of the tables?
- A. Five rows, eight columns
- B. Seven rows, eight columns
- C. Nine rows, five columns
- D. Eight rows, seven columns
Answer: C
NEW QUESTION # 20
A data analyst has been asked to create an ad-hoc sales report for the Chief Executive Officer (CEO).
Which of the following should be included in the report?
- A. The sales representatives' home addresses.
- B. Line-item SKU numbers.
- C. The customers' first and last names.
- D. YTD total sales.
Answer: D
NEW QUESTION # 21
Given the following report:
Which of the following components need to be added to ensure the report is point-in-time and static? (Choose two.)
- A. A summary of the KPIs
- B. The date when the report was last accessed
- C. The time period the report covers
- D. The date on which the report was run
- E. A control group for the phrases
- F. Filter buttons for the status
Answer: C,F
NEW QUESTION # 22
Which of the following variable name formats would be problematic if used in the majority of data software programs?
- A. First Name
- B. First_Name
- C. First_Name_
- D. FirstName
Answer: A
NEW QUESTION # 23
You are measuring how much a child has grown over the past year and would like to express that using a percentage.
What calculation is most appropriate?
- A. Percent variance.
- B. Percent deviation.
- C. Percent difference.
- D. Percent change.
Answer: D
NEW QUESTION # 24
What internal document explains privacy responsibilities to employees who will handle personally identifiable information?
- A. Security policy
- B. Privacy policy
- C. Integrity policy
- D. Acceptable use policy
Answer: D
NEW QUESTION # 25
The ACME Corporation hired an analyst to detect data quality issues in their excel documents. Which of the following are the most common issues? (Select TWO)
- A. Misspellings.
- B. Symbols.
- C. Duplicates.
- D. Commas.
- E. Apostrophe.
Answer: A,C
Explanation:
1. Duplicates
2. Misspellings
The most common data quality issues are difficult to resolve in Excel because of their rigidity. It forces analysts to do a ton of manual work, which results in a high probability of an error being introduced to the data set. Those common issues include:
- Blanks
- Nulls
- Outliers
- Duplicates
- Extra spaces
- Misspellings
- Abbreviations and domain-specific variations
- Formula error codes
When introduced, these errors can skew or even invalidate the resulting analysis. A smart tool would minimize the possibility of error by automating the manual work. In Excel, you might look for data quality issues in one of two ways. First, you might use auto filters on specific columns to scan for anomalies and blanks or you might use a pivot table to find gaps and discrepancies.
In either case, you're scanning for the anomalies yourself. Suffice it to say that's not a very efficient process. It also means accuracy is only as good as the analyst's eye, so the probability of error varies throughout the day.
NEW QUESTION # 26
Which of the following actions should be taken when transmitting data to mitigate the chance of a data leak occurring? (Choose two.)
- A. Data processing
- B. Data encryption
- C. Data reporting
- D. Fata removal
- E. Data masking
- F. Data identification
Answer: B,E
NEW QUESTION # 27
An analyst needs to provide a chart to identify the composition between the categories of the survey response data set:
Which of the following charts would be BEST to use?
- A. Line
- B. Scatter pot
- C. Histogram
- D. Pie
- E. Waterfall
Answer: D
NEW QUESTION # 28
Which of the following is a common data analytics tool that is also used as an interpreted, high-level, general-purpose programming language?
- A. Python
- B. IBM SPSS
- C. SAS
- D. Microsoft Power B1
Answer: A
NEW QUESTION # 29
You are looking at a dashboard is sales by a US state and would like to see the sales for individual counties within a specific state What action should you take?
- A. Deviate.
- B. Roll up.
- C. Aggregate.
- D. Drill down.
Answer: D
NEW QUESTION # 30
What technique can you use to predict one value from another using a linear relationship?
- A. Chi-square.
- B. Hypothesis testing.
- C. Correlation.
- D. Regression.
Answer: D
NEW QUESTION # 31
Which of the following is a common data analytics tool that is also used as an interpreted, high-level, general-purpose programming language?
- A. Python
- B. Microsoft Power BI
- C. IBM SPSS
- D. SAS
Answer: A
NEW QUESTION # 32
James wants to analyze profit based on sales of five different product categories.
His source data set consists of 5.8 million rows with columns including region, product category, product name, and sales price.
How should he manipulate the data to facilitate his analysis?
Choose the best answer.
- A. Transpose by product name and summarize.
- B. Transpose by product category and summarize.
- C. Transpose by region and summarize.
- D. Transpose by sales price and summarize.
Answer: B
Explanation:
Correct answer B. Transpose by product category and summarize.
We can transpose this data by product category to perform this analysis broken out by product category.
Transposing by sales price, region, or product name will not further his state analytical goal.
NEW QUESTION # 33
A recurring event is being stored in two databases that are housed in different geographical locations. A data analyst notices the event is being logged three hours earlier in one database than in the other database. Which of the following is the MOST likely cause of the issue?
- A. The databases are recording the event in different time zones.
- B. The data analyst is not querying the databases correctly.
- C. The databases are recording different events.
- D. The second database is logging incorrectly.
Answer: A
NEW QUESTION # 34
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