DA0-001 PDF Dumps Feb 27, 2025 Exam Questions – Valid DA0-001 Dumps [Q36-Q53]

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DA0-001 PDF Dumps Feb 27, 2025 Exam Questions – Valid DA0-001 Dumps

Ultimate DA0-001 Guide to Prepare Free Latest CompTIA Practice Tests Dumps

CompTIA DA0-001 certification exam, also known as the CompTIA Data+ certification, is a vendor-neutral certification that validates the skills and knowledge of professionals working with data. DA0-001 exam is designed to test the candidate’s understanding of data management, data analysis, and data reporting. CompTIA Data+ Certification Exam certification is ideal for professionals who work with data in various industries, including finance, healthcare, manufacturing, and technology.

Q36. Daniel is using the structured Query language to work with data stored in relational database.
He would like to add several new rows to a database table.
What command should he use?

SELECT.

ALTER.

INSERT.

UPDATE.

Q37. A collections manager has a team calling customers who are past due on their accounts in an attempt to collect payments. The manager receives the call list in the form of a printed report that is generated by the accounting department at the beginning of each week. Consequently, the collections team calls some customers who have made payments in the time since the report was last printed. Which of the following reporting enhancements could the accounting department implement to best reduce the number of calls on current accounts?

Modify the date range on the report

Include a time stamp on the report.

Increase the frequency of report generation.

Add a report run date to the report.

Q38. A data analyst needs to perform a full outer join of a customer’s orders using the tables below:

Which of the following is the mean of the order quantity?

73.5

76.5

78.8

81.5

Q39. An analyst reviews the following data:
7
3
5
2
3
7
7
10
Which of the following is the value of the mode?

Q40. A data analyst has been asked to merge the tables below, first performing an INNER JOIN and then a LEFT JOIN:

Customer Table –
In-store Transactions –

Which of the following describes the number of rows of data that can be expected after performing both joins in the order stated, considering the customer table as the main table?

INNER: 6 rows; LEFT: 9 rows

INNER: 9 rows; LEFT: 6 rows

INNER: 9 rows; LEFT: 15 rows

INNER: 15 rows; LEFT: 9 rows

Explanation
An INNER JOIN returns only the rows that match the join condition in both tables. A LEFT JOIN returns all the rows from the left table, and the matched rows from the right table, or NULL if there is no match. In this case, the customer table is the left table and the in-store transactions table is the right table. The join condition is based on the customer_id column, which is common in both tables.
To perform an INNER JOIN, we can use the following SQL query:
SELECT * FROM customer INNER JOIN in_store_transactions ON customer.customer_id = in_store_transactions.customer_id; This query will return 9 rows of data, as shown below:
customer_id | name | lastname | gender | marital_status | transaction_id | amount | date 1 | MARC | TESCO | M
| Y | 1 | 1000 | 2020-01-01 1 | MARC | TESCO | M | Y | 2 | 5000 | 2020-01-02 2 | ANNA | MARTIN | F | N | 3 |
2000 | 2020-01-03 2 | ANNA | MARTIN | F | N | 4 | 3000 | 2020-01-04 3 | EMMA | JOHNSON | F | Y | 5 |
4000 | 2020-01-05 4 | DARIO | PENTAL | M | N | 6 | 5000 | 2020-01-06 5 | ELENA | SIMSON| F| N|7|6000|2020-01-07 6|TIM|ROBITH|M|N|8|7000|2020-01-08 7|MILA|MORRIS|F|N|9|8000|2020-01-09 To perform a LEFT JOIN, we can use the following SQL query:
SELECT * FROM customer LEFT JOIN in_store_transactions ON customer.customer_id = in_store_transactions.customer_id; This query will return 15 rows of data, as shown below:
customer_id|name|lastname|gender|marital_status|transaction_id|amount|date
1|MARC|TESCO|M|Y|1|1000|2020-01-01 1|MARC|TESCO|M|Y|2|5000|2020-01-02
2|ANNA|MARTIN|F|N|3|2000|2020-01-03 2|ANNA|MARTIN|F|N|4|3000|2020-01-04
3|EMMA|JOHNSON|F|Y|5|4000|2020-01-05 4|DARIO|PENTAL|M|N|6|5000|2020-01-06
5|ELENA|SIMSON||F||N||7||6000||2020-01-07 6||TIM||ROBITH||M||N||8||7000||2020-01-08
7||MILA||MORRIS||F||N||9||8000||2020-01-09 8||JENNY||DWARTH||F||Y||NULL||NULL||NULL As you can see, the customers who do not have any transactions (customer_id = 8) are still included in the result, but with NULL values for the transaction_id, amount, and date columns.
Therefore, the correct answer is C: INNER: 9 rows; LEFT: 15 rows.

Q41. A cereal manufacturer wants to determine whether the sugar content of its cereal has increased over the years. Which of the following is the appropriate descriptive statistic to use?

Frequency

Percent change

Variance

Mean

Q42. The director of operations at a power company needs data to help identify where company resources should be allocated in order to monitor activity for outages and restoration of power in the entire state. Specifically, the director wants to see the following:
* County outages
* Status
* Overall trend of outages
INSTRUCTIONS:
Please, select each visualization to fit the appropriate space on the dashboard and choose an appropriate color scheme. Once you have selected all visualizations, please, select the appropriate titles and labels, if applicable. Titles and labels may be used more than once.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

Power outages

Power

Q43. An e-commerce company recently tested a new website layout. The website was tested by a test group of customers, and an old website was presented to a control group. The table below shows the percentage of users in each group who made purchases on the websites:

Which of the following conclusions is accurate at a 95% confidence interval?

In Germany, the increase in conversion from the new layout was not significant.

In France, the increase in conversion from the new layout was not significant.

In general, users who visit the new website are more likely to make a purchase.

The new layout has the lowest conversion rates in the United Kingdom.

Q44. A data analyst has been asked to derive a new variable labeled “Promotion_flag” based on the total quantity sold by each salesperson. Given the table below:

Which of the following functions would the analyst consider appropriate to flag “Yes” for every salesperson who has a number above 1,000,000 in the Quantity_sold column?

Date

Mathematical

Logical

Aggregate

Q45. Which of the following techniques is used to quantify data?

Decoding

Enumeration

Coding

Structure

Q46. 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?

The data analyst is not querying the databases correctly.

The databases are recording different events.

The databases are recording the event in different time zones.

The second database is logging incorrectly.

Q47. Exhibit.

Which of the following logical statements results in Table B?

Q48. An analyst has been tracking company intranet usage and has been asked to create a chat to show the most- used/most-clicked portions of a homepage that contains more than 30 links. Which of the following visualizations would BEST illustrate this information?

Scatter plot

Heat map

Pie chart

Infographic

Q49. Which of the following best describes the process of examining data for statistics and information about the data?
Cleansing

Profiling

Governance

Q50. Which of the following descriptive statistical methods are measures of central tendency? (Choose two.)

Mean

Minimum

Mode

Variance

Correlation

Maximum

Q51. An analyst modified a data set that had a number of issues. Given the original and modified versions:

Which of the following data manipulation techniques did the analyst use?

Imputation

Recoding

Parsing

Deriving

Q52. Which of the following best describes a business analytics tool with interactive visualization and business capabilities and an interface that is simple enough for end users to create their own reports and dashboards?

Python

Microsoft Power Bl

SAS

Q53. The duration of a phone call in milliseconds is an example of:

ordinal data.

nominal data.

boolean data.

continuous data.