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[Jul 24, 2024] DA0-001 PDF Questions and Testing Engine With 255 Questions [Q39-Q56]

[Jul 24, 2024] DA0-001 PDF Questions and Testing Engine With 255 Questions

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CompTIA DA0-001, also known as the CompTIA Data+ Certification Exam, is a widely recognized certification exam designed for individuals seeking expertise in data management and analytics. CompTIA Data+ Certification Exam certification serves as a testament to the individual’s knowledge and skills in the field of data management, and validates their ability to work with data effectively. The DA0-001 exam covers a range of topics, including data analysis, management, storage, and security.

CompTIA DA0-001 exam is a vendor-neutral certification, which means that it is not tied to any specific software or hardware platform. This makes it an ideal certification for professionals who work in a variety of industries and use different tools and technologies to manage and analyze data.

Q39. 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?

Five rows, eight columns

Seven rows, eight columns

Eight rows, seven columns

Nine rows, five columns

Q40. Which of the following is the correct data type for text?

Boolean

String

Integer

Float

Q41. Refer to the exhibit.
Given the diagram below:

Which of the following data schemas shown?

Key-value pairs

Online transactional processing

Data Lake

Relational database

Q42. Given the table below:

Which of the following boxes indicates that a Type Il error has occurred?

Q43. Which of the following is a common data analytics tool that is also used as an interpreted, high-level, general-purpose programming language?

SAS

Microsoft Power B1

IBM SPSS

Python

Q44. Given the following graph:

Which of the following summary statements upholds integrity in data reporting?

Sales are approximately equal for Product A and Product B across all strategies.

Strategy 4 provides the best sales in comparison to other strategies.

While Strategy 2 does not result in the highest sales of Product D, over all products it appears to be the most effective.

Product D should be promoted more than the other products in all strategies.

Q45. What cybersecurity goal protects an organization’s data from unauthorized modification?

Confidentiality.

Non-repudiation.

Integrity.

Availability.

Q46. 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?

7,038

9,600

10,600

10,800

Q47. 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.

Q48. Zip code,____________, and___________ uniquely identify 87% of people in the United States.

first name, last name

phone number, email address

date of birth, gender

gender, first name

Q49. The current date is July 14, 2020. A data analyst has been asked to create a report that shows the company’s year-over-year Q2 2020 sales. Which of the following reports should the analyst compare?

Q2 2020 and Q4 2019

YTD 2020 and YTD 2019

Q2 2020 and Q2 2019

Q2 2020 and Q2 2021

Q50. Which of the following are reasons to conduct data cleansing? (Select two).

To perform web scraping

To track KPls

To improve accuracy

To review data sets

To increase the sample size

To calculate trends

Q51. You are working with a dataset and need to swap the values in rows with those in columns.
What action do you need to perform?

Recording

Filtering.

Aggregation.

Transposition.

Q52. A sales director has requested a report for individual team members within the division be developed. The director would like the report to be shared with all team members, but individual team members should not be identifiable within the report Which of the following access requirements would support the director’s needs?

Create an acceptable use policy for the sales data.

Release the report as user-group-based access and include data masking.

Get a data use agreement from the individual team members.

Provide the report based on role and include data encryption.

Q53. A data analyst for a media company needs to determine the most popular movie genre. Given the table below:

Which of the following must be done to the Genre column before this task can be completed?

Append

Merge

Concatenate

Delimit

Q54. The senior management team at a company receives a detailed sales report at the end of each quarter. The report is several pages long and includes data from dozens of offices across the country. The team wants a better way to get a quick snapshot of what is included in the report. Which of the following modifications would best meet this requirement?

Modifying documentation elements to include reference data sources

Modifying the font size and style so important data points are more visible

Modifying the report to include a summary section with observations and insights

Modifying the report layout so it is easier to follow and understand

Q55. Which one of the following values would not be appropriately stored in integer data type?

-16

10921

1.2

Q56. Exhibit.

Which of the following logical statements results in Table B?

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[Jul 24, 2024] DA0-001 PDF Questions and Testing Engine With 255 Questions [Q39-Q56]