TEST DA0-001 DURATION | BRAINDUMPS DA0-001 DOWNLOADS

Test DA0-001 Duration | Braindumps DA0-001 Downloads

Test DA0-001 Duration | Braindumps DA0-001 Downloads

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CompTIA Data+ Certification Exam Sample Questions (Q132-Q137):

NEW QUESTION # 132
A military commander would like to see the health scorecards of the troops daily and filter them based on gender and rank. Considering this data is PHI, which of the following would be the best way for the commander to view the information?

  • A. A daily printout of a report
  • B. A cloud-hosted spreadsheet
  • C. A password-protected dashboard
  • D. An emailed report

Answer: C

Explanation:
Explanation
A password-protected dashboard is a type of web-based application that can display the health scorecards of the troops in a secure and interactive way. A password-protected dashboard can provide the following benefits for the commander:
It can protect the PHI data from unauthorized access or disclosure by requiring a valid username and password to log in. This can ensure that only the commander and other authorized personnel can view the information12 It can allow the commander to filter the data based on gender and rank by using drop-down menus, sliders, checkboxes, or other controls. This can enable the commander to customize the view and focus on the relevant data13 It can update the data daily by connecting to a data source that refreshes automatically or on demand. This can ensure that the commander always sees the latest and most accurate information14 It can present the data in a visual and intuitive way by using charts, graphs, tables, or other elements. This can help the commander to understand and analyze the data more easily and effectively1


NEW QUESTION # 133
Which of the following is the most likely reason for a data analyst to optimize a query using parameterization?

  • A. To return a subset of records
  • B. To insert a temporary table
  • C. To increase the query speed
  • D. To prevent SQL injections

Answer: D

Explanation:
Parameterization in SQL queries is a technique used to prevent SQL injection, which is a common security vulnerability that allows an attacker to interfere with the queries that an application makes to its database. By using parameterized queries, the database can distinguish between code and data, regardless of the input received. This method ensures that an attacker cannot change the intent of a query, even if SQL commands are inserted by the attacker. While parameterization can also affect performance by enabling consistent query execution plans, its primary purpose is to enhance security.
References:
* Medium article on SQL Query Optimization1.
* MSSQLTips on SQL Query Performance2.
* Blog post on SQL Performance Optimization3.
* SQL Easy guide on improving SQL Query Performance4.
* LearnSQL.com on SQL for Data Analysis5.


NEW QUESTION # 134
Given the image below:

Which of the following file formats is depicted?

  • A. HTML
  • B. JSON
  • C. CSV
  • D. XML

Answer: B

Explanation:
The image depicts a snippet of code in the JSON format, which stands for JavaScript Object Notation. JSON is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language and is commonly used to transmit data in web applications.
* CSV, or Comma-Separated Values, is a simple file format used to store tabular data, such as a spreadsheet or database. It uses commas to separate values.
* XML, or eXtensible Markup Language, is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
* HTML, or HyperText Markup Language, is the standard markup language for documents designed to be displayed in a web browser.
References:
* JSON.org - Introducing JSON1
* W3Schools - JSON Introduction2
* Mozilla Developer Network - JSON3


NEW QUESTION # 135
How should data classifications be assigned?

  • A. According to criticality.
  • B. According to sensitivity.
  • C. According to sensitivity and criticality.
  • D. According to sensitivity, criticality and age.

Answer: C


NEW QUESTION # 136
Which of the following is a non-parametric test?

  • A. Correlation coefficient
  • B. One-sample t-test
  • C. Spearman's rank correlation
  • D. Two-way ANOVA

Answer: C

Explanation:
Explanation
The correct answer is D. Spearman's rank correlation.
Spearman's rank correlation is a non-parametric test that measures the strength and direction of the relationship between two variables that are ranked (ordinal) or continuous. Spearman's rank correlation does not assume that the data follows a normal distribution or that the variables are linearly related. Spearman's rank correlation is based on the ranks of the data rather than the actual values12 A; One-sample t-test is not correct, because it is a parametric test that compares the mean of a sample to a specified value. One-sample t-test assumes that the data follows a normal distribution and has a known population standard deviation34 B: Two-way ANOVA is not correct, because it is a parametric test that compares the means of two or more groups that are influenced by two independent factors. Two-way ANOVA assumes that the data follows a normal distribution, has homogeneous variances, and has independent observations.
C: Correlation coefficient is not correct, because it is a parametric test that measures the strength and direction of the linear relationship between two continuous variables. Correlation coefficient assumes that the data follows a bivariate normal distribution and has no outliers.


NEW QUESTION # 137
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