The latest CompTIA Data+ DA0-001 certification actual real practice exam question and answer (Q&A) dumps are available free, which are helpful for you to pass the CompTIA Data+ DA0-001 exam and earn CompTIA Data+ DA0-001 certification.
Table of Contents
- DA0-001 Question 111
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 112
- Exam Question
- Correct Answer
- DA0-001 Question 113
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 114
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 115
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 116
- Exam Question
- Correct Answer
- DA0-001 Question 117
- Exam Question
- Correct Answer
- DA0-001 Question 118
- Exam Question
- Correct Answer
- DA0-001 Question 119
- Exam Question
- Correct Answer
- DA0-001 Question 120
- Exam Question
- Correct Answer
DA0-001 Question 111
Exam Question
A web developer wants to ensure that malicious users can\\’t type SQL statements when they asked for input, like their username/userid.
Which of the following query optimization techniques would effectively prevent SQL Injection attacks?
A. Indexing.
B. Subset of records.
C. Temporary table in the query set.
D. Parametrization.
Correct Answer
D. Parametrization.
Explanation
Parametrization. Parameterized SQL queries allow you to place parameters in an SQL query instead of a constant value. A parameter takes a value only when the query is executed, allowing the query to be reused with different values and purposes. Parameterized SQL statements are available in some analysis clients, and are also available through the Historian SDK.
For example, you could create the following conditional SQL query, which contains a parameter for the collector\\’s name: SELECT* FROM ExamsDigest WHERE coursename=? ORDER BY tagname SQL Injection is best prevented through the use of parameterized queries.
DA0-001 Question 112
Exam Question
What type of access permission system is most appropriate for a dashboard?
A. Attribute-based.
B. Role-based.
C. Mandatory.
D. Rule-based.
Correct Answer
B. Role-based.
DA0-001 Question 113
Exam Question
You would like to combine the text in two different strings to form a single string. What action are you performing?
A. Trimming.
B. Case conversion.
C. Parsing.
D. Concatenation.
Correct Answer
D. Concatenation.
Explanation
Simply defined, concatenation is the act of linking things together. In Microsoft Excel, the concatenation function is one of many text functions, which allows users to combine data distributed over multiple columns.
The concatenation of two or more numbers is the number formed by concatenating their numerals.
For example, the concatenation of 1, 234, and 5678 is 12345678.
DA0-001 Question 114
Exam Question
Chris is building a database to store prices for items on a restaurant menu.
What data type is most appropriate for this field?
A. Numeric.
B. Date.
C. Tags.
D. Alphanumeric.
Correct Answer
A. Numeric.
Explanation
Numeric Prices are numbers stored in dollars and cents; as such, the data type needs to be capable of storing numbers.
DA0-001 Question 115
Exam Question
What cybersecurity goal protects an organization\\’s data from unauthorized modification?
A. Confidentiality.
B. Non-repudiation.
C. Integrity.
D. Availability.
Correct Answer
C. Integrity.
Explanation
The term data integrity refers to the accuracy and consistency of data. When creating databases, attention needs to be given to data integrity and how to maintain it. A good database will enforce data integrity whenever possible. For example, a user could accidentally try to enter a phone number into a date field.
DA0-001 Question 116
Exam Question
Which one of the following values would not be appropriately stored in integer data type?
A. -16
B. 10921
C. 0
D. 1.2
Correct Answer
D. 1.2
DA0-001 Question 117
Exam Question
A data analyst for a media company needs to determine the most popular movie genre. Given the table below:
| MovieID | Name | Genre | Actors | Rating |
|---|---|---|---|---|
| 01 | Ghost Writer | Comedy, Actions | Joshua Wellington, Susana Summons | 6.5 |
| 02 | Life of Suffering | Drama, Foreign, Historical | Shelly May, Rita Moralle, Ethan Warner, Sean Houser | 7.2 |
Which of the following must be done to the Genre column before this task can be completed?
A. Append
B. Merge
C. Concatenate
D. Delimit
Correct Answer
D. Delimit
DA0-001 Question 118
Exam Question
Data definitions should be written in plain language.
A. True.
B. False.
Correct Answer
A. True.
DA0-001 Question 119
Exam Question
You would like to know whether the mean height of a group of children is statistically significantly different from that of another group.
What statistical test would be most appropriate?
A. Chi-square test
B. t-test
C. Sigma test
D. p-test
Correct Answer
B. t-test
DA0-001 Question 120
Exam Question
Analyze the values of X shown below
(2,2,5,6,7)
What is the modal value?
A. 7
B. 6
C. 5
D. 2
Correct Answer
D. 2