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 131
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 132
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 133
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 134
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 135
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 136
- Exam Question
- Correct Answer
- DA0-001 Question 137
- Exam Question
- Correct Answer
- DA0-001 Question 138
- Exam Question
- Correct Answer
- DA0-001 Question 139
- Exam Question
- Correct Answer
- DA0-001 Question 140
- Exam Question
- Correct Answer
DA0-001 Question 131
Exam Question
Consider the following data set.
Which of the following data manipulation techniques would arrange the data set in decreasing order of total marks so that who scored highest marks is in the top row, and who scored lowest marks is in the last row?
A. CURDATE()
B. Sorting
C. Filtering
D. IsEmpty()
Correct Answer
B. Sorting
Explanation
The correct answer is: Sorting Sorting lets you organize all or part of your data in ascending or descending order. Note that you cannot undo a sort after it has been saved so you’ll want to make sure that all of your rows in your sheet, including parent rows in a hierarchy, are ordered the way you want before saving.
DA0-001 Question 132
Exam Question
Which of the following policies is a set of guidelines that helps organizations keep track of how long information must be kept and how to dispose of the information when it’s no longer needed?
A. Acceptance use policy
B. Data retention policy
C. Data deletion policy
D. Data processing policy
Correct Answer
B. Data retention policy
Explanation
A data retention policy is a set of guidelines that helps organizations keep track of how long information must be kept and how to dispose of the information when it’s no longer needed. The policy should also outline the purpose of processing personal data. This ensures that you have documented proof that justifies your data retention and disposal periods.
DA0-001 Question 133
Exam Question
A data analyst wants to measure how well a piece of information reflects reality.
Which of the following data quality dimensions does the data analyst need to assess?
A. Data integrity
B. Data consistency
C. Data completeness
D. Data accuracy
Correct Answer
D. Data accuracy
Explanation
How can you assess your data quality? Data quality meets six dimensions: accuracy, completeness, consistency, timeliness, validity, and uniqueness. Read on to learn the definitions of these data quality dimensions. Accuracy Completeness Consistency Timeliness Validity Uniqueness Six data quality dimensions to assess:
| Dimension | |
|---|---|
| Accuracy | How well does a piece of information reflect reality? |
| Completeness | Does it fulfill your expectations of what’s comprehensive? |
| Consistency | Does information stored in one place match relevant data stored elsewhere? |
| Timeliness | Is your information available when you need it? |
| Validity | Is information in a specific format, does it follow business rules, or is it in an unusable format? |
| Uniqueness | Is this the only instance in which this information appears in the database? |
DA0-001 Question 134
Exam Question
A financial analyst gathers information, assembles spreadsheets, and writes reports. He wants every time he makes changes to the files, these will be synced and updated across all of his devices.
Which of the following storage environments does the analyst need to save his file?
A. Cloud storage
B. Sync storage
C. Local storage
D. Share drive
Correct Answer
A. Cloud storage
Explanation
Cloud services are popular because enable many businesses to access application software without the need for investing in computer software and hardware. Other benefits include scalability, reliability, and efficiency. All these advantages allow organizations to focus on other relevant aspects such as product development and innovation.
Pros of cloud storage:
- Cost: Buying physical storage or hardware can be expensive. Cloud storage is cheaper per GB than using external drives.
- Accessibility: Cloud storage gives you access to your files from anywhere. All you need is an internet connection.
- Security: Cloud storage is safer than local storage because providers have added additional layers of security to their services. Thanks to the use of encryption algorithm, only authorized personnel such as you and your employees have access to the documents and files stored in the cloud.
- Syncing and updating: When you are working with cloud storage, every time you make changes to a file, these will be synced and updated across all of your devices. That will save you a lot of time and simplify your job.
- Recovery: In case of a hard drive failure or other hardware malfunction, you can access your files on the cloud, which acts as a backup solution for your local storage on physical drives
DA0-001 Question 135
Exam Question
A database administrator is responsible to optimise the data queries from 800ms to 300ms by using indexing.
Which of the following techniques, indexing uses to make columns faster to query?
A. Filter the data using logical functions
B. Create pointers where data is stored within a database
C. Duplicate the table where data is stored with less data
D. Sort the data alphabetically
Correct Answer
B. Create pointers where data is stored within a database
Explanation
Indexing makes columns faster to query by creating pointers to where data is stored within a database.
Indexes allow us to create sorted lists without having to create all new sorted tables, which would take up a lot of storage space.
An index is a structure that holds the field the index is sorting and a pointer from each record to their corresponding record in the original table where the data is actually stored. Indexes are used in things like a contact list where the data may be physically stored in the order you add people’s contact information but it is easier to find people when listed out in alphabetical order.
DA0-001 Question 136
Exam Question
What technique is used to swap the values in rows and columns of tabular data?
A. Association.
B. Transposition.
C. Classification.
D. Regression.
Correct Answer
B. Transposition.
DA0-001 Question 137
Exam Question
What role in a data governance is typically responsible for day-to-day oversight of data use?
A. Data owners.
B. Data processors.
C. Data custodians
D. Data stewards.
Correct Answer
D. Data stewards.
DA0-001 Question 138
Exam Question
Which one of the following is NOT one of the five dimensions of data quality?
A. Accuracy
B. Confidentiality.
C. Consistency.
D. Completeness.
Correct Answer
B. Confidentiality.
DA0-001 Question 139
Exam Question
What is the most time-consuming of the practices that authorize international data transfers under GDPR?
A. Binding corporate rules.
B. Privacy shield.
C. Memoranda of understanding.
D. Standard contractual clauses.
Correct Answer
A. Binding corporate rules.
DA0-001 Question 140
Exam Question
Data validation should occur only when data is initially brought into a organization.
A. True.
B. False.
Correct Answer
B. False.