Data Usability — Learn free

Self-check

Questions 1–10 of 10

1. What is the difference between a system being useful and being usable?
Question 1A. Useful means it is cheap; usable means it is expensiveB. Useful means it fulfils the business requirements; usable means how easy and automated it is for operational tasksC. Useful means it is in the cloud; usable means it is on-premisesD. Useful means it is documented; usable means it is testedE. There is no difference
2. In the marketing-campaign example, why is dumping data from five source systems into a Data Lake useful but not usable?
Question 2A. Because a Data Lake cannot store structured dataB. Because all the data is in one place but not yet in a format the marketing team can easily use for campaignsC. Because the marketing team lacks access rightsD. Because the data has not been encryptedE. Because five systems is too many
3. Where should data be formatted so that it becomes usable for the relevant team?
Question 3A. In the OLTP source systemsB. In a floppy-drive archiveC. In a Data Warehouse, a Data Mart or a Semantic LayerD. In a development database instanceE. In a synthetic dataset
4. What proportion of data in the Big Data era is said to come from semi- and unstructured sources?
Question 4A. Around 10%B. Around 50%C. Around 75%D. 90% or moreE. Exactly 100%
5. Which standard's definition of usability is quoted: 'the extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use'?
Question 5A. ISO 27001B. ISO 8000C. ISO 9241D. ISO 9001E. GDPR
6. Which of the following is NOT one of the listed dimensions of Data Usability?
Question 6A. Data should be relevant for the stakeholdersB. Data Quality should be high so stakeholders can trust itC. Enough data points should be available for decision makingD. Data should be stored on-premises onlyE. Data should be available in an easy-to-use format for analysis
7. In the characteristics of Data Usability, what does 'Effective' mean?
Question 7A. Accurate and impactfulB. Time bound as requiredC. Easy to understandD. ProtectedE. Accessible to all relevant parties
8. Which characteristic of Data Usability means data is easy to download or send to other systems?
Question 8A. ReusableB. LearnableC. AppealingD. MemorableE. Utilisable
9. Which characteristic of Data Usability refers to use on multiple types of devices such as desktops, laptops, mobiles and tablets?
Question 9A. ReusableB. AccessibleC. SafeD. EfficientE. Understandable
10. What is the ideal action for semi- and unstructured data so that stakeholders can use it?
Question 10A. Leave it in its raw form in the Data LakeB. Delete it once it has been viewedC. Export it to spreadsheetsD. Encrypt it and restrict accessE. Convert it into structured format inside a proper data model