WGU D547 Data Analysis Study Guide
Updated 2026/2027 Syllabus | 100+ Questions & Answers
Domain 1: Foundations of Data & Information Systems
Q1. What is the primary purpose of data analysis in nursing practice?
ANSWER ✓ To inform evidence-based clinical decision-making .
Q2. According to the DIKW Hierarchy, what defines the transition from raw facts
to processed data with meaning?
ANSWER ✓ The hierarchy defines the transition of Data to Information to Knowledge
to Wisdom. Information is data that has been organized or structured for usefulness .
Q3. Which characteristic of quality data requires that the information apply
directly to the decision being made?
ANSWER ✓ Relevance .
Q4. A nurse manager notices that a dataset has the same patient counted twice
under different ID numbers. Which characteristic of quality data is being violated?
ANSWER ✓ Accuracy. Data should be captured only once, where possible, and
captured as close to the point of activity as possible .
Q5. Why is "timeliness" considered a critical characteristic of quality data in an
emergency department setting?
ANSWER ✓ Data must be efficient and provided in a timely manner. In an ED, delayed
data (e.g., old lab results) could lead to incorrect clinical decisions .
Q6. What does the "Availability" principle in the CIA Triad refer to in healthcare
data security?
ANSWER ✓ It refers to ensuring that data is accessible to authorized users when
needed (e.g., ensuring EHRs are not down during a code blue) .
Q7. In the IPOS cycle of computing, what is the function of "Processing"?
ANSWER ✓ Raw data is organized or structured for usefulness .
, Q8. Which type of memory is considered volatile and temporarily stores data
before it is processed?
ANSWER ✓ RAM (Random Access Memory). It loses data when the computer is turned
off .
Q9. What is a "Byte"?
ANSWER ✓ 8 bits; a single character of text in a computer .
Q10. What does "Moore's Law" predict regarding computer hardware?
ANSWER ✓ The doubling of transistor count on a microchip roughly every 18-24
months (exponential increase in processing power) .
Q11. What is the role of a "Proxy Server" in a healthcare network?
ANSWER ✓ It acts as a giant cache of web pages and can be used to block access to
certain web pages to enforce organizational internet policies .
Q12. What is "Defense in Depth"?
ANSWER ✓ Protecting every layer that surrounds data (network, host, application, data)
rather than just relying on a single firewall .
Q13. Which type of backup copies everything on the hard drive each time it is
performed?
ANSWER ✓ Full backup .
Q14. A "Cold Site" in disaster recovery refers to what?
ANSWER ✓ A physical location like an empty shell that can be used for operations, but
is not equipped with hardware or servers. It is cheaper but slower to activate .
Q15. What does "Redundancy" ensure in data storage?
ANSWER ✓ It ensures proper storage of data by providing a means so that data is
available even when storage devices are damaged or offline (e.g., RAID) .
Q16. Which generation of computers was characterized by the use of vacuum
tubes and machine language?
ANSWER ✓ 1st Generation .
Q17. What is the difference between a "Hub" and a "Switch" in a network?
ANSWER ✓ A hub sends data to all computers on the network, while a switch only
sends data to the specific intended computer .
Updated 2026/2027 Syllabus | 100+ Questions & Answers
Domain 1: Foundations of Data & Information Systems
Q1. What is the primary purpose of data analysis in nursing practice?
ANSWER ✓ To inform evidence-based clinical decision-making .
Q2. According to the DIKW Hierarchy, what defines the transition from raw facts
to processed data with meaning?
ANSWER ✓ The hierarchy defines the transition of Data to Information to Knowledge
to Wisdom. Information is data that has been organized or structured for usefulness .
Q3. Which characteristic of quality data requires that the information apply
directly to the decision being made?
ANSWER ✓ Relevance .
Q4. A nurse manager notices that a dataset has the same patient counted twice
under different ID numbers. Which characteristic of quality data is being violated?
ANSWER ✓ Accuracy. Data should be captured only once, where possible, and
captured as close to the point of activity as possible .
Q5. Why is "timeliness" considered a critical characteristic of quality data in an
emergency department setting?
ANSWER ✓ Data must be efficient and provided in a timely manner. In an ED, delayed
data (e.g., old lab results) could lead to incorrect clinical decisions .
Q6. What does the "Availability" principle in the CIA Triad refer to in healthcare
data security?
ANSWER ✓ It refers to ensuring that data is accessible to authorized users when
needed (e.g., ensuring EHRs are not down during a code blue) .
Q7. In the IPOS cycle of computing, what is the function of "Processing"?
ANSWER ✓ Raw data is organized or structured for usefulness .
, Q8. Which type of memory is considered volatile and temporarily stores data
before it is processed?
ANSWER ✓ RAM (Random Access Memory). It loses data when the computer is turned
off .
Q9. What is a "Byte"?
ANSWER ✓ 8 bits; a single character of text in a computer .
Q10. What does "Moore's Law" predict regarding computer hardware?
ANSWER ✓ The doubling of transistor count on a microchip roughly every 18-24
months (exponential increase in processing power) .
Q11. What is the role of a "Proxy Server" in a healthcare network?
ANSWER ✓ It acts as a giant cache of web pages and can be used to block access to
certain web pages to enforce organizational internet policies .
Q12. What is "Defense in Depth"?
ANSWER ✓ Protecting every layer that surrounds data (network, host, application, data)
rather than just relying on a single firewall .
Q13. Which type of backup copies everything on the hard drive each time it is
performed?
ANSWER ✓ Full backup .
Q14. A "Cold Site" in disaster recovery refers to what?
ANSWER ✓ A physical location like an empty shell that can be used for operations, but
is not equipped with hardware or servers. It is cheaper but slower to activate .
Q15. What does "Redundancy" ensure in data storage?
ANSWER ✓ It ensures proper storage of data by providing a means so that data is
available even when storage devices are damaged or offline (e.g., RAID) .
Q16. Which generation of computers was characterized by the use of vacuum
tubes and machine language?
ANSWER ✓ 1st Generation .
Q17. What is the difference between a "Hub" and a "Switch" in a network?
ANSWER ✓ A hub sends data to all computers on the network, while a switch only
sends data to the specific intended computer .
