2.1 Data Lifecycle Management and Analytics Pipeline

Which phase of data lifecycle management focuses on moving infrequently used data to a separate location to free up live system resources?

• Destruction phase for secure disposal

• Creation phase for capturing initial entries

• Storage phase for primary data placement

• Archival phase for long-term retention

A company processes sales data, saves transformed results, performs statistical analysis, and then creates charts for managers. Identify the correct sequence of stages in the data analytics pipeline for this scenario.

• Analysis → Process → Storage → Capture → Visualisation

• Process → Capture → Analysis → Storage → Visualisation

• Capture → Process → Storage → Analysis → Visualisation

• Capture → Storage → Analysis → Process → Visualisation

Which statement best defines data accuracy in a business system?

• Being close to true real‑world values

• Arriving quickly to the processing unit

• Containing rich metadata and tags

• Being stored in multiple secure locations

A delivery robot’s GPS provides only an approximate location within 100 metres. Explain one impact this could have and why higher data quality is needed.

Fit for purpose data means it is

(a)  

Which scenario best illustrates data redundancy for assurance?

• Using faster sensors for updates

• Keeping copies in different locations

• Allowing approximate values for speed

• Deleting old entries to save space

Which statement best distinguishes validation from verification in data handling?

• Validation checks format and ranges at data entry

• Validation compares to a trusted source after collection

• Validation removes duplicates during data cleaning

• Validation confirms accuracy by contacting an email owner

Fill in the blank: Double entry is a verification method where the same data is entered (a)   so the system can compare the two entries for mismatches.

Which practice most directly reduces bias during interviews and surveys when gathering data?

• Plan questions and target right participants

• Record only answers that confirm expectations

• Ask vague questions without preparation

• Observe behavior without any structure

• Let interviewees guess preferred responses

Fill in the blank: Compared to HDDs, (a)   use flash memory and typically provide faster read performance but often at higher cost and lower capacity.