Data Coupling — Learn free

Self-check

Questions 1–10 of 10

1. How is Coupling described in relation to software and systems?
Question 1A. A way of compressing data before it moves between systemsB. A technique for merging two databases into oneC. A parameter dependency approach used across software or across systemsD. A method of encrypting data in transitE. A schema design pattern for a single application
2. What is Data Coupling about?
Question 2A. Using data elements to kick off the next step in a different systemB. Storing the same data in two systems for redundancyC. Joining two tables on a shared keyD. Copying a whole database to a backup locationE. Converting data from one format to another
3. Which example is used to illustrate Data Coupling in a data pipeline?
Question 3A. A retailer reconciling daily sales totals at midnightB. A bank archiving transactions older than seven yearsC. A weather service publishing hourly forecastsD. A social media feed being scanned for product mentionsE. A hospital management system in which a baby's data is pulled the moment the baby is registered
4. What is the disadvantage of the Data Coupling approach?
Question 4A. It requires all systems to share the same databaseB. If something goes wrong in the first system, the dependent systems cannot moveC. It doubles the storage needed for every datasetD. It only works with structured dataE. It prevents systems from being updated independently
5. In the old file-loading example of Data Coupling, what was the core challenge when pulling files from another system?
Question 5A. Files were too large to fit on a single serverB. The file format changed with every loadC. The receiving system had no permission to read the filesD. Knowing when the file had been completely copied so that pulling could safely startE. The source system deleted files as soon as they were written
6. Which workaround for the file-copy challenge in Data Coupling involves renaming?
Question 6A. Copy the file under a different name, then rename it once the copy is complete so the pulling job can recognise itB. Rename the source system so the pulling job cannot connect too earlyC. Rename the pulling job after each successful runD. Rename the target folder after the file has been readE. Rename the file to include a timestamp before copying begins
7. Which workaround for the file-copy challenge in Data Coupling relies on a temp file?
Question 7A. Write the data into a temp file and delete it once the pulling job has finishedB. Split the data file into several temp files that are pulled one by oneC. Create a temp file after the data file is completely copied, so the pulling job starts when it sees the temp fileD. Keep a temp file open for the whole duration of the copyE. Store the file's checksum in a temp file before copying starts
8. How do modern export, copy or move commands signal that a file copy is still in progress?
Question 8A. They lock the destination folder until the copy finishesB. They send an email notification on completionC. They write a log entry that the pulling job must readD. They keep the file hidden until it has been verifiedE. They add tmp to the file name while in progress and remove it once the copy is done
9. Which of these is NOT among the listed types of coupling?
Question 9A. Stamp CouplingB. Temporal CouplingC. Control CouplingD. External CouplingE. Content Coupling
10. Which of these is one of the listed types of coupling?
Question 10A. Schema CouplingB. Network CouplingC. Index CouplingD. No Direct CouplingE. Transaction Coupling