Data Replication — Learn free

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Questions 1–10 of 10

1. What is Data Replication?
Question 1A. The process of deleting duplicate records from a datasetB. The process of compressing a dataset for long-term archivingC. The process of creating and maintaining multiple copies of the same dataset in different locations or systemsD. The process of translating data between formatsE. The process of encrypting a dataset before sharing it
2. What are the goals of Data Replication?
Question 2A. To reduce storage costs and remove old dataB. To anonymise data and satisfy regulatorsC. To standardise data formats across vendorsD. To limit access to a single authoritative copyE. To ensure data availability, improve fault tolerance and enhance performance
3. How can replicated copies of data be kept consistent?
Question 3A. By synchronising them in real time or at scheduled intervalsB. By never allowing any copy to changeC. By deleting all but one copy each nightD. By storing every copy on the same serverE. By converting them to read-only PDF files
4. In the group project example of Data Replication, what is the first step?
Question 4A. Everyone edits a single shared document on one computerB. You create the document with the project details on your computer as the initial copyC. The group agrees a synchronisation scheduleD. Each member deletes their old copiesE. The document is uploaded to a backup tape
5. In the group project example, what does Synchronisation involve?
Question 5A. Choosing one member's copy and discarding all othersB. Locking the document so no one can edit itC. Printing every copy for comparisonD. Everyone sharing their updates so each person gets the latest version and all copies are consistentE. Merging the document with unrelated files
6. How does the group project example illustrate Data Availability?
Question 6A. Each group member has their own copy, so the document is available even if one person's computer is unavailableB. The document is available only when the group leader is onlineC. Availability depends on a single shared serverD. The document becomes available only after the project endsE. Availability is guaranteed by printing the document
7. How does Data Replication provide Fault Tolerance?
Question 7A. By validating every record before it is savedB. By preventing any user from making changesC. By storing data in a compressed formatD. If one copy is accidentally deleted or corrupted, other copies still exist, reducing the risk of data lossE. By running all queries on a single node
8. How does Data Replication improve performance?
Question 8A. By reducing the size of each copyB. Multiple copies can be accessed simultaneously, reducing the load on a single sourceC. By forcing all requests through one serverD. By caching data only in memoryE. By archiving rarely used data
9. What real-world analogy is used to explain Data Replication?
Question 9A. Keeping a diary in a locked drawerB. Paying for a subscription every monthC. Building a fence around a gardenD. Storing valuables in a single bank vaultE. Giving copies of a house key to different family members so each can enter, even if one loses their key
10. Where is Data Replication described as a common practice in the digital world?
Question 10A. In printed archives and librariesB. In social media marketingC. In databases, storage systems and distributed computing environmentsD. In payroll processing onlyE. In network cabling design