Data Terms Advanced Quiz 1
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Quiz 1
1. What does the "CAP Theorem" state about distributed data stores?
A system can meet two of Consistency, Availability, Partition Tolerance
A system can only provide two out of three
Consistency requires giving up Availability or Partition Tolerance
2. What is "Eventual Consistency"?
All nodes eventually have the same data if no new updates occur
Data is deleted after each access
Transactions must complete within a set time
3. In distributed databases, what is a "Quorum"?
The maximum number of concurrent users allowed on a database
A method of securing passwords using encryption
Minimum nodes required to approve an operation
4. What is the primary purpose of "Write-Ahead Logging" (WAL)?
Recording changes before applying them to ensure durability
Monitoring which users are currently logged into the system
Enhancing server performance for network operations
5. What characterizes a "Lambda Architecture"?
Relies solely on serverless functions for processing
Combining batch and real-time processing using separate layers
A system using symbolic column names.
6. What are "Vector Clocks" used for?
Measuring the distance between different server locations
Scheduling backup tasks across multiple time zones
Tracking event order and detecting conflicts
7. What is "Data Gravity"?
Large datasets attract more applications and services
The literal weight of servers storing the data
The rate at which data moves through pipelines in a system
8. What is "Z-Ordering" in modern data formats?
Sorting data alphabetically from Z to A
Mapping multi-dimensional data into one dimension
Automatically removing old or unused data
9. In a distributed context, what is "Split-Brain"?
Malware that fragments system memory
Two developers editing the same file simultaneously
A cluster splitting, each part thinking it is the master
10. What is "Multi-Region Replication"?
Storing copies of data across multiple geographic locations
Synchronizing data between primary and foreign key relationships
Managing separate executives in different countries for oversight
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