Question

What is the difference between valid time and transaction time in the context of temporal databases?

a.

Valid time captures when data is stored in the database, while transaction time captures the time period during which a fact is considered true.

b.

Valid time captures the time period during which a fact is considered true, while transaction time captures when data is stored in the database.

c.

Valid time and transaction time are synonymous and can be used interchangeably.

d.

Valid time refers to past events, while transaction time refers to future events.

Posted under Big Data Computing

Answer: (b).Valid time captures the time period during which a fact is considered true, while transaction time captures when data is stored in the database. Explanation:In the context of temporal databases, valid time captures the time period during which a fact is considered true, while transaction time captures when data is stored in the database.

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. What is the difference between valid time and transaction time in the context of temporal databases?

Add Comment

Similar Questions

Discover Related MCQs

Q. What is a bitemporal database?

View solution

Q. In the temporal SQL query "SELECT ID, Location, Value FROM Sensor WHERE Start >= 20 and End <= 27," what is the expected result with respect to abstract temporal databases?

View solution

Q. What does the SQL query "SELECT ID, Value, Start, End FROM Sensor WHERE Start <= 23 and End >= 27" retrieve?

View solution

Q. In the context of stream-based query answering, what is the key idea?

View solution

Q. What is the purpose of sliding time windows in stream-based query answering?

View solution

Q. What are temporal aggregation operators used for in stream-based query languages?

View solution

Q. What are some extensions to the RDF query language SPARQL that have been proposed for stream-based access scenarios?

View solution

Q. In the context of stream-based query answering, what does C-SPARQL rely on for dealing with entailments for RDFS or OWL 2 RL?

View solution

Q. What is SNEEQL?

View solution

Q. What is EP-SPARQL tailored for?

View solution

Q. What is CQELS known for in the context of stream-based query implementations?

View solution

Q. How does T-SPARQL apply techniques from temporal databases to RDF querying?

View solution

Q. What combination of querying approaches is considered useful in applications?

View solution

Q. What was a design goal in early work on deductive event recognition?

View solution

Q. Why are brute-force approaches for query answering with respect to ontologies not suitable for large real-world ontologies?

View solution

Q. What is one promising idea for scalable stream-based answering of continuous queries?

View solution

Q. What was the traditional assumption made by OBDA approaches regarding query execution?

View solution

Q. Why is the assumption of centralized query execution not usually applicable in the real world for OBDA?

View solution

Q. What is FedX in context of query execution ?

View solution

Q. What is one of the important advantages of cloud computing, especially IaaS, PaaS, and SaaS clouds?

View solution

View All MCQs on Big Data Computing

Suggested Topics

Are you eager to expand your knowledge beyond Big Data Computing? We've curated a selection of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!

Operating System

Dive deep into the core of computers with our Operating System MCQs. Learn about...

Embedded Systems

Dive into the world of specialized computing systems with our Embedded Systems MCQs....

Compiler Design

Unravel the process of translating source code into executable programs with our...

Internet of Things (IoT)

Discover how devices communicate with each other in the smart world with our IoT...

Hadoop

Dive into the world of big data with our Hadoop MCQs. Cover key concepts including...

UNIX

Become proficient with the Unix operating system using our UNIX MCQs. Learn about...

Digital Image Processing (DIP)

Delve into the techniques of enhancing digital images with our Digital Image...

IT Fundamentals

Navigate the basics of information technology with our IT Fundamentals MCQs. Get a...

C Programming

Master one of the most widely used programming languages with our C Programming MCQs....