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Q10
Data consistency is a big deal in data processing.
a. What needs to be sacrificed, to ensure high degree/level/amount of consistency?
b. Discuss two issues that would result when there is lack of consistency
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- What are the potential pitfalls of having excessively normalized data structures?Which of the studied data structures in this course would be the most appropriate choice for the following tasks? And Why? a) A training institute needs to maintain a database of 2000 identification numbers of trainees who received an ICDL certification. The goal is to find rapidly whether or not a given ID is in the database. Ordering information among the identification numbers is not important; speed of response is very important; efficient use of memory is also important, but not as important as speed of response. b) A large fixed content of data needs to be maintained. It is sorted and the admin needs to search for and retrieve existing items, but no new/existing items will be inserted/deleted. You may assume that the data can fit inside the memory of the computer. c) A transposition table is a cache of previously seen positions in a game tree generated by a computer game playing program. If a position recurs via a different sequence of moves, the value of the position is…Distinguish between deadlock and data coherence problem.
- Which of the studied data structures in this course would be the most appropriate choice for the following tasks? And Why? a) A training institute needs to maintain a database of 2000 identification numbers of trainees who received an ICDL certification. The goal is to find rapidly whether or not a given ID is in the database. Ordering information among the identification numbers is not important; speed of response is very important; efficient use of memory is also important, but not as important as speed of response. b) A large fixed content of data needs to be maintained. It is sorted and the admin needs to search for and retrieve existing items, but no new/existing items will be inserted/deleted. You may assume that the data can fit inside the memory of the computer. To be submitted through Turnitin. Maximum allowed similarity is 15%.During the discussion of consistency models, we often referred to the con tract between the software and data store. Why is such a contract needed?Explain the concept of distributed data consistency and the challenges of maintaining strong consistency in systems with high data update rates. Provide examples of scenarios where strong consistency is crucial.
- What is a benefit of using a lookup table? a.) They resolve weak relationships. b.) They build in extra data redundancies. c.) They model pure relationships rather than entities. d.) They contribute to storage savings.Explain the benefits and drawbacks of various data warehousing architectures, such as the Kimball and Inmon methodologies. When is each methodology most suitable?Discuss the concept of data consistency models in distributed databases (e.g., eventual consistency, strong consistency). How do different consistency models affect data operations and system performance?
- When it comes to data transformation, it may vary from something as basic as a change in data format or representation to something as complex as an integration strategy involving multiple and diverse data sources. Does this statement hold up as true or false?What's the difference between structural and data independenceHow do data dictionaries aid in conflict resolution during data integration?