Databases Quiz Quiz Database Expert Quiz 10 Pradip Devkar November 6, 2024 These questions require a solid understanding of database theory, practical SQL skills, and the ability to apply database management strategies. Let me know if you’d like more questions or a focus on specific areas! Database Expert Quiz 10 1 / 10 When using Bitmap Indexes in a database, they are most suitable for: High-cardinality columns with a wide range of unique values Columns with a low-cardinality, such as boolean or status columns High-frequency transactional databases Foreign key columns that join multiple tables 2 / 10 In a distributed database, which of the following methods is least effective in resolving the issue of data consistency? Two-phase commit protocol Eventual consistency model Optimistic concurrency control Strong consistency enforcement 3 / 10 Which SQL window function would you use to calculate a cumulative total over a result set? ROW_NUMBER() RANK() SUM() OVER() PARTITION BY 4 / 10 Which of the following best describes the purpose of sharding in a NoSQL database environment? Maintaining a consistent hashing algorithm across servers Replicating data to improve read reliability Partitioning data horizontally to improve scalability and performance Splitting tables based on columns to improve I/O efficiency 5 / 10 Which isolation level permits a transaction to see uncommitted changes made by other transactions, which could result in dirty reads? Read Committed Repeatable Read Serializable Read Uncommitted 6 / 10 In SQL Server, what is the purpose of partitioned views, and when would you use them? To improve read performance by distributing data across multiple tables based on key ranges To ensure data is always available across multiple database servers To increase data redundancy for fault tolerance To enhance write performance by partitioning based on write frequency 7 / 10 In OLAP (Online Analytical Processing), the term "drill-through" specifically refers to: Aggregating data from multiple tables for analysis Navigating from summary data to detailed data within the same database Applying filters to narrow down result sets Performing a "slice" operation on multidimensional data 8 / 10 Which of the following ACID properties ensures that partial transactions do not make changes to the database state? Consistency Isolation Atomicity Durability 9 / 10 When considering horizontal partitioning in a distributed database, which of the following is a primary benefit? Improved query speed on smaller partitions for specific queries Increased fault tolerance through data redundancy Enhanced consistency across all partitions Simplified data management by storing all rows of a table together 10 / 10 In SQL, what is the main purpose of a "HAVING" clause? To filter rows before any grouping is applied To filter aggregated data after the GROUP BY clause To join tables based on a condition To impose a condition on data without using a WHERE clause Your score isThe average score is 27% 0% Restart quiz Share this… Whatsapp Linkedin Facebook Twitter Gmail Related Tags: #Databases Quiz, #Quiz Continue Reading Previous Deep Learning Advanced Quiz 7Next Deep Learning Advanced Quiz 8 More Stories Natural Language Processing Quiz Quiz NLP Medium Quiz 5 Pradip Devkar November 7, 2024 Natural Language Processing Quiz Quiz NLP Medium Quiz 4 Pradip Devkar November 7, 2024 Deep Learning Quiz Quiz Deep Learning Expert Quiz 10 Pradip Devkar November 6, 2024 Leave a Reply Cancel replyYou must be logged in to post a comment.
