Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
What is the primary function of a parser in query processing?
What is the primary function of a parser in query processing?
- Checking query syntax compliance (correct)
- Identifying query tokens
- Determining disk access speed
- Validating attribute names
Which factor is a major contributor to the total time cost in executing a query?
Which factor is a major contributor to the total time cost in executing a query?
- Memory operation speed
- Disk accesses (correct)
- Network communication cost
- CPU time to execute a query
Why is disk access considered a predominant cost in query processing?
Why is disk access considered a predominant cost in query processing?
- It doesn't involve any time cost
- It is faster than in-memory operations
- Disk access is generally slower than in-memory operations (correct)
- It consumes less CPU time
What is the reason for the cost of writing a block being greater than reading a block in query processing?
What is the reason for the cost of writing a block being greater than reading a block in query processing?
Signup and view all the answers
What does the scanner do during query processing?
What does the scanner do during query processing?
Signup and view all the answers
What is the cost of linear search in the best case scenario?
What is the cost of linear search in the best case scenario?
Signup and view all the answers
What condition allows the system to stop searching in linear search?
What condition allows the system to stop searching in linear search?
Signup and view all the answers
Which algorithm is faster between linear search and binary search?
Which algorithm is faster between linear search and binary search?
Signup and view all the answers
What is the primary advantage of pipelining over materialization in evaluating expressions?
What is the primary advantage of pipelining over materialization in evaluating expressions?
Signup and view all the answers
What is query optimization primarily focused on?
What is query optimization primarily focused on?
Signup and view all the answers
