
Understanding Query Processing Concepts

Quiz
•
Professional Development
•
Professional Development
•
Hard
Priya Kandan
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is query processing cost estimation?
The process of optimizing database storage space.
A method for securing database queries from unauthorized access.
The analysis of user behavior in database interactions.
Query processing cost estimation is the evaluation of the resources needed to execute a database query.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Name two common join strategies used in databases.
Merge join
Cross join
Self join
Nested loop join, Hash join
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the key concepts of transaction processing?
Network security protocols
Key concepts of transaction processing include ACID properties, concurrency control, and recovery mechanisms.
Data encryption techniques
User authentication methods
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define atomicity in the context of transactions.
Atomicity means transactions can be split into multiple parts.
Atomicity ensures that a transaction is all-or-nothing.
Atomicity refers to the speed of transaction processing.
Atomicity allows partial transactions to be committed.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does durability ensure data integrity in transactions?
Durability allows for faster transaction processing, which improves data integrity.
Durability ensures that committed transactions are permanent and protected from data loss, thus maintaining data integrity.
Durability prevents unauthorized access to data, ensuring integrity.
Durability is only relevant for temporary data storage, not for transactions.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of a query execution plan?
The purpose of a query execution plan is to optimize the execution of a database query by detailing the steps and methods for data retrieval.
To display the total number of records in a table.
To provide a summary of the database structure.
To generate random data for testing purposes.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between inner join and outer join.
Inner join returns matched rows; outer join returns all rows with NULLs for non-matches.
Inner join returns all rows; outer join returns only matched rows.
Inner join includes NULLs for non-matches; outer join does not.
Inner join and outer join are the same; both return all rows.
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