IM102 MIDTERM LONG QUIZ
IM102 Database Midterm Quiz
Test your knowledge and understanding of database concepts with our comprehensive midterm quiz specifically designed for IM102 students. The quiz covers essential topics including normalization, transactions, indexing, and performance tuning.
- 20 multiple-choice questions
- Instant feedback on your answers
- Enhance your database skills for better academic performance
A database index improves query performance by sorting the data physically.
True
False
Normalization is the process of organizing data in a database so that it is consistent and free of redundant data.
True
False
Denormalization is the process of adding redundancy to a database to improve performance.
True
False
Transactions are used in databases to ensure that a series of related operations are treated as a single, atomic operation.
True
False
The design phase of the database development life cycle involves creating the physical database schema.
True
False
Implementation is the phase where the actual database is created and populated with data.
True
False
Testing is not necessary in the database development life cycle since the schema can be tested during implementation.
True
False
Maintenance is not an important phase of the database development life cycle since the database has already been implemented.
True
False
The waterfall model is the most commonly used model for database development.
True
False
The software development life cycle is a process that ends once the software system has been implemented.
True
False
Which of the following is not a transaction property?
Atomicity
Consistency
Isolation
Durability
All of the above are transaction properties.
What is the purpose of a lock in a database system?
To ensure consistency.
To prevent deadlocks.
To enforce serializability.
To ensure that transactions can be rolled back.
All of the above.
Which of the following is a disadvantage of locking?
Reduced concurrency
Increased consistency
Increased isolation
Reduced durability
All of the above.
Which of the following is not a concurrency control method?
Locking
Timestamp ordering
Validation
Two-phase commit
All of the above are concurrency control methods.
Which of the following is a technique for reducing the overhead of concurrency control?
Locking
Optimistic concurrency control
Validation
Two-phase commit
None of the above.
Which of the following can help improve the performance of a database query?
Adding more indexes to the database
Optimizing the query execution plan
Reducing the number of joins in the query
All of the above
None of the above
Which of the following is an example of a query optimization technique?
Using subqueries instead of joins
Limiting the number of rows returned by the query
Removing unnecessary columns from the query result
All of the above
None of the above
What is the purpose of a database index?
To store a copy of the database table
To speed up database queries
To ensure data consistency
All of the above
None of the above
Which of the following is a technique for database performance tuning?
Increasing the amount of system memory available to the database server
Increasing the number of database server instances
Scaling the database server horizontally by adding more nodes
All of the above
None of the above
Which of the following is an example of a data model that can negatively impact database performance?
A normalized data model with many tables and relationships
A denormalized data model with fewer tables and more redundancy
Both a and b can negatively impact performance, depending on the specific use case
Neither a nor b can negatively impact performance, as long as they are properly designed
None of the above
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