Which challenges are commonly encountered during data migration testing?

  • Data completeness
  • Data consistency
  • Data integrity
  • Data mapping errors
Data migration testing often faces challenges such as data mapping errors where data from the source doesn't align correctly with the target, leading to inconsistencies and issues in migration.

One approach to improving query performance with large data sets is through the use of ____________ indexing.

  • Bitmap
  • Clustered
  • Inverted
  • Partitioned
Bitmap indexing is a technique used to improve query performance on large datasets by creating a bitmap for each distinct value in a column. This bitmap indicates which rows contain that value, allowing for fast retrieval of relevant data. It is particularly effective for columns with low cardinality, where the number of distinct values is relatively small compared to the total number of rows.

Key rotation is a security practice that involves regularly changing and updating encryption ____________.

  • Algorithms
  • Hashes
  • Keys
  • Salts
Key rotation involves changing and updating encryption "keys" regularly to enhance security. By doing so, organizations mitigate the risk associated with long-term key exposure and maintain the integrity of their encryption systems.

What potential consequences could an e-commerce company face due to a security breach resulting from a lack of database testing?

  • Enhanced brand visibility and market competitiveness
  • Expansion of customer base and revenue growth
  • Increased customer satisfaction and loyalty
  • Loss of customer trust and reputation damage
A security breach in an e-commerce company due to inadequate database testing can lead to severe consequences such as loss of customer trust and reputation damage. Customers may lose confidence in the company's ability to protect their personal and financial information, resulting in decreased sales and tarnished brand reputation. Rebuilding trust post-breach can be challenging and costly, impacting long-term business viability.

Data migration testing verifies the accuracy and ____________ of data during the migration process.

  • Completeness
  • Consistency
  • Integrity
  • Validity
Data migration testing ensures the integrity of data, ensuring that it remains intact and unchanged during the migration process. This involves verifying that data relationships and dependencies are maintained.

SQL uses the ____________ clause to combine rows from two or more tables based on a related column between them.

  • GROUP BY
  • HAVING
  • JOINs
  • WHERE
JOINs are used to retrieve data from multiple tables based on a related column between them, enabling the combination of data from different sources.

What does the term "test execution" refer to in database testing?

  • Creating test cases
  • Designing database schema
  • Executing test scripts
  • Running SQL queries
In database testing, "test execution" refers to the process of running test scripts against the database. These scripts contain instructions to perform various actions such as inserting, updating, deleting data, and validating results. Test execution helps in evaluating the database's functionality and performance under different scenarios.

Which challenge in database testing relates to ensuring data accuracy and consistency?

  • Data migration issues
  • Data validation
  • Database schema changes
  • Performance bottlenecks
Ensuring data accuracy and consistency is crucial in database testing. Data validation is the challenge that directly addresses this concern by verifying that the data stored in the database conforms to predefined rules and standards, thus maintaining data integrity and reliability.

____________ testing is a technique used to simulate real-world scenarios and ensure the database can handle peak loads.

  • Functional
  • Integration
  • Load
  • Unit
Load testing involves subjecting the database to simulated high volumes of concurrent users or transactions to evaluate its performance under stress. By simulating peak loads, load testing helps identify performance bottlenecks and ensures the database can handle heavy workloads effectively.

You are testing a mission-critical database for a financial institution. During the test, you observe that the database response time significantly increases as the number of concurrent users grows. Which type of testing should you perform to address this issue?

  • Load Testing
  • Performance Testing
  • Scalability Testing
  • Stress Testing
Performance Testing