Introduction
Preparing for a Database testing interview can be challenging, but it becomes easier to do so with the correct answers. This article consists of the most common Database testing interview questions and sample answers to help you raise the chances of getting the position you are applying for.
Most Database testing questions focus more on what database testing is and how it works. In addition, some questions try to bring in a bit of yourself to help the interviewer understand you in a better way. So, knowing how to answer the question with confidence is key to acing your interview.
What Is Data Testing?
Database testing is software that, among other things, tests tables, schema, and triggers. It includes making various complex queries to stress test the system and decide if the result is positive or negative.
Database testers collaborate with application developers to thoroughly evaluate the database’s scenarios. Therefore, besides being knowledgeable about the database structure, a database tester should have a thorough understanding of the application’s business rules.
Database Testing Interview Questions And Answers
In database testing, what should we verify regularly?
In most cases, we verify the following in DB Testing:
- Check for constraints
- The size of a field is validated.
- The procedure that has been saved
- For performance-related concerns, matching application field sizes to database indexes is necessary.
What exactly is a data-driven test?
Multiple numbers of data are tested using a data-driven test in a data table. It may simply change the parameters from various locations at the same time utilizing this method.
What processes does a tester use while testing stored routines?
The tester will verify that the stored procedures are standard and that the fields, such as updates, indexes, deletions, and joins, are valid as specified in the process.
How would you determine whether or not a trigger has been fired during database testing?
You may find out whether or not a trigger has been fired by accessing the standard audit log. The triggers that were fired may be seen in the audit log.
How can you test a SQL Query in QTP without utilizing Database Checkpoints?
We may connect to the database and test the queries and database by developing scripting procedures in VBScript.
Can you show me how to utilize SQL queries in QTP?
Select the SQL manual queries option in QTP when utilizing the output database checkpoint and database check. Next, enter the “select” queries to fetch the data in the database after selecting the manual queries option, and then compare the predicted and actual results.
What is the best approach to writing database testing test cases?
It’s similar to functional testing to write test cases. You must first understand the application’s operational requirements. After that, you must decide on the parameters for developing test cases, such as
- Objective: Make a list of the goals you want to test.
- Method of input: Write the action or input method you wish to use.
- How it should look in the database as expected.
How do you create test cases from requirements, and do the conditions represent the AUT’s (Application Under Test) specific functionality?
To develop test cases from requirements, you must first perform a comprehensive analysis of the provisions in terms of functionality. After that, you consider relevant test case design approaches for constructing the test cases, such as equivalence partitioning, black box design, cause-effect graphing, and so on. So, yes, the criteria reflect the AUT’s specific functionality.
What exactly is DML?
DML (Data Manipulation Language) is a computer language for manipulating data with schema objects. It’s a subset of SQL.
What are DCL commands, and how do I use them? What are the two kinds of commands that DCL uses?
Data Control Language (DCL) is a programming language that is used to control data.
The following are the two types of DCL commands:
- Grant: This command grants the user database access privileges.
- Revoke: This command prevents the user from accessing the database.
What is the difference between white box and black box testing?
Black box testing refers to evaluating the software’s outputs in response to specific inputs. This sort of testing is usually done to see if the application meets the user’s requirements. There is no expectation that this test will yield a specific functional outcome.
White box testing ensures that the code and logic of the software are valid—only a programmer who is familiar with white box testing and has tested it before as well.
What criteria does QTP use to assess test results?
After the testing, QTP will provide a report. The checkpoints, errors, and system messages that were discovered during testing will be displayed in this report. In addition, in the test results box, any mismatches found at the checkpoints will be shown.
What is load testing, and how does it work?
Load testing is used to determine the system’s responsiveness. Stress testing occurs when the load surpasses the user’s pattern. Downloading a considerable number of files, running several apps on a single computer, bombarding a server with an enormous number of e-mails, and assigning many tasks to a printer one by one are all examples of load testing.
How can you tell if the trigger has been fired and if it can be triggered on demand?
To see if the trigger has been triggered, run a query against the typical audit log. It will show the motivation of the data table.
Triggers cannot be called on demand; instead, they are called when a table shows an action (INSERT, DELETE, or UPDATE) defined for that table.
What is the best way to test Stored Procedures?
- To test Stored Procedures, the test engineer must first grasp the need and purpose of each Stored Procedure.
- Next, make sure that all of the indexes, joins, updates, and deletions are accurate compared to the tables stated in the Stored Procedure and that the Stored Procedure is formatted in a standard manner, such as comments updated by, and so on.
- Verify the procedure calling parameters, name, and expected replies for various sets of input parameters.
- Run the operation manually using database client applications such as TOAD, MySQL, or Query Analyzer.
- Re-run the operation with varied settings to compare outcomes to expected values.
- Finally, use QTP to automate the tests.
What exactly is an index, and what are the many sorts of indexes?
An index is a database object generated on a table column to discover data quickly and effectively (or speed up searches/queries).
They can find indexes in the following forms:
- Index of the B-Tree
- Index of bitmaps
- A clustered index
- Index of topics covered
- An index that isn’t unique
- A unique index
What exactly do you mean by database management system (DBMS)?
A database is a logically ordered collection of data. A database management system (DBMS) is a computer program that establishes a communication network between users, the database, and other programs to store, change and extract data from it.
Is a demand like “a rapid database retrieval rate” testable?
No. I don’t believe so, as the requirement looks to be ambiguous. The SRS should expressly state the performance or transaction requirements, such as “database retrieval rate of 5 microseconds.”
What are the requirements for developing excellent test cases in database testing?
Before developing database test cases, you’ll need to know the following things.
- For generating that need, look at other entities that have been utilized in an application, such as back-end database tables, cursors (if any), joins between tables, triggers (if any), input parameters, stored procedures (if any), and output parameters.
- After you’ve gathered all relevant information, create a test case with various input values to examine all resources.
The process of performance testing and the bottlenecks
Performance testing is software that focuses on seeing how a system works in different aspects. Sensitivity, speed, and stability are the three aspects that performance testing focuses on when provided with a heavy workload. This testing necessitates the use of costly equipment as well as highly-trained and experienced experts.
Bottom Line
Given above was a list of the most common Database testing interview questions along with sample answers. It isn’t necessary to memorize word-for-word while thoroughly preparing for an interview. Instead, go through the answers and rephrase them according to you, so you sound more natural when you speak.
FAQs
What do database skills entail?
Database skills are the talents and knowledge needed to do database-related tasks, including database development and management. Skills linked to a specific element of databases, such as database architecture or security, are also possible.
On a CV, how can I describe my SQL skills?
Developing SQL queries to study, analyze, and debug data, generate business reports, and work with the development team to identify and solve software problems and inadequacies are skills connected with SQL Analysts commonly seen on sample resumes.
What is an example of a database?
Desktop database tools such as Microsoft Excel or Microsoft Access are ideal examples.
