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Database Testing Interview Questions and Answers for Fresher and Experienced



Database Testing Interview Questions and Answers for Fresher and Experienced

If you want to grab a job for a database testing profile then this blog post will surely help you. Every database testing has a different meaning, so its scope and job profile is also different. Here, we are going to provide you with a list of database testing interview questions that will help you in grasping the job quickly and provide success in the interview. The blog will cover all of the possible database testing interview questions for the post or profile of database testing.

Here, we have divided the questions into two sections, one is for fresher and the other is for experienced candidates. These backend testing interview questions will help you in getting familiar with which type of questions are frequently asked by interviewers and help you in getting your dream job.

Database Interview Questions:

Are you a fresher in Database testing? Then these are the database interview questions for you: 

1). Define database testing

2). What are the different types of testing?

3). Explain the structural database testing?

4). Explain the Schema Testing?

5). Explain the Table Testing?

6). Explain Functional or Procedural Testing?

7). Explain the Trigger Testing?

8). Explain the Database Server Testing?

9). Define the database indexing in brief?

10). Enlist the different types of indexes.

A. Database Testing Questions & Answers for Fresher

1). Define Database Testing

Answer to Database Interview Questions

Database testing is the process to check all triggers, schema, functions, and procedures. Moreover, it is linked with testing of data consistency and integrity.

2). Enlist the Different Types of Testing.

Answer to Database Interview Questions

Mainly testing is the following types:

Different Types of Testing

  • Structural Testing: It involves validation of all elements and objects that are primarily used for data storage and are not exposed to the end-users. Database server validation is also a severe part and configuration of database testing.
  • Non-Functional Database Testing: Multiple testing is involved in multiple categories like security testing, stress testing, compatibility testing, load testing, and usability testing. All of these types of testing are known as performance or non-functional testing.
  • Functional Testing: This testing involves requirement specifications that are required for user transactions. In this testing required input and output is column length, handling of null values, and column data type. Here the tables, columns, and derived output tables must be available. Here the database fields must follow the standard naming convention as per business requirements.

3). Explain the Structural Database Testing?

Answer to Database Interview Questions

When a database structure is tested that involves tables, schema, function, database server, and triggers, then it is called testing of the database structure.

4). Explain the Schema Testing?

Answer to Database Interview Questions

The schema testing is being done in this way so that the name of frontend and backend schemas should be matched. The checkpoints involved in this testing are the validation of schema format, as sometimes the requirement of schema structure may differ from the requirement of the business process and the front-end application structure. Here, unmapped tables, columns, and views are also verified.

5). Explain the Table Testing?

Answer to Database Interview Questions

Table testing involves the testing of table and column names. Here front-end columns are mapped, while back-end names may remain the same. Data type and size of the column must remain the same and as per the business requirement and should be mapped to the front-end application. Here, in this testing, constraint testing is also required that may include testing of the foreign key, primary key, and other conditions related to table or data. In table testing, cluster or non-cluster table indexing is also being tested.

Read: Penetration Testing Tutorial Guide for Beginners

6). Explain Functional or Procedural Testing?

Answer to Database Interview Questions

Below-listed things and steps are involved in the procedure or Function Testing:

  • It is being checked whether the development team has followed complete coding standards or not. It involves proper coding indentation and coding standards. Naming conventions are checked for the variables and unnecessary variables and comments are removed that are provided by the developers.
  • It is being checked whether the code has been developed as per business requirements or not.
  • Moreover, it is being checked whether the code can handle all exceptions or not that may include testing and handling of null value handle exceptions or arithmetic exceptions.
  • It is also checked whether the data has been inserted through functions and procedures into tables properly or not, which may include data type, name, and length of the data field.

7). Explain the Trigger Testing?

Answer to Database Interview Questions

For this testing, rules are the same for the procedure and function testing. Here it has been checked whether the trigger is being executed as per specific event requirement or on the occurrence of a particular event or not.

8). Explain the Database Server Testing?

Answer to Database Interview Questions

Here database server configuration is being checked. Execution processing capacity, storage capacity, and RAM should be as per user requirements.

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9). Define the Database Indexing in Brief?

Answer to Database Interview Questions

The index is created in the table column that may perform query execution faster and even it can be executed frequently as well.

10). Enlist the Different Types of Indexes.

Indexes are of following types:

Different Types of Indexes

Read: Phases Of SDLC? Software Development Life Cycle Models You Need to Know

Let us have a look at some More Backend Testing Interview Questions:

Are you an experienced professional in Database? Then here are some Database interview questions for you:

11). Enlist the steps involved in the data loading test of database testing.

12). Which of the SQL commands can be used to manipulate tables or data?

13). How can stress testing be performed?

14). How can the database be tested manually?

15). How many clustered indexes can be created on a single table?

16). How can a user check whether the expected number of database objects be created or not?

17). Why is database testing performed?

18). Enlist the steps that are included in the database testing.

19). What are various types of SQL statements?

B. Database Testing Questions & Answers for Experienced

11). Enlist the Steps Involved in the Data loading Test of Database Testing.

Answer to Database Interview Questions and Answers for Experienced:

Database testing process of data loading involves the following steps:

  • Here the source data must be known
  • Target data must be known
  • Source and target data must be compatible
  • Source and target columns must be checked
  • The effective number of rows from source and target must be known
  • Garbage values must be checked
  • The change effect must be known after any change being done in the source.

12). Which of the SQL commands can be used to manipulate tables or data?

Answer to Database Interview Questions and Answers for Experienced:

We can use insert, select, delete, update or create table commands including alter table and drop table commands to manipulate the table or data.

13). How can Stress Testing be Performed?

Answer to Database Interview Questions and Answers for Experienced:

Here, a large amount of data is being tested for load in minimum time. The system response is being tested, when load testing is being done. In case if the load exceeds the user process, then it is known as load or stress testing. The testing examples may include multiple application execution on a single computer or downloading datasets.

14). How can the database be tested manually?

Answer to Database Interview Questions and Answers for Experienced:

If the user tests data from the backend side, at the time when new data has been added, deleted or updated from the front end side.

15). How many clustered indexes can be created on a single table?

Answer to Database Interview Questions and Answers for Experienced:

Only one clustered index can be created on a single table.

16). How can a user check whether the expected number of database objects be created or not?

Answer to DB testing interview questions:

Users can check the number of database objects, that have been created in two ways that are listed below:

  • Object Explorer can be used to check whether database objects like tables, procedures, schema, trigger, function or index have been created or not.
  • Through the master or sys table, you can also check the object status that stores all metadata of database objects.

17). Why is database testing performed?

Answer to DB Testing Interview Questions:

Database testing is performed for a number of reasons. As many times it may require testing data integrity, consistency and validation because the backend system is responsible to access and store the data for a variety of reasons. A few of such reasons are listed below:

  • The stored procedures and views may contain certain critical tasks like payment info or to check the customer information, these critical tasks are required to be checked.
  • Front-end black box testing is important but cannot isolate the problem. Backend testing may increase data robustness and that is why testing is performed on the back-end system.
  • When data comes into the database from multiple sources then it is possible that any incorrect or harmful data may be collected, so users must check the database regularly. Moreover, you should also check data consistency and integrity regularly.

18). Enlist the Steps that are Included in the Database Testing.

Answer to DB Testing Interview Questions:

Below-listed steps are included in the Database Testing:

Read: How to Improve Test Case Writing Skills?

  • The first step is data verification, it must be verified
  • Verify constraints that is whether they are maintained or not
  • Trigger performance and procedure performance is also checked
  • Transaction rollback and commit must also be checked

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19). What are various types of SQL statements?

Answer to DB Testing Interview Questions:

SQL or structured query language has the following types of statements:

Types of SQL Statements

20). How are database test cases being written?

Answer to DB Testing Interview Questions:

After getting functional requirements, the user must understand table structure, Joins, Cursors, Stored procedure, parameters, and triggers. Then you can write a test case along with different values as the inputs to these objects.

Final Words on Database Interview Questions:

In this way, you can get the database testing done in just a few steps and then you can apply for various profiles of database testing. As per the job profile and requirement, you can apply for the job and for that just prepare for the exam. In fact, you can also read many other questions for the interview and get ready for that. There are plenty of resources that can be helpful.

The profile may also require some knowledge of SQL programming and therefore it may be good for you if you will have some information about the profile and concepts. Here, we have listed some of the questions, but they are not limited. There can be many other ones.

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Comments

  • M

    Maximiliano Jackson

    Do you share any posts on how to boost confidence before going for an interview?I really need it.

     Reply
    • JanbaskTraining

      Glad you found this useful! For more such insights on your favourite topics, do check out JanBask Training Blogs and keep learning with us!

  • L

    Louis Anderson

    Highly recommended blog! The questionnaire includes all the sections of the course. Hence worth reading!

     Reply
    • JanbaskTraining

      Hello, JanBask Training offers online training to nurture your skills and make you ready for an amazing career run. Please write to us in detail at [email protected] Thanks!

  • H

    Holden White

    Overall a nice learning experience via the article. I really enjoyed solving and reading the questions.

     Reply
    • JanbaskTraining

      Glad you found this useful! For more such insights on your favourite topics, do check out JanBask Training Blogs and keep learning with us!

  • P

    Paul Wilson

    Hi, I want to join a Backend Testing course at your institute. How can I do that, I mean what’s the process for that?

     Reply
    • JanbaskTraining

      Hello, JanBask Training offers online training to nurture your skills and make you ready for an amazing career run. Please write to us in detail at [email protected] Thanks!

  • L

    Louis Anderson

    Highly recommended blog! The questionnaire includes all the sections of the course. Hence worth reading.

     Reply
    • JanbaskTraining

      Thank you so much for your comment, we appreciate your time. Keep coming back for more such informative insights. Cheers :)

  • A

    Aidan Johnson

    I was so scared about my backend testing interview but not now, all thanks to this guide.

     Reply
    • JanbaskTraining

      Hi, Thank you for reaching out to us with your query. Drop us your email id here and we will get back to you shortly!

  • H

    Holden White

    Do you share any posts on how to boost confidence before going for an interview?I really need it.

     Reply
    • JanbaskTraining

      Thank you so much for your comment, we appreciate your time. Keep coming back for more such informative insights. Cheers :)

  • P

    Paxton Harris

    This type of post is really helpful for interview candidates. Good job!

     Reply
    • JanbaskTraining

      Hello, JanBask Training offers online training to nurture your skills and make you ready for an amazing career run. Please write to us in detail at [email protected] Thanks!

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