20 Boundary Value Analysis Interview Questions and Answers

Boundary Value Analysis (BVA) is a testing technique that is used to identify errors at the boundary of an input domain. This technique is often used in conjunction with other testing techniques, such as equivalence partitioning. When interviewing for a position that requires knowledge of BVA, it is important to be prepared to answer questions about the technique. In this article, we discuss some common BVA interview questions and how to answer them.

Boundary Value Analysis Interview Questions and Answers

Here are 20 commonly asked Boundary Value Analysis interview questions and answers to prepare you for your interview:

1. Can you explain what a boundary value is?

A boundary value is a value that lies at the edge of a range of valid values. For example, if you are testing a function that accepts input values between 1 and 10, then the boundary values would be 1 and 10. Testing with boundary values can help to uncover errors that might occur when the input values are at the extremes of the range.

2. What do you understand by the term Boundary Value Analysis?

Boundary Value Analysis is a method used in testing software to identify errors at the boundary of an input domain. This means testing input values that are just outside the range of valid input values. This can help to identify errors that might not be found using other methods of testing.

3. How does Boundary Value Analysis differ from Equivalence Partitioning?

Boundary Value Analysis is a test design technique that involves testing the input values at the extremes of the input domain, while Equivalence Partitioning involves testing values that are representative of the input domain as a whole. Boundary Value Analysis is more likely to uncover errors that occur at the boundary conditions of the input domain, while Equivalence Partitioning is more likely to uncover errors that occur within the input domain.

4. What are the advantages of using Boundary Value Analysis over Equivalence Partitioning?

Boundary Value Analysis is a more thorough testing method than Equivalence Partitioning because it tests not only for valid and invalid input, but also for input that is on the boundary between being valid and invalid. This means that Boundary Value Analysis is more likely to uncover errors in the software being tested.

5. How can you use Boundary Value Analysis to test a program that accepts employee ID as an input?

You can use Boundary Value Analysis to test a program that accepts employee ID as an input by testing the program with both valid and invalid employee IDs. A valid employee ID would be within the range of IDs that the program is expecting, while an invalid employee ID would be outside of that range. This can help to ensure that the program is able to correctly handle both valid and invalid input.

6. What are the main steps involved in performing Boundary Value Analysis?

The main steps involved in performing Boundary Value Analysis are:

1. Identify the boundary values for the input data.
2. Test the system with the boundary values.
3. Identify any errors that occur.
4. Correct the errors and retest the system.

7. How would you perform Boundary Value Analysis on a set of data containing positive and negative values?

You would need to consider both the upper and lower bounds of the data set when performing Boundary Value Analysis. This means testing for values at the extremes of the data set, as well as values just inside and just outside of the boundaries. For a set of data containing positive and negative values, this would mean testing for values at 0 (the boundary between positive and negative values), as well as the highest and lowest values in the data set.

8. What are some common errors that result when using incorrect or invalid boundary values?

There are a few different types of errors that can occur when using incorrect boundary values. The first is that the program may not function correctly, and produce incorrect results. The second is that the program may crash, or produce an error message. Finally, the program may simply not work at all.

9. What do you know about the relationship between equivalence partitioning and boundary value analysis?

Equivalence partitioning is a method of testing in which inputs are divided into groups that are expected to produce the same output. Boundary value analysis is a method of testing in which inputs are chosen that are at the extremes of the equivalence partitions. Both methods are used to ensure that a system is functioning correctly.

10. Why do you think it’s important to have multiple test cases for testing boundaries?

It’s important to have multiple test cases for testing boundaries because it helps to ensure that the software is functioning correctly at all points along the boundary. If there is only one test case, then it’s possible that the software could pass that test case but still have issues at other points along the boundary. By having multiple test cases, you can be more confident that the software is functioning correctly at all points.

11. When performing Boundary Value Analysis, should we also include regular/normal input conditions in our test suite? If so, why?

Yes, you should also include regular/normal input conditions in your test suite when performing Boundary Value Analysis. The reason for this is because Boundary Value Analysis is only concerned with testing the extreme values (boundaries) of your input data. However, by also including regular/normal input conditions in your test suite, you will be able to get a more complete picture of how your system behaves under different types of input.

12. Is it possible to automate Boundary Value Analysis? If yes, then how?

Yes, it is possible to automate Boundary Value Analysis. This can be done through the use of a tool that can generate test cases based on the specifications of the software under test. This can be a very effective way to ensure that all boundary values are tested, as it can be difficult to manually create test cases that cover all potential values.

13. Are there any limitations to Boundary Value Analysis? If yes, then what are they?

There are a few potential limitations to Boundary Value Analysis. First, it can be difficult to identify all of the potential boundary values for a given test case. Second, if the test data is not evenly distributed across the boundary values, then some values may be tested more than others. Finally, Boundary Value Analysis can be time-consuming to implement, especially if there are a large number of boundary values to consider.

14. Which one do you prefer: Equivalence Class Testing or Boundary Value Analysis? Why?

I prefer Boundary Value Analysis because it is a more targeted approach that allows you to find errors at the edges of the input data. With Equivalence Class Testing, you are testing a larger range of data, which can sometimes lead to more false positives.

15. How can you improve your chances of detecting bugs with Boundary Value Analysis?

One way to improve your chances of detecting bugs with Boundary Value Analysis is to increase the number of test cases. Another way to improve your chances is to use a tool that can automatically generate test cases for you.

16. In context of software development, what do you understand by “edge” and “corner”?

In software development, the term “edge” refers to a boundary between two different code blocks or functionalities. A “corner” is a point where three or more edges meet.

17. Can you give me some examples of edge cases?

Some examples of edge cases that come to mind are trying to divide by zero, or taking the square root of a negative number. These are both cases where the inputs are right on the edge of what is considered valid, and so they can be tricky to handle.

18. What do you understand by “slices” in the context of data structures?

In the context of data structures, “slices” refers to the act of taking a subset of data from a larger data set. This can be useful when you only need to work with a small portion of the data, or if you want to break the data up into manageable chunks.

19. What types of issues can be found through static code analysis?

Static code analysis can be used to find a variety of issues in software code, including coding errors, bugs, and security vulnerabilities. Static code analysis tools can also be used to enforce coding standards and best practices, and to perform automated code reviews.

20. How can you find the number of iterations required to run a while loop?

The number of iterations required to run a while loop can be found by using the boundary value analysis technique. This technique involves looking at the extreme values that can be input into the loop, and then determining how many times the loop will need to run in order to reach those values. By doing this, you can determine the minimum and maximum number of iterations that the loop will need to run, and then you can choose a value somewhere in between those two extremes.