Updated May 12, 2023
Introduction to SDET Interview Questions and Answers
The following article provides an outline for SDET Interview Questions. SDET, Software Design Engineer in Test or Software Development Engineer in Test, stands for mainly testing performed on a software product. It needed some candidates who can able to develop and as well as perform testing. Microsoft initially started this, but currently, other organizations are very conscious of the same, and they are looking for someone who is an expert in SDET for involving in the full development of their product as well as involving with the testing design, which needs to be performed for that individual development. The organization can introduce the same resource in two key tasks that will always be profitable.
If you are looking for a job related to SDET, you must prepare for the 2023 SDET Interview Questions. Every interview is indeed different as per the various job profiles. Here, we have prepared the important SDET Interview Questions and Answers to help you succeed in your interview. This 2023 SDET Interview Questions article will present the ten most important and frequently asked SDET interview questions.
These interview questions are divided into two parts as follows:
Part 1 – SDET Interview Questions (Basic)
This first part covers basic Interview Questions and Answers.
1. Explain differences in detail between software development engineering in test (SDET) and testing software manually?
Answer:
SDET is mainly using doe automation testing. This means developing a product that can be tested automatically without manual intervention. Whereas manual testing does not at all meet these criteria.
2. Write a program to reverse a number in any language?
Answer:
public class reverseNumber {
public long reverse(long num)
{
long temp=0;
while(num!=0)
{
temp=(temp*10)+(num%10);
num=num/10;
}
return temp;
}
public static void main(String args[])
{
long n= 654312;
reverseNumber inp = new reverseNumber();
System.out.println(“Given number is “+ n);
System.out.println(“Reverse of given number is “+inp.reverse(n));
}
}3. Explain how we can define ad-hoc testing in the current IT industry?
Answer:
Ad hoc testing is one of the testings very much famous in the IT industry. This kind of testing is mainly unplanned and without documentation. It usually needs to perform when some ad hoc requirements come from the client; the developer has to develop in the same priority manner. Now tester needs to test it immediately and develop proper deliverables in a minimal period. Documentation or planning is not always possible, but some organizations maintain specific tools for tracking this task, especially for additional billing.
4. Two big keywords normally benefit the tester, one is the priority, and another is severity; explain the difference between them in detail.
Answer:
Priority and severity are essential keywords in the IT industry, especially for those involved in the production support activity of their provided product or any client’s existing system. Currently, all the big organizations try to follow one specific tool where one helpdesk team has been assigned for handling. Typically, end-users reach that corresponding helpdesk team to raise their concerns, or end-users can create their concerns directly in that specific tool.
Some helpdesk person first analyzes the same, then gives the priority based on the end-user impact. A Helpdesk person, tester, developer, and some point-of-time business analyst are involved with that issue and try to understand the exact impact of that specific issue based on that they have given the severity of that issue. So priority defines how important that issue is, and severity is defined as the impact or destruction ability.
5. Explain a detailed explanation of the job responsibility of a tester or Software Development Engineering in a test role?
Answer:
These are the common SDET Interview Questions asked in an interview. Several responsibilities normally need to follow by an SDET tester in the current IT industry.
- Write automation of testing and set up the same for varieties platforms like web or mobile.
- Managing and handling bug reports.
- Maintaining the proper communication channel between the developer and the client.
- Preparing and delivering test cases.
6. What is ad-hoc testing?
Answer:
Ad-hoc testing is defined as the testing done on an ad-hoc basis without any reference and proper inputs to the test case and without any plan, test cases, and documentation. This type of testing’s main objective is to find defects and break the application by executing different application flows or random functionality.
Ad-hoc testing is an informal way of finding bugs in an application and can be performed by anyone on the team. It will be difficult to find bugs without test cases, but sometimes during ad-hoc testing, bugs will find that we didn’t find through normal testing or existing test cases.
7. Give some examples regarding the typical experiences or excessive load working day of a tester or software development engineer in test (SDET) resources?
Answer:
Three key tasks are always taken a huge amount of time for the tester on any day:
- Understanding the requirements of the project.
- Preparing and executing required test cases based on the client’s expected functionalities.
- Reporting the bugs identified on individual functionality developed for the client to the developer and retesting the same after redelivery by the developer to ensure expected functionality is properly delivered without any common bug.
Part 2 – SDET Interview Questions (Advanced)
Let us now have a look at the advanced Interview Questions and Answers.
8. Explain some expert comments on how one tester can decide that provided products are ready to move in the live environment?
Answer:
This is one critical decision, so a single person or junior guy has never taken it. Only the developer and tester are not involved in bringing this decision; higher management is periodically involved in that. Management test mainly ensure by validating below to ensure product delivery are bugless:
- Validating bug reports provided by the tester. How was the bug resolved, and retesting done by the tester or not?
- Validating all the test cases written by the tester for that specific functionality, documentation, and confirmation taken from the tester on the same.
- Run automated test cases to ensure new functionalities do not break existing functionality.
- Sometimes validating test coverage report ensures all the developing component has been covered by test cases written.
9. Write a program to swap two numbers without using any temp variable?
Answers:
The program to swap two numbers without using any temp variable is as below:
public class swap{
public static void main (String args[])
{
int x = 20;
int y =30;
System.out.println(“Numbers before swapping”);
System.out.println(“ number x is “ + x);
System.out.println(“number y is “ +y);
// Swapping numbers
x= x+y;
y=x-y;
x=x-y;
System.out.println(“Numbers after swapping”);
System.out.println(“ number x is “ + x);
System.out.println(“number y is “ +y);
}
}10. If someone needs one specific format of bug reports from a tester, then what will be the best way or approach can take by the tester to provide the same?
Answer:
One bug report normally contains below:
- Bug Summary
- Reproduce steps
- Expected behavior and current behavior of one specific bug
11. Explain in detail about different kinds of testing called Alpha and Beta?
Answer:
The tester does alpha testing identified bugs before moving the product to a live environment or the end-user. The determination of beta bugs typically falls to the end-user, who represents the actual user or application of the product.
12. What is Risk-Based testing?
Answer:
Risk-Based testing refers to testing the functionalities of a product by prioritizing them according to the importance of the deliverables. Risk-Based testing includes testing crucial product features that will have a business impact, and the probability of the failure of those features is very high. Based on the business requirement, we prioritize product functionalities and test them in the order of high-priority, followed by medium and low-priority functionalities. Risk-based testing will be performed when there is insufficient time to test all the product’s functionalities.
13. Normally, there are different categories available to make one specific group by of varieties test cases; give an explanation of them.
Answer:
Some famous test cases in the current IT industry are below:
- Functional Testing
- Frontend or User interface testing
- Performance Testing
- Integration Testing
- Load testing or User usability testing
- Security Testing
14. Common challenge one software tester commonly faces is proper documentation not maintained for testing. In that case, how can we overcome the same?
Answer:
One common scenario involves inadequate availability of documentation for all types of test cases. However, fulfilling the requirement and delivering it to the client on time remains necessary. In such cases, testers typically follow client-provided emails that accurately describe all the requirements. In an ideal scenario, the emails would contain screenshots of the application, clearly indicating the specific areas that require changes. Alternatively, testers may engage in Monday meetings or conduct verbal discussions with the client to grasp the exact functionality required for the changes fully. This approach allows for efficient testing and timely delivery within the expected timeline.
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