900+ Softwaretest Engineer Interview Questions and Answers

Boundary value analysis is a testing technique to identify errors at the boundaries of input values.

• For User ID field, test with values just below the minimum limit, at the minimum limit, just above the maximum limit, and at the maximum limit

• For Password field, test with values just below the minimum limit, at the minimum limit, just above the maximum limit, and at the maximum limit

• Ensure that the system handles these boundary values correctly and does not allow invalid input...read more

Approach to handle a blocker defect just before release and convincing the developer to fix it.

• Assess the impact of the defect on the release and prioritize it accordingly

• Provide clear and concise information about the defect to the developer

• Explain the potential risks and consequences of not fixing the defect

• Collaborate with the developer to find a solution and provide support if needed

• Highlight the importance of meeting the release date and the impact of the defect on the p...read more

Answering questions related to software testing, algorithms, and object-oriented programming concepts.

• To print the frequency of each alphabet in a string, create a hashmap to store the count of each alphabet.

• To swap two numbers using constant space, use XOR operation: a = a ^ b, b = a ^ b, a = a ^ b.

• Abstraction is hiding the implementation details and showing only the necessary features. Encapsulation is bundling data and methods into a single unit. Polymorphism allows object...read more

SQL query to display the total number of students whose names start with 'A' from the child details table.

• Use the SELECT statement to retrieve data from the table.

• Use the COUNT function to count the number of rows that meet the condition.

• Use the LIKE operator with the pattern 'A%' to match names starting with 'A'.

Determine the fares for cities B and C based on given ticket costs from city A.

• Let the fare from A to B be x and from A to C be y.

• From the first equation: 2x + 3y = 77.

• From the second equation: 3x + 2y = 73.

• Solve these equations simultaneously to find x and y.

• Substituting values gives x = 17 and y = 13.

The mode of testing is decided based on project requirements, risks, and available resources.

• Analyze project requirements to determine the appropriate mode of testing

• Assess the risks associated with the project and allocate testing mode accordingly

• Consider available resources such as time, budget, and personnel

• Choose the mode of testing that provides the most comprehensive coverage

• Examples of testing modes include manual, automated, exploratory, regression, and performance te...read more

Manual testing is the process of manually testing software for defects. It has advantages and disadvantages.

• Manual testing involves executing test cases manually without the use of automation tools.

• Advantages of manual testing include human intuition, flexibility, and cost-effectiveness for small projects.

• Disadvantages include time-consuming nature, lack of repeatability, and limited coverage.

• A bug is a coding error that causes a program to behave unexpectedly, while a defect...read more

The y c malloc function returns memory from the heap while y stack operates in reverse.

• The y c malloc function is used to allocate memory dynamically from the heap.

• The y stack operates in reverse, meaning the last item pushed onto the stack is the first item popped off.

• This can cause issues if the programmer is not careful with memory allocation and stack usage.

API testing is a type of software testing that involves testing APIs directly and verifying their functionality, reliability, performance, and security.

• API testing involves testing the communication between different software systems

• It verifies the functionality, reliability, performance, and security of APIs

• API testing can be performed using tools like Postman, SoapUI, and JMeter

• API testing can be automated using scripting languages like JavaScript and Python

Answers to common questions asked in a Software Test Engineer interview

• Software testing is necessary to ensure the quality, reliability, and performance of software applications

• Regression testing is re-testing of a software application to ensure that new code changes have not adversely affected existing functionality

• RTM (Requirement Traceability Matrix) is used to trace requirements throughout the software development and testing process

• The owner of a rejected bug is typicall...read more

I will report the defect to the project manager and the development team.

• Report the defect immediately

• Provide detailed information about the defect

• Collaborate with the development team to resolve the issue

I will follow a systematic approach to resolve the bug.

• First, I will try to reproduce the bug to understand the issue.

• Then, I will analyze the root cause of the bug.

• Next, I will prioritize the bug based on its severity and impact.

• After that, I will create a bug report with all the necessary details.

• Finally, I will work with the development team to fix the bug and verify the fix.

• If the bug cannot be resolved immediately, I will communicate the status to the stakeholders.

Key modules to test in a login-based app include authentication, user interface, security, and error handling.

• Authentication: Verify correct username/password combinations (e.g., valid vs. invalid logins).

• User Interface: Check for responsive design and accessibility (e.g., layout on different devices).

• Security: Test for vulnerabilities like SQL injection and password encryption.

• Error Handling: Ensure appropriate error messages are displayed for failed logins (e.g., 'Incorrect...read more

Class is a blueprint for creating objects. Objects are instances of a class. 2nd maximum can be found by sorting array and returning the second last element. Stack data structure is used in browser history, undo-redo operations, etc.

• Class is a template for creating objects with similar properties and methods

• Objects are instances of a class that can have unique values for their properties

• To get 2nd maximum from an array, sort it in descending order and return the second elemen...read more

Constraints faced in Data Validation with illustrations

• 1. Format constraints: Ensuring data follows a specific format (e.g. date in MM/DD/YYYY format)

• 2. Range constraints: Validating data falls within a specified range (e.g. age between 18-65)

• 3. Mandatory constraints: Ensuring required fields are not empty (e.g. email address field)

• 4. Consistency constraints: Checking data consistency across multiple fields (e.g. start date before end date)

• 5. Uniqueness constraints: Verifying...read more

Iterate through array and check if element is greater than its adjacent elements

• Iterate through array and check if current element is greater than element at index-1 and index+1

• Return the first element found that satisfies the condition

• Handle edge cases where element is at the beginning or end of array

Performance testing is the process of evaluating the speed, responsiveness, stability, and scalability of a software application.

• Types of performance testing include load testing, stress testing, endurance testing, and spike testing.

• Load testing checks the application's performance under normal and peak loads.

• Stress testing evaluates the application's performance under extreme conditions.

• Endurance testing checks the application's performance over a prolonged period of time.

• Sp...read more

I have 3 years of experience with Angular. Pipes are used for data transformation and components are building blocks of Angular applications.

• I have worked on Angular projects for 3 years, developing and testing various features.

• Pipes in Angular are used for transforming data before displaying it in the UI. For example, date pipe formats dates in a specific way.

• Components in Angular are reusable building blocks that encapsulate HTML, CSS, and TypeScript logic. They help in cre...read more

To count the Google pages shown on search result, you can look at the page numbers at the bottom of the search results.

• Scroll to the bottom of the search results page to see the page numbers.

• Each page number represents a different page of search results.

• Count the total number of page numbers to determine the total number of Google pages shown.

SQL query to find the highest salary from a specific department

• Use the MAX() function to find the highest salary

• Filter the results based on the specific department using WHERE clause

• Join the employee table with the department table if necessary

HTML is a markup language for creating web pages, CSS is used for styling, OOP is a programming paradigm, front end and back end development refer to different aspects of web development.

• HTML (Hypertext Markup Language) is used to create the structure of web pages.

• CSS (Cascading Style Sheets) is used to style the HTML elements.

• OOP (Object-Oriented Programming) is a programming paradigm that uses objects and classes.

• Front end development focuses on the user interface and user ...read more

Data verification and validation ensure accuracy and integrity in databases through systematic processes and scripts.

• Define data requirements: Establish what data is needed for the application, e.g., patient records in a healthcare app.

• Create validation scripts: Use SQL queries to check for data integrity, e.g., ensuring no duplicate patient IDs exist.

• Implement verification processes: Run automated tests to compare database entries against expected results, e.g., verifying th...read more

Static variables and methods belong to the class rather than the instance of the class.

• Static variables are declared with the 'static' keyword and are shared among all instances of the class.

• Static methods are also declared with the 'static' keyword and can be called without creating an instance of the class.

• Static methods cannot access non-static variables or methods of the class.

• Example: 'public static int count;' declares a static variable 'count' that can be accessed by a...read more

AVL tree is a self-balancing binary search tree where the heights of the two child subtrees of any node differ by at most one.

• AVL trees are commonly used in database systems for indexing and searching.

• They are also used in compilers for optimizing code generation.

• Real life example: AVL trees can be used in a file system to efficiently store and retrieve data in a balanced manner.

No, different methods are required for different operations in API.

• Different methods are required for different HTTP verbs like GET, POST, PUT, DELETE.

• Methods should be designed to perform specific actions like fetching data, updating data, etc.

• Using a single method for all operations can lead to confusion and errors.

• For example, using GET method for updating data can cause security issues.

Kanpur Central Railway station is famous for being one of the busiest and largest railway stations in India.

• One of the busiest and largest railway stations in India

• Serves as a major transportation hub for the region

• Connects Kanpur to various parts of the country

• Historical significance as an important railway junction

Answers to common interview questions for Software Test Engineer position

• Locators in Selenium are used to locate elements on a web page, such as ID, name, class name, tag name, link text, and XPath

• Example of XPath for an element: //input[@id='username']

• findElement() is used to find a single element on a web page, while findElements() is used to find multiple elements

• Smoke testing is a preliminary testing to check if the software build is stable enough for further testing, San...read more