200+ Software Testing Engineer Interview Questions and Answers

Software testing is the process of evaluating a software application or system to find defects and ensure it meets the specified requirements.

• Testing is done to identify defects and ensure the software meets the requirements

• It involves executing the software with the intent of finding errors

• Testing can be done manually or with the help of automated tools

• Types of testing include functional, performance, security, and usability testing

• Testing is an iterative process that contin...read more

Merge sort is a divide and conquer algorithm. Best for large data sets. Code: https://bit.ly/3jJ5J5z

• Divide the array into two halves

• Sort each half recursively

• Merge the sorted halves

• Best for large data sets

• Code: https://bit.ly/3jJ5J5z

The program finds repeating characters in a given string.

• Iterate through each character in the string

• Store each character in a data structure

• If a character is already present in the data structure, it is a repeating character

Stress testing tests the system's ability to handle extreme conditions, while load testing tests its performance under normal conditions. Manual testing is done by humans to find defects, while functional testing checks if the system meets requirements.

• Stress testing checks the system's response to extreme conditions like high traffic or low memory.

• Load testing checks the system's performance under normal conditions like average traffic.

• Manual testing is done by humans to fin...read more

I ensure accurate data entry and reconciliation with stockist records.

• Verify stockist data against company records

• Ensure accurate data entry and reconciliation

• Communicate with stockist to resolve discrepancies

• Maintain detailed records of all transactions

• Use software tools to streamline data management

Answers to common interview questions for a Software Testing Engineer position.

• Testing is the process of evaluating a system or its component(s) with the intent to find whether it satisfies the specified requirements or not.

• Scrum is an agile framework for managing work, and Sprint is a time-boxed iteration of work in Scrum.

• API methods are functions that allow developers to interact with a software application or web service.

• Smoke testing is a quick and shallow test to ensure ...read more

Spike and Zero Sprint are Agile terms used for addressing uncertainties and technical challenges.

• Spike is a time-boxed research activity to explore potential solutions or gather information.

• Zero Sprint is a short sprint used to set up the project environment, tools, and infrastructure.

• Spike helps in making informed decisions and reducing risks before committing to a full sprint.

• Zero Sprint ensures that the team is ready to start the project without any technical hindrances.

• Bo...read more

Integration testing is a type of testing where multiple components are tested together to ensure they work as expected.

• Test cases should cover all possible combinations of inputs and outputs

• Test cases should include both positive and negative scenarios

• For an ATM, test cases should cover withdrawal, deposit, balance inquiry, and error scenarios

• Test cases should also cover integration with external systems such as the bank's database

Defect life cycle is the process of identifying, reporting, prioritizing, fixing, and verifying defects in software.

• Defect is identified by testers during testing

• Defect is reported to development team

• Development team prioritizes and fixes the defect

• Fixed defect is verified by testers

• If defect is not fixed, it goes back to development team

• If defect is fixed, it is closed

Agile testing is important for continuous feedback, quick adaptation to changes, and delivering high-quality software.

• Allows for continuous feedback from stakeholders and customers

• Enables quick adaptation to changes in requirements or priorities

• Helps in delivering high-quality software in shorter iterations

• Promotes collaboration between developers, testers, and business stakeholders

Program to print right angle triangle of number pattern using Python.

• Use nested loops to print the pattern.

• The outer loop will iterate through the rows.

• The inner loop will iterate through the columns.

• Use the range function to control the number of rows and columns.

• Print the numbers in the pattern using string formatting.

To fetch data from a file in Java, we can use FileInputStream and BufferedReader classes.

• Create a FileInputStream object by passing the file path as a parameter.

• Create a BufferedReader object by passing the FileInputStream object as a parameter.

• Use the readLine() method of BufferedReader to read data from the file.

• Close the BufferedReader and FileInputStream objects using close() method.

A headless browser is a web browser without a graphical user interface that can be controlled programmatically.

• Headless browsers are used for automated testing and web scraping.

• Selenium can be used with headless browsers like Chrome, Firefox, and PhantomJS.

• Headless browsers are faster and consume less memory than traditional browsers.

• They are also useful for running tests in a continuous integration environment.

• Examples of headless browsers include Chrome Headless, Firefox He...read more

Early activities in periodic supervision can be checked through documentation and communication with relevant stakeholders.

• Review documentation such as meeting minutes and progress reports

• Communicate with supervisors and team members involved in the early activities

• Check for any deviations from the planned activities

• Ensure that all necessary steps were taken and documented

• Verify that any issues or concerns were addressed and resolved

Test cases for a pen and door handle

• Pen: ink flow, writing on different surfaces, durability, grip comfort

• Door handle: opening and closing mechanism, durability, ease of use, noise level

Testing Life Cycle includes planning, designing, executing and reporting. Bug Life Cycle includes reporting, assigning, fixing and verifying.

• Testing Life Cycle involves planning, designing, executing and reporting of tests.

• Bug Life Cycle involves reporting, assigning, fixing and verifying bugs.

• Testing Life Cycle starts with requirement analysis and ends with test closure.

• Bug Life Cycle starts with bug reporting and ends with bug closure.

• Testing Life Cycle ensures that the sof...read more

Virtual memory is a memory management technique that allows an operating system to use disk space as an extension of RAM.

• Virtual memory allows running programs to use more memory than physically available.

• It provides a larger address space for programs to store data and instructions.

• Virtual memory uses a combination of RAM and disk space to store data.

• It helps in multitasking by allowing multiple programs to run simultaneously.

• Virtual memory is managed by the operating system...read more

This program reverses each word in a given string while maintaining the original order of the words.

• Split the input string into words using space as a delimiter. Example: 'hello world' -> ['hello', 'world']

• Reverse each word individually. Example: 'hello' -> 'olleh', 'world' -> 'dlrow'

• Join the reversed words back into a single string with spaces. Example: ['olleh', 'dlrow'] -> 'olleh dlrow'

• Return or print the final reversed string.

Good results with minimum resources can be achieved by prioritizing tasks, automating processes, and utilizing efficient tools.

• Identify high priority tasks and focus on them first

• Automate repetitive tasks to save time and effort

• Use efficient tools and technologies to optimize resource utilization

• Collaborate with team members to share workload and expertise

• Implement agile methodologies to increase productivity and flexibility

Functional test cases verify if the software meets the requirements while non-functional test cases verify the software's performance.

• Functional test cases ensure the software meets the functional requirements

• Non-functional test cases ensure the software's performance, usability, and security

• Functional test cases are based on user requirements and use cases

• Non-functional test cases are based on performance, reliability, and security requirements

• Examples of functional test cas...read more

Program to count occurrences of each element in an array of strings.

• Create a dictionary to store the count of each element.

• Loop through the array and update the count in the dictionary.

• Print the count of each element from the dictionary.

Java is an object-oriented programming language that is platform-independent and has automatic memory management.

• Java is platform-independent, while C++ is platform-dependent.

• Java has automatic memory management, while C++ requires manual memory management.

• Java is an object-oriented language, while C++ supports both procedural and object-oriented programming.

• Java has a simpler syntax than C++.

• Java has a larger standard library than C++.

• Java is used for developing web applicat...read more

Implement a function to validate user input for a registration form.

• Use regex to validate email format, e.g., /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/

• Check password strength: at least 8 characters, one uppercase, one number.

• Ensure username is unique by checking against a database or list.

• Provide user-friendly error messages for invalid inputs.

Data can be uploaded from source to target using ETL tools or manual data entry.

• Extract data from source system

• Transform data to match target system requirements

• Load data into target system

• Use ETL tools like Informatica, Talend, or SSIS

• Manual data entry can be done through UI or APIs

Priority and severity are terms used in software testing to indicate the importance and impact of a defect.

• Priority refers to the level of urgency in fixing a defect, based on its impact on the system and business goals.

• Severity refers to the degree of impact a defect has on the system's functionality and user experience.

• Example: A defect that causes the system to crash would have high severity, while a defect that affects a minor feature would have low severity but high prio...read more

If time is less, prioritize testing based on risk and criticality.

• Identify critical functionalities and test them first

• Use automation testing to save time

• Focus on high priority test cases

• Perform exploratory testing to cover maximum scenarios

• Collaborate with the team to divide and conquer

• Use risk-based testing approach

Import and export operations involve transferring data or files between different systems or formats.

• Import operations involve bringing data or files into a system or application.

• Export operations involve sending data or files out of a system or application.

• Import and export operations are commonly used in software applications to transfer data between different formats or systems.

• Examples of import and export operations include importing a CSV file into a database, exporting...read more