EPAM Systems Senior Test Engineer Lead Interview Questions and Answers

Q1. Reason for change
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Q2. Whats your expected salary?
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Q1. Roles and responsibilities
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Q2. How fo you handle situation
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Q1. Introduce your self
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Q2. How many people you have managed
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Q3. Explain this yocto recipe line by line
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Explaining a yocto recipe line by line
• Start with the metadata section, which includes the recipe name, version, license, and maintainer

• Next, define the dependencies required for the recipe to build successfully

• Followed by the source URL or file path for the source code

• Then specify any patches that need to be applied

• Configure the build options and settings

• Finally, define the install and package sections to specify how t
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Q4. Which version of Linux kernel you have worked on
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I have worked on Linux kernel versions 3.x, 4.x, and 5.x.
• Worked on Linux kernel versions 3.x, 4.x, and 5.x

• Experience with kernel development and debugging

• Familiar with kernel modules and drivers
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Q5. Path for bin directory in Linux
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The path for the bin directory in Linux is typically /bin.
• The bin directory in Linux contains essential binary executables.

• The path for the bin directory is usually /bin.

• Some common commands found in the bin directory include ls, cp, and mv.
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Q6. Path for sysconfig directory in Linux
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The path for sysconfig directory in Linux is /etc/sysconfig.
• The sysconfig directory in Linux is typically located at /etc/sysconfig.

• This directory contains configuration files for various system services and applications.

• Users can modify these configuration files to customize the behavior of their system.
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Q7. What kind of file are present in bindir and sysconfigdir in Linux
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Executable files are present in bindir and configuration files are present in sysconfigdir in Linux.
• bindir typically contains executable files such as binaries and scripts

• sysconfigdir typically contains configuration files for system-wide settings

• Examples: /usr/bin/ contains executable files, /etc/sysconfig/ contains configuration files
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Q8. Current and Expected salary
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Q1. Explain this yocto recipe line by line
Ans. 
Explaining a yocto recipe line by line
• Start with the recipe name and version

• Define the license and maintainer

• Specify the dependencies and build configuration

• Include the source URI and checksum

• Set up the build environment and compile the code
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Q2. Which versions of yocto have you worked on
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Q3. Have you done testing and what are the types of testing
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Yes, I have experience in testing. Types of testing include unit testing, integration testing, system testing, and acceptance testing.
• Unit testing involves testing individual components or functions of the software.

• Integration testing checks if different modules work together correctly.

• System testing ensures the entire system functions as expected.

• Acceptance testing involves testing the software with end-users to ensur
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Q1. Difference between Cluster and Non-Cluster Index?
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Cluster index physically orders the data rows in the table, while non-cluster index does not.
• Cluster index determines the physical order of data rows in the table.

• Non-cluster index does not affect the physical order of data rows.

• Cluster index is faster for retrieval of data in the order specified by the index.

• Non-cluster index is faster for retrieval of data based on specific columns.

• Example: Cluster index on a primary...read more
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Q2. Difference between SQL DELETE and SQL TRUNCATE
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DELETE removes specific rows from a table, while TRUNCATE removes all rows from a table.
• DELETE is a DML command, while TRUNCATE is a DDL command.

• DELETE can be rolled back, while TRUNCATE cannot be rolled back.

• DELETE triggers delete triggers on each row, while TRUNCATE does not trigger any delete triggers.

• DELETE is slower as it maintains logs, while TRUNCATE is faster as it does not maintain logs.
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Q1. Remove duplicates in an array
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Use a hash set to remove duplicates in an array of strings
• Create a hash set to store unique elements

• Iterate through the array and add each element to the hash set

• Convert the hash set back to an array to get the unique elements
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Q2. What is react virtual DOM
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React virtual DOM is a lightweight copy of the actual DOM, used for efficient updates and rendering in React applications.
• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• React uses virtual DOM to efficiently update and render components without directly manipulating the actual DOM.

• When changes are made to the virtual DOM, React calculates the most efficient way to update the act...read more
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Q3. React hooks with example
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React hooks are functions that let you use state and other React features without writing a class.
• React hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• useContext() is a hook that allows you to use the con...read more
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Q1. Questions on core java concepts
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Q2. Questions on SQL and Springboot
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Q1. Questions on Collection framework.
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Q2. Questions on Springboot and core java
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Q1. Scenario based question
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Q2. Stream API questions
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Q1. What is regression testing?
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Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.
• Regression testing is performed after code changes to verify that the existing features still work correctly.

• It helps in identifying any defects introduced by new code changes.

• Automated testing tools are often used for regression testing to save time and effort.

• Regress...read more
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Q2. What is sanity?
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Sanity in software testing refers to a quick round of testing to ensure that the code changes have not adversely affected the existing functionality.
• Sanity testing is a subset of regression testing and is usually performed after a small code change or bug fix.

• It focuses on testing the most critical functionalities of the application to ensure they still work as expected.

• Sanity testing is not exhaustive and is meant to ...read more
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Q1. It was salary discussion
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Q2. It was about relocating
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Q1. Smoke vs sanity
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Smoke testing is a quick test to check if the basic functionalities of the software are working, while sanity testing is a more thorough test to ensure that the software is ready for further testing.
• Smoke testing is done to check if the critical functionalities of the software are working properly.

• Sanity testing is done to ensure that the software is stable and ready for further testing.

• Smoke testing is usually done be...read more
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Q2. Scrum and agile
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Round robin base in os schedule