Zetwerk Interview Questions and Answers

Easy to medium questions, Questions on DSA and Node.js.

Q1. Valid parenthesis
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Q2. Three sum problem
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The three sum problem involves finding unique triplets in an array that sum to zero.
• Sort the array to simplify finding triplets.

• Use a loop to fix one element and apply two-pointer technique for the rest.

• Skip duplicates to ensure unique triplets.

• Example: For array [-1, 0, 1, 2, -1, -4], the triplets are [-1, -1, 2], [-1, 0, 1].
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Q1. What are the differences between White box testing and Black box testing?
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White box testing is based on the internal logic of the software being tested, while black box testing focuses on the functionality of the software.
• White box testing is also known as clear box testing or glass box testing.

• Black box testing is also known as functional testing.

• White box testing is done by developers to ensure code coverage and identify logical errors.

• Black box testing is done by testers to validate the f...read more
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Q2. What are the differences between validation and verification?
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Validation ensures the right product is being built, while verification ensures the product is being built right.
• Validation confirms that the product meets the customer's requirements and needs.

• Verification ensures that the product conforms to the specified requirements and standards.

• Validation is about checking if the right product is being built, while verification is about checking if the product is being built corr...read more
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Q3. How do you write test cases for Login page and Payment gateway?
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Test cases for Login page and Payment gateway are written by identifying various scenarios, inputs, and expected outcomes.
• Identify positive test cases for successful login and payment transactions.

• Identify negative test cases for invalid credentials, error messages, and failed transactions.

• Include boundary test cases for maximum and minimum input values.

• Test for different user roles and permissions.

• Verify the security ...read more
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Q4. How do you automate filtering and validate it's been filtered as desired?
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Automate filtering by using scripting languages like Python or tools like Selenium. Validate by comparing expected and actual results.
• Use scripting languages like Python to automate filtering process.

• Utilize tools like Selenium for automated testing of filtering functionality.

• Validate filtering by comparing expected results with actual results.

• Implement test cases to ensure filtering is working as desired.
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Q5. What is backend and how does it work?
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Backend refers to the server-side of an application where data processing and storage occurs.
• Backend is responsible for handling data processing, storage, and retrieval.

• It interacts with the frontend to deliver the final product to the user.

• Common backend technologies include databases like MySQL, programming languages like Java or Python, and frameworks like Node.js.

• Backend code runs on the server and responds to requ...read more
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Q6. For testers what is the use of Git and Jenkin?
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Git and Jenkins are essential tools for testers to manage code versions and automate testing processes.
• Git is used for version control, allowing testers to track changes in code and collaborate with team members.

• Jenkins is used for continuous integration and continuous delivery (CI/CD), automating the testing process and providing feedback on code quality.

• Testers can use Git to create branches for different features or...read more
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Q7. Give me a simple example of API.
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An example of API is a weather API that provides real-time weather data to a mobile app.
• API stands for Application Programming Interface

• It allows different software applications to communicate with each other

• Examples include Google Maps API, Twitter API, and Spotify API
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Q8. What are the difference between Smoke and Sanity?
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Smoke testing is a preliminary test to check if the software build is stable, while sanity testing is a subset of regression testing to ensure that specific functionalities are working correctly.
• Smoke testing is done to check if the software build is stable enough for further testing, while sanity testing is done to check specific functionalities after changes.

• Smoke testing is a shallow and wide approach, covering all ...read more
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Q9. Scenario : You have 100 data sets for a field . how do you validate it
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To validate 100 data sets for a field, use statistical analysis, data visualization, and comparison with known standards.
• Perform statistical analysis on the data sets to identify outliers and inconsistencies

• Use data visualization techniques such as histograms, box plots, and scatter plots to visually inspect the data

• Compare the data sets with known standards or benchmarks to ensure accuracy and consistency

• Utilize autom...read more
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Q1. Solar Project Execution and Electrical AC and DC
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Q2. What can you tell me about your background as an Electrical Engineer?
Ans. 
I have over 10 years of experience in electrical engineering, specializing in power systems and renewable energy solutions.
• Led a team in designing a solar power plant that increased energy efficiency by 30%.

• Developed and implemented a predictive maintenance program for electrical systems, reducing downtime by 25%.

• Worked on the integration of smart grid technologies to enhance energy distribution and management.

• Conducte...read more
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Q1. What is your understanding of welding consumption reports, and how do you maintain them?
Ans. 
Welding consumption reports track materials used in welding processes, ensuring efficiency and cost management.
• Welding consumption reports detail the amount of welding materials used, such as electrodes and filler metals.

• These reports help in budgeting and forecasting for future projects by analyzing past consumption patterns.

• For example, if a project used 500 kg of filler metal, this data can inform future project est...read more
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Q2. Rate of client or contractors
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Understanding client and contractor rates is crucial for project budgeting and resource allocation in engineering.
• Rates can vary based on project complexity; for example, specialized engineering tasks may command higher fees.

• Geographical location impacts rates; urban areas often have higher contractor rates compared to rural regions.

• Experience level of contractors affects rates; seasoned professionals typically charge ...read more
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Q3. How can piping fronts be generated for erection?
Ans. 
Piping fronts for erection can be generated through planning, design, and coordination of construction activities.
• 1. Detailed Design: Create comprehensive piping designs using CAD software to visualize the layout.

• 2. Material Procurement: Ensure all necessary materials are ordered and available on-site before erection begins.

• 3. Construction Sequencing: Develop a logical sequence for installation to optimize workflow and...read more
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Q4. What is the daily progress tracking process for a welder?
Ans. 
Daily progress tracking for welders involves monitoring tasks, quality, and productivity to ensure project timelines are met.
• Daily task logs: Welders should maintain a log of tasks completed each day, including types of welds and materials used.

• Quality checks: Implement regular inspections to ensure welds meet specified standards, documenting any defects.

• Time tracking: Use time sheets to record hours spent on each task...read more
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Q1. What's SOP , HIRA, JSA, Meeting
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SOP, HIRA, JSA, and meetings are essential components of safety management in engineering.
• SOP (Standard Operating Procedure): A document that outlines step-by-step instructions to perform a task safely.

• HIRA (Hazard Identification and Risk Assessment): A systematic process to identify hazards and assess risks associated with tasks.

• JSA (Job Safety Analysis): A technique to identify hazards associated with specific jobs a...read more
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Q2. Solar project, 66 kv gis project
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Q1. What strategies can be employed for effective management?
Ans. 
Effective management in civil engineering involves strategic planning, communication, and resource optimization.
• Set clear goals: Define specific, measurable objectives for projects to ensure all team members are aligned.

• Foster open communication: Encourage feedback and discussions among team members to enhance collaboration and problem-solving.

• Utilize project management tools: Implement software like MS Project or Trel...read more
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Q2. Can you explain a challenging situation you encountered and how you overcame it?
Ans. 
Faced a project delay due to unexpected site conditions, I implemented a strategic plan to realign resources and meet deadlines.
• Identified the issue: Unforeseen soil conditions caused delays in foundation work.

• Collaborated with geotechnical engineers to assess the situation and propose solutions.

• Rescheduled tasks and reallocated resources to maintain project momentum.

• Communicated transparently with stakeholders about t...read more
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Q3. What actions will you take for additional activities that are not included in the scope?
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Addressing additional activities outside the project scope requires careful assessment and communication.
• Conduct a thorough assessment of the additional activities to understand their impact on the project timeline and budget.

• Engage with stakeholders to discuss the necessity and benefits of including these activities in the project.

• Prepare a change request document outlining the additional activities, resources require...read more
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