Worldline Full Stack Engineer Interview Questions and Answers

Q1. All Scenario questions about architecture and servers.
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Q1. OOP, Strings, react hooks, multithreading, security, streams, docker
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Q1. System design, security, deployment, design patterns, kubernetes
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Q1. Deployment, security, projects
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Q2. If needed, will you work on the older technology stack?
Ans. 
Yes, I am willing to work on older technology stacks if needed.
• I believe in being adaptable and open to learning new technologies.

• Working on older technology stacks can provide valuable experience and insights.

• It is important to understand the context and requirements before making a decision.

• Examples: Java Servlets, JSP, Struts, Hibernate, etc.
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Q1. What's the name of your collage?
Ans. 
I attended XYZ College.
• Attended XYZ College for my undergraduate degree.

• Studied computer science and gained a strong foundation in Java programming.

• Participated in various coding competitions and hackathons organized by the college.

• Collaborated with fellow students on group projects to develop fullstack Java applications.
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Q2. Salary expectation?
Ans. I had already read reviews that this company doesn't provide good hike, so I told her a range below 50%. In that, she came to the lowermost end. The weird thing is, providing insurance to you, from the salary money only.
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Q3. Which company did you work for?
Ans. I worked for a startup founded by IITians. The company age is 5-10 years and around 50 employees. The HR (Nikita Deshmukh) declared it as a fake company. This defaming behaviour by her was so rude and it's even reflecting how she is creating a bad image of the company she works for. It should be noted that every company was a startup before it turned into an MNC.
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Q4. Do you have bank statements with you?
Ans. 
NO
• No, I do not have bank statements with me.

• Bank statements are confidential documents and should not be shared during an interview.

• If required, I can provide proof of employment or salary through other means.
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Q5. When can you join?
Ans. As I'm relocating to other city, I need atleast 10 days for that. The HR insisted and and said we cannot give this much time. You'll need to join withing next 4 days.
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Q1. Java OOPS concepts abstract class vs interface
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Q2. SQL query to find duplicate values
Ans. 
Use GROUP BY and HAVING clause to find duplicate values in SQL.
• Use GROUP BY clause to group the data based on the column you want to check for duplicates.

• Use HAVING clause to filter out groups that have more than one entry, indicating duplicates.

• Example: SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name HAVING COUNT(*) > 1;
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Medium level interview experience

Q1. Good question but u need to think well
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