Worldline SDE Interview Questions and Answers

Asked questions on arrays

Q1. Questions on databases
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Q2. Questions on data structures
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Q3. Questions on sql
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Q4. Questions on projects
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Q5. Questions on java
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Q1. Detailed project questions
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Q2. Explain completed gen ai project
Ans. 
Developed a generative AI model to create realistic images of fictional characters.
• Used GANs (Generative Adversarial Networks) to generate new images based on existing data.

• Trained the model on a dataset of character images from various sources.

• Implemented techniques like style transfer to enhance the diversity and creativity of generated images.

• Evaluated the model's performance based on image quality metrics and user
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Reasoning and quants

Q1. What is custody services
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Custody services involve safeguarding and managing financial assets on behalf of clients.
• Custody services typically include safekeeping of assets, settlement of trades, and collection of dividends and interest.

• Custodians may also provide reporting, tax support, and other administrative services to clients.

• Examples of custody service providers include banks, brokerage firms, and trust companies.
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Q2. Difference between Future and Forward contracts
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Future contracts are standardized and traded on exchanges, while forward contracts are customized and traded over-the-counter.
• Future contracts are traded on exchanges, while forward contracts are traded over-the-counter.

• Future contracts are standardized in terms of contract size, expiration date, and settlement, while forward contracts are customized based on the needs of the parties involved.

• Future contracts are marke...read more
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Basic array and vectors DSA questions

Q1. Asked me about my past project and my contribution in it
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Q2. Linux commands and c++ language control
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Q3. Asked me to write last function i wrote and explain what it does
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Q1. Asked me about my past projects and my contribution
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Q2. Checked my work ethics
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Q1. Basic hr questions
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Q2. Salary negotiation
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Write code to return the maximum profit by buying and selling stocks using available money

Q1. SQL Window functions
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Q2. Excel computed fields in pivot tables
Ans. 
Excel pivot tables allow users to create computed fields using formulas.
• In Excel pivot tables, computed fields are created by adding a new field with a formula.

• Formulas can be simple arithmetic operations or more complex calculations.

• Computed fields can be used to perform calculations on existing data in the pivot table.

• Examples: calculating profit margin by dividing revenue by cost, calculating average sales per month
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Q3. Difference in precision and recall
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Precision is the ratio of correctly predicted positive observations to the total predicted positives, while recall is the ratio of correctly predicted positive observations to the all observations in actual class.
• Precision focuses on the accuracy of positive predictions, while recall focuses on the proportion of actual positives that were correctly identified.

• Precision = TP / (TP + FP)

• Recall = TP / (TP + FN)

• Example: In...read more
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Q1. About past experience
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Q2. Past project details
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Q1. Dependency injection
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Q2. What are oops concepts
Ans. 
Object-oriented programming concepts that focus on data encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details
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