Nielsen Software Engineer Interview Questions and Answers

Q1. Basic Form Validation on React Js but on a platform which doesn't have syntax highlighting. Expected best coding standards to be followed.
Ans. 
Implementing basic form validation in React ensures data integrity and enhances user experience.
• Use controlled components to manage form state effectively.

• Implement validation logic in the onSubmit handler to check for errors.

• Provide user feedback by displaying error messages next to the relevant fields.

• Utilize libraries like Formik or Yup for more complex validation scenarios.

• Ensure accessibility by using appropriate ...read more
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Q1. React Js and JavaScript questions
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Q1. Technical questions based on situations.
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Q1. SQL queries for aggregate functions.
Ans. 
SQL aggregate functions perform calculations on a set of values and return a single value.
• Common aggregate functions include COUNT(), SUM(), AVG(), MIN(), and MAX().

• Example: SELECT COUNT(*) FROM employees; // Counts total number of employees.

• Example: SELECT AVG(salary) FROM employees; // Calculates average salary of employees.

• Example: SELECT department, COUNT(*) FROM employees GROUP BY department; // Counts employees p...read more
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Q2. Internal working of hashmap
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Basic ds algo round with questions asked around arrays strings

Q1. Explain fail fast and fail safe iterator in Java
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