ZoomInfo Software Engineer Interview Questions and Answers

Q1. Basic java 8 concepts
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Q2. Basic spring boot questions
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Q1. Project discussion and basic java spring technical questions
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Q1. Rotate matrix by 90 degree
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Rotate a matrix by 90 degrees.
• Transpose the matrix

• Reverse each row of the transposed matrix
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Q2. Longest substring with unique characters
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The question asks for finding the longest substring in a given string that contains only unique characters.
• Iterate through the string and keep track of the current substring

• Use a set to check for duplicate characters

• Update the longest substring if a longer one is found
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Q1. A trie question
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Ecommerce hight level design

Q1. Node JS internal
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Q2. Previous project discussion
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Q1. What are Microservices
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Microservices are a software architecture pattern where applications are built as a collection of small, loosely coupled services.
• Microservices are independent and autonomous services that communicate with each other through APIs.

• Each microservice is responsible for a specific business capability and can be developed, deployed, and scaled independently.

• Microservices promote flexibility, scalability, and resilience in s...read more
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Q1. What are SOAP APIs
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SOAP APIs are a protocol for exchanging structured information in web services using XML-based messages.
• SOAP stands for Simple Object Access Protocol

• It is a messaging protocol that allows programs running on different operating systems to communicate with each other

• SOAP APIs use XML to format the data being sent

• They are commonly used in enterprise-level applications for integrating different systems

• SOAP APIs provide a
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Q2. What are Rest APIs?
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REST APIs are a set of rules and protocols that allow different software applications to communicate and interact with each other over the internet.
• REST stands for Representational State Transfer

• REST APIs use HTTP methods like GET, POST, PUT, DELETE to perform operations on resources

• REST APIs are stateless, meaning each request from a client to a server contains all the necessary information

• REST APIs typically return d...read more
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Q1. Implement queue,
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Q2. React life cycle
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Q3. Some output based questions
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Q4. What is polyfill, implemented one two polyfill
Ans. 
A polyfill is a piece of code that provides modern functionality on older browsers that do not natively support it.
• Polyfills are commonly used for adding support for new JavaScript features on older browsers.

• Two popular polyfills are 'Babel' for ES6 features and 'fetch' for the Fetch API.

• Polyfills help ensure a consistent user experience across different browsers.

• Polyfills can be implemented using JavaScript libraries ...read more
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Q5. Create todo list using react
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Create a todo list using React for managing tasks and reminders.
• Use React components to create a form for adding tasks

• Store tasks in state and display them in a list

• Add functionality to mark tasks as completed and delete tasks

• Implement features like filtering tasks by status or due date
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Q6. Closure and hoisting
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1 hr, Java questions, SQL question, 1 DSA question

Q1. LLD about Hotel Booking system
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Q1. Discussed about the project
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Simple ds algo and knowledge of nodejs

Q1. Simple question about your previous job
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Q2. Previous salary and previous work exp
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