NASDAQ Senior Software Engineer Interview Questions and Answers

Q1. Tell me more about your experience
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Q1. Simple question not very hard related to java
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Q1. Mostly Tech related questions asked in first round
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Q2. Managerial round is the final one
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Q1. Explain how javascript works
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JavaScript is a high-level, interpreted programming language that is used to make web pages interactive.
• JavaScript is a client-side scripting language that runs in the browser.

• It is used to add interactivity to websites, such as form validation, animations, and dynamic content.

• JavaScript code is executed line by line and can manipulate the HTML and CSS of a webpage.

• It can also communicate with servers to retrieve or se
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Q1. Build a to do app in react
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A to do app built in React for managing tasks and deadlines.
• Use React components to create a user interface for adding, editing, and deleting tasks

• Implement state management to keep track of tasks and their completion status

• Utilize local storage or a backend server to persist tasks between sessions
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Q1. What is dependency injection
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Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing mock dependencies.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.
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Q2. What is state in react
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State in React is a JavaScript object that stores data and determines how a component renders and behaves.
• State is mutable and can be updated using the setState() method

• State should be used for data that will change over time and affect the component's rendering

• State should not be modified directly, use setState() instead
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Practical Question based on case study

Q1. More about the Techno Managerial
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Q2. More about the Techno functional round
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Q3. Technical Question
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Q4. Related to Skills
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Q5. Based on work we did
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There was a take home coding test - application to allot a parking lot.

Q1. Questions around optimisations around parking lot application submitted in round1. Implement more use cases asked on the spot System Design/Scaling related questions
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Q1. Mine was java, so Java technical questions, Java new features Questions around Design patterns Questions on SOLID principles
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Q1. Use case was given for wallet(e.g. pay later wallet) and asked to design basic REST APIs. E.g. User have balance in wallet User makes transaction via the wallet User add money in wallet
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Q1. It was 1 hour round. This was round with Engineering Technical Head. The questions were around willingness to work, long term / short term goals, high level behavioural questions, cross questions to evalua...read more
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Q1. This was HR round, around 20 minutes
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Q1. How to build an caching layer for iOS Apps
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Building a caching layer for iOS Apps
• Identify the data that needs to be cached

• Choose a caching mechanism (e.g., NSCache, CoreData, SQLite)

• Implement caching logic in the app's data access layer

• Define cache eviction policies to manage memory usage

• Consider using a cache expiration mechanism

• Handle cache invalidation when data changes

• Optimize cache performance by using appropriate data structures
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Q2. How to optimise image rendering for iOS Apps
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Optimizing image rendering for iOS Apps involves techniques like image compression, caching, lazy loading, and using the appropriate image formats.
• Use image compression techniques like JPEG or PNG optimization to reduce file size without compromising quality

• Implement caching mechanisms to store and retrieve images locally, reducing network requests

• Utilize lazy loading to load images only when they are needed, improving...read more
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Q3. Tell me about framework types in iOS
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There are several types of frameworks in iOS, including system frameworks, third-party frameworks, and custom frameworks.
• System frameworks are provided by Apple and include UIKit, Foundation, and Core Data.

• Third-party frameworks are developed by external developers and can be integrated into iOS apps, such as Alamofire and Firebase.

• Custom frameworks are created by developers for specific project needs and can be reused...read more
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