Dun & Bradstreet Interview Questions and Answers

Understanding model building and validation is crucial for data scientists, focusing on metrics and techniques for effective analysis.

• Define the problem clearly: Understand the business objective and translate it into a data science problem.

• Cost function: Choose an appropriate cost function that reflects the business goal, e.g., using log loss for classification tasks.

• WOE transformation: Weight of Evidence (WOE) i...read more

I approach complex situations with a structured method, focusing on analysis, communication, and collaboration for effective resolution.

• Analyze the situation: I break down the problem into smaller components to understand the root cause.

• Prioritize tasks: For example, in a previous role, I identified critical accounts needing immediate attention to streamline collections.

• Communicate effectively: I ensure all stakeh...read more

Reading messages from Google Cloud Pub/Sub involves creating a subscription and pulling messages from the subscription.

• Create a subscription to a Google Cloud Pub/Sub topic

• Use the subscription to pull messages from the topic

• Process the messages received from the subscription

Dividends from associates are recognized in consolidated statements as income, impacting the equity method of accounting.

• Dividends received from an associate are recognized as income in the income statement.

• Under the equity method, the investment in the associate is adjusted for the share of profits or losses, not dividends.

• For example, if an associate declares a dividend of $100, it will reduce the carrying amoun...read more

We plan to implement various strategies such as improving billing processes, offering discounts for early payments, and increasing communication with customers.

• Improving billing processes to ensure timely and accurate invoicing

• Offering discounts for early payments to incentivize customers to pay sooner

• Increasing communication with customers to address any issues or concerns that may be delaying payment

• Implementing...read more

Knn is used for classification, Naive Bayes for text classification, and different ML techniques for various tasks.

• Knn is used for classification problems where the data is labeled and the goal is to predict the label of new, unlabeled data points.

• Naive Bayes is used for text classification problems where the goal is to classify documents into different categories based on their content.

• Different ML techniques are...read more

Reactjs provides various ways to manage state including useState and useContext hooks.

• useState hook is used to manage state within a component

• useContext hook is used to share state between components

• Redux is a popular state management library for larger applications

• Reactjs also provides the useReducer hook for more complex state management

• Reactjs also supports server-side rendering for state management

Authentication in .NET involves verifying the identity of a user or application.

• Authentication can be achieved through various methods such as forms authentication, Windows authentication, and OAuth.

• Forms authentication involves creating a login page where users enter their credentials.

• Windows authentication uses the user's Windows credentials to authenticate.

• OAuth allows users to authenticate using their social m...read more