Which of the following explains back propagation?
Answer(s): D
Back propagation computes the gradient of the loss (error) with respect to each weight by propagating the error signal backward through the network, then uses those gradients to adjust weights and biases.
A data scientist is building a proof of concept for a commercialized machine-learning model. Which of the following is the best starting point?
Answer(s): A
Before diving into selecting or tuning models, a literature review grounds the proof of concept in existing research and best practices, ensuring the approach aligns with state-of-the-art methods and the problem's domain requirements.
Which of the following best describes the minimization of the residual term in a LASSO linear regression?
LASSO regression retains the ordinary least squares loss by minimizing the sum of squared residuals (e²), with an added L1 penalty on the coefficients, but the residual term itself remains squared.
Which of the following layer sets includes the minimum three layers required to constitute an artificial neural network?
Answer(s): C
By definition, an artificial neural network requires at least these three fundamental layers: the input layer to receive data, one or more hidden layers to perform transformations, and the output layer to produce predictions. Pooling, convolutional, and dropout layers are useful in specialized architectures (e.g., CNNs) but aren't part of the minimal ANN structure.
A data scientist uses a large data set to build multiple linear regression models to predict the likely market value of a real estate property. The selected new model has an RMSE of 995 on the holdout set and an adjusted R2 of .75. The benchmark model has an RMSE of 1,000 on the holdout set. Which of the following is the best business statement regarding the new model?
Although the new model's RMSE is technically lower (995 vs. 1,000), the five-point improvement on holdout data is negligible in most real-estate contexts and unlikely to produce meaningful business value over the existing benchmark.
Post your Comments and Discuss CompTIA DY0-001 exam prep with other Community members:
Babs Commented on July 11, 2025 On point questions Anonymous
S Commented on July 11, 2025 Q58 answer should be A and C. PHILIPPINES
Krishna Commented on July 11, 2025 very good collection Anonymous
Kavitha Commented on July 11, 2025 Preparing ai 900 Anonymous
Neha Commented on July 11, 2025 Hi what is the correct answer for : You work as a Systems Administrator for your company. The company has recently purchased a subscription to Microsoft 365. All users in the company have a Microsoft 365 E3 license. The company has a large Sales department. You plan to deploy Microsoft Teams to users in the Sales department. You need to create a team in Microsoft Teams for the Sales department users. Users should automatically be added to the team when they join the Sales department. Users who leave the Sales department should automatically be removed from the team. Which of the following actions should you perform first? Create a dynamic distribution group and configure a membership rule for the group. Create an Azure Active Directory security group and add the Sales users to the group. Create an Office 365 group and configure a membership rule for the group. Create a new team by using the New-Team PowerShell cmdlet. Anonymous
Our website is free, but we have to fight against bots and content theft. We're sorry for the inconvenience caused by these security measures. You can access the rest of the DY0-001 content, but please register or login to continue.