Databricks Databricks-Machine-Learning-Professional Exam Dumps

Databricks Databricks-Machine-Learning-Professional Sample Question Answers

Question # 1

Which of the following machine learning algorithms typically uses bagging?

A. IGradient boosted trees 
B. K-means 
C. Random forest 
D. Decision tree

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Question # 2

The implementation of linear regression in Spark ML first attempts to solve the linear regression problem using matrix decomposition, but this method does not scale well to large datasets with a large number of variables. Which of the following approaches does Spark ML use to distribute the training of a linear regression model for large data?

A. Logistic regression 
B. Singular value decomposition 
C. Iterative optimization 
D. Least-squares method

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Question # 3

A data scientist has produced three new models for a single machine learning problem. In the past, the solution used just one model. All four models have nearly the same prediction latency, but a machine learning engineer suggests that the new solution will be less time efficient during inference. In which situation will the machine learning engineer be correct? 

A. When the new solution requires if-else logic determining which model to use to compute each prediction 
B. When the new solution's models have an average latency that is larger than the size of the original model 
C. When the new solution requires the use of fewer feature variables than the original model 
D. When the new solution requires that each model computes a prediction for every record E. When the new solution's models have an average size that is larger than the size of the original model 

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Question # 4

A data scientist has developed a machine learning pipeline with a static input data set using Spark ML, but the pipeline is taking too long to process. They increase the number of workers in the cluster to get the pipeline to run more efficiently. They notice that the number of rows in the training set after reconfiguring the cluster is different from the number of rows in the training set prior to reconfiguring the cluster. Which of the following approaches will guarantee a reproducible training and test set for each model?  

A. Manually configure the cluster
B. Write out the split data sets to persistent storage 
C. Set a speed in the data splitting operation 
D. Manually partition the input data

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Question # 5

A data scientist is developing a single-node machine learning model. They have a large number of model configurations to test as a part of their experiment. As a result, the model tuning process takes too long to complete. Which of the following approaches can be used to speed up the model tuning process?

A. Implement MLflow Experiment Tracking 
B. Scale up with Spark ML 
C. Enable autoscaling clusters 
D. Parallelize with Hyperopt 

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Question # 6

A machine learning engineer is trying to scale a machine learning pipeline by distributing its singlenode model tuning process. After broadcasting the entire training data onto each core, each core in the cluster can train one model at a time. Because the tuning process is still running slowly, the engineer wants to increase the level of parallelism from 4 cores to 8 cores to speed up the tuning process. Unfortunately, the total memory in the cluster cannot be increased. In which of the following scenarios will increasing the level of parallelism from 4 to 8 speed up the tuning process? 

A. When the tuning process in randomized  
B. When the entire data can fit on each core 
C. When the model is unable to be parallelized 
D. When the data is particularly long in shape E. When the data is particularly wide in shape

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