CompTIA DY0-001 Online Practice Questions and Exam Preparation

CompTIA DY0-001 Online Questions & Answers

• Question 1:

  A data scientist observes findings that indicate that as electrical grids in a country become more and more connected over time, the frequency of brownouts and blackouts in total decrease, and the frequency of major brownouts and blackouts increase. Which of the following distribution metrics could best be identified?

  A. Scale axis magnitudes
  B. Kurtosis
  C. Skewness
  D. Normality
  B. Kurtosis

• Question 2:

  A computer vision model is trained to identify cats on a training set that is composed of both cat and dog images. The model predicts a picture of a cat is a dog. Which of the following describes this error?

  A. Error due to reality
  B. False positive error
  C. Sampling error
  D. Type II error
  D. Type II error

• Question 3:

  An analyst is examining data from an array of temperature sensors and sees that one sensor consistently returns values that are much higher than the values from the other sensors. Which of the following terms best describes this type of error?

  A. Synthetic
  B. Systematic
  C. Heteroskedastic
  D. Idiosyncratic
  B. Systematic

• Question 4:

  Which of the following is the layer that is responsible for the depth in deep learning?

  A. Convolution
  B. Dropout
  C. Pooling
  D. Hidden
  D. Hidden

• Question 5:

  Which of the following describes the appropriate use case for PCA?

  A. Dimensionality reduction
  B. Classification
  C. Regression
  D. Recommendation
  A. Dimensionality reduction

• Question 6:

  Given the equation:

  

  Xt = + 1Xt1 + t,where t N(0, ?

  Which of the following time series models best represents this process?

  A. ARIMA(1,1,1)
  B. ARMA(1,1)
  C. SARIMA(1,1,1) ?(1,1,1)1
  D. AR(1)
  D. AR(1)

• Question 7:

  A movie production company would like to find the actors appearing in its top movies using data from the tables below. The resulting data must show all movies in Table 1, enriched with actors listed in Table 2.

  

  Which of the following query operations achieves the desired data set?

  A. Perform an INNER JOIN between Table 1 using column Movie, and Table 2 using column Acted_In.
  B. Perform a UNION between Table 1 using column Movie, and Table 2 using column Acted_In.
  C. Perform an INTERSECT between Table 1 using column Movie, and Table 2 using column Acted_In.
  D. Perform a LEFT JOIN on Table 1 using column Movie, with Table 2 using column Acted_In.
  D. Perform a LEFT JOIN on Table 1 using column Movie, with Table 2 using column Acted_In.

• Question 8:

  Which of the following problem-solving approaches is a set of guidelines to handle highly variable and not fully apparent situations?

  A. Schedule
  B. Plan
  C. Heuristic
  D. Algorithm
  C. Heuristic

• Question 9:

  A data scientist is working with a data set that covers a two-year period for a large number of machines. The data set contains:

  Machine system ID numbers Sensor measurement values Daily timestamps for each machine

  The data scientist needs to plot the total measurements from all the machines over the entire time period. Which of the following is the best way to present this data?

  A. Scatter plot
  B. Line plot
  C. Histogram
  D. Box-and-whisker plot
  B. Line plot

• Question 10:

  Which of the following measures would a data scientist most likely use to calculate the similarity of two text strings?

  A. Word cloud
  B. Edit distance
  C. String indexing
  D. k-nearest neighbors
  B. Edit distance