Practice Free PCED-30-01 Exam Online Questions
Question #51
In the context of data acquisition, what does ETL stand for?
- A . Extract, Transform, Load
- B . Extract, Transfer, Load
- C . Edit, Transform, Load
- D . Enhance, Transform, Load
Correct Answer: A
Question #52
Which of the following is not a valid variable name in Python?
- A . my_var
- B . myVar
- C . 1_var
- D . _var
Correct Answer: C
Question #53
Which of the following is NOT a commonly used tool for data acquisition and pre-processing?
- A . Python
- B . SQL
- C . Excel
- D . Tableau
Correct Answer: D
Question #54
What is the process of converting text data into a numerical format that can be used for analysis in machine learning algorithms?
- A . Feature Engineering
- B . Data Normalization
- C . Text Pre-Processing
- D . Data Wrangling
Correct Answer: C
Question #55
What is the purpose of principal component analysis (PCA) in data modeling?
- A . To reduce the dimensionality of the dataset
- B . To increase the complexity of the model
- C . To prioritize features based on their importance
- D . To create interaction terms between features
Correct Answer: A
Question #56
What is the first step in the data acquisition process?
- A . Data cleaning
- B . Data validation
- C . Data collection
- D . Data visualization
Correct Answer: C
Question #57
What does covariance measure in terms of two variables?
- A . Only the strength of the linear relationship
- B . The direction of the relationship
- C . The shape of the relationship
- D . Both the direction and the strength of the linear relationship
Correct Answer: D
Question #58
Which of the following techniques is used to handle missing data in a dataset?
- A . Data transformation
- B . Principal Component Analysis
- C . Imputation
- D . Feature selection
Correct Answer: C
Question #59
Which of the following is NOT a commonly used method for data pre-processing?
- A . Data cleaning
- B . Data integration
- C . Data visualization
- D . Data transformation
Correct Answer: C
Question #60
What is the purpose of the ‘for’ loop in Python?
- A . Declares a new function
- B . Repeats a block of code for a specified number of times
- C . Allows for looping over elements of a sequence
- D . Terminates the execution of a loop
Correct Answer: C