DQST

What does KPI stand for?

• Key Process Indicator
• Key Performance Indicator
• Key Product Index
• Known Performance Insight

Which of the following can cause data leakage?

• Removing null values
• Random shuffling
• Using test data during feature engineering
• Normalizing data separately

What does regularization primarily prevent?

• Data imbalance
• Overfitting
• Feature scaling
• Underfitting

Which of the following is NOT a deep learning framework?

• XGBoost
• TensorFlow
• PyTorch
• MXNet

Which BI concept refers to connecting multiple data sources logically without merging?

• Data blending
• Data joining
• Data appending
• Data pivoting

Which Power BI component is used to perform ETL operations?

• Power Query
• DAX
• Power Pivot
• ETransformX

What is the file extension of a standard Tableau workbook?

• .twbx
• .twb
• .tds
• .tbu

Which of the following is true about private variables in Python?

• Declared using private keyword
• Declared using double underscore __var
• Declared using single underscore _var
• Declared using protected keyword

How do you generate 5 numbers between 0 and 1 evenly spaced?

• np.arange(0,1,5)
• np.evenspace(0,1,5)
• np.linspace(0,1,5)
• np.evenspace(0,5,1)

Which scaling technique maps numeric values to 0–1 range?

• Z-score
• Min-Max normalization
• Log transform
• Standardization