DA and ML

Which of the following is NOT a common data analytics tool?

• Microsoft Excel

• Python programming language

• Adobe Photoshop

• Tableau

What is the main goal of descriptive analytics?

• To predict future trends

• To summarize and understand past data

• To optimize business processes

• To identify cause-and-effect relationships

What is the purpose of data cleansing in data analytics?

• To make data more messy

• To remove valuable insights from data

• To share data with unauthorized users

• To prepare data for analysis by correcting errors and inconsistencies

Which statistical measure is used to describe the variability or spread of a dataset?

• Mean

• Median

• Mode

• Standard deviation

What is the purpose of feature engineering in machine learning?

• To build physical robots that can learn from experience

• To engineer features in a dataset to improve model performance

• To create complex mathematical models

• To visualize data using graphs and charts

Which algorithm is commonly used for classification tasks in machine learning?

• Support Vector Machine (SVM)

• Linear regression

• K-means clustering

• Principal Component Analysis (PCA)

What is the primary goal of supervised learning in machine learning?

• To uncover hidden patterns and structures in data

• To make predictions based on labeled data

• To explore large datasets and identify trends

• To automate decision-making processes

In unsupervised learning, what is the primary objective?

• To make predictions based on labeled data

• To uncover hidden patterns and structures in data

• To classify data into predefined categories

• To optimize model parameters to minimize errors

What is the purpose of feature scaling in machine learning?

• To remove outliers from the dataset

• To reduce the dimensionality of the dataset

• To normalize the range of features to a similar scale

• To increase the interpretability of the model

Which activation function is commonly used in the output layer of a binary classification neural network?

• ReLU (Rectified Linear Activation)

• Sigmoid

• Tanh (Hyperbolic Tangent)

• Softmax