List of top Data Science Questions asked in CBSE CLASS XII

Text documents are often grouped based on their content similarity to efficiently organize and categorise them for information retrieval systems and recommendation engines.
Identify and define the unsupervised learning method utilized in this context.
What is Root Mean Square Deviation? Why is it used in data analysis?
Mention any two points of differentiation between Regression trees and Classification trees.
Explain cross-validation in data analysis.
Name one type of chart/graph suitable for analysing a single variable (univariate analysis) and one type for analyzing the relationship between two variables (bivariate analysis).
Which problem-solving approach does the K-means algorithm employ?

The following graph represents:

When determining the line of best fit in linear regression, which method is used to minimize the deviation of the line from the actual data points?

The following diagram represents:

Which statement correctly describes the use of regression and classification trees based on the nature of the dependent variable?
COPPA stands for ............... Online Privacy Protection Act.
What is a significant application of unsupervised learning in anomaly detection?
Consider the formula given below:
y ~ f(x, β)
where x is a vector of independent variables and y is the dependent variable.
Identify the type of regression from the following.
Which type of variable does linear regression predict?
Which fundamental principle does the K-Nearest Neighbours (K-NN) algorithm operate on?
Prediction of house prices in a city depends on factors such as the number of bedrooms, size of the house (square footage), location and age of the property. Which analysis technique is appropriate for this scenario?
Which of the following defines data privacy?
State if the following statement is True or False:
``Clustering Techniques apply when the instances are to be divided into natural groups.''
Assertion (A) : In real-life scenarios, a small RMSE value indicates a better model fit to the data and higher accuracy.
Reason (R) : A large RMSE value suggests that the model fits the data well.
How does the curse of dimensionality affect the performance of the K-Nearest Neighbours (K-NN) algorithm?
In case of a classification tree, predictions on unseen data are made using the ...............
Which of the following are common techniques for handling missing data in a dataset?
1. Remove the entire column of data.
2. Remove the row of data with missing values.
3. Insert a value close to the mean or mode of the variable with missing data.
4. Leave the missing data as it is.
5. Insert a random value.
CCPA stands for:
A website selling products uses recommendation engines to predict what products a customer is likely to purchase. This functionality is achieved through:
Which type of analysis is suitable for examining the relationship between rainfall and crop growth and the amount of crop growth for a certain level of rainfall?