Tiger Analytics Data Analyst Interview Questions and Answers

We can use statistical analysis to prove that students in higher classes are taller than those in lower classes.

• Collect height data of students from different classes

• Use statistical measures like mean, median, and mode to compare the heights of students in different classes

• Perform hypothesis testing to determine if the difference in height between classes is statistically significant

• Visualize the data using graphs and charts to make it easier for the client to understand

• Provi...read more

Permutation and combination are mathematical concepts used to count the number of possible outcomes in a given scenario.

• Permutation is the arrangement of objects in a specific order while combination is the selection of objects without considering the order.

• Permutation formula: nPr = n!/(n-r)! where n is the total number of objects and r is the number of objects selected.

• Combination formula: nCr = n!/r!(n-r)! where n is the total number of objects and r is the number of objec...read more

Compare two arrays in python and print if both of them are same or not.

• Use the '==' operator to compare the arrays.

• If the arrays have the same elements in the same order, they are considered the same.

• If the arrays have different elements or different order, they are considered different.

• Print 'Same' if the arrays are the same, otherwise print 'Different'.

Different types of indexing include primary indexing, secondary indexing, clustered indexing, and non-clustered indexing.

• Primary indexing: Index based on the primary key of a table, typically implemented using a B-tree structure.

• Secondary indexing: Index based on a non-primary key column, allowing for faster retrieval of data based on that column.

• Clustered indexing: Physically reorders the table based on the indexed column, leading to faster retrieval of data but slower inser...read more

Random forest is an ensemble learning method that builds multiple decision trees and merges their predictions.

• Random forest creates a set of decision trees from randomly selected subsets of the training data.

• Each tree in the random forest independently predicts the outcome, and the final prediction is made by averaging the predictions of all the trees.

• Random forest is effective in handling high-dimensional data and can handle missing values and outliers well.

• It is a popular a...read more

Macros in Excel are automated sequences of commands that can be created to perform repetitive tasks.

• Macros can be recorded or written using Visual Basic for Applications (VBA)

• They can automate tasks such as formatting, data manipulation, and calculations

• Macros can be assigned to buttons or keyboard shortcuts for easy access

• They can save time and reduce errors in repetitive tasks