Vasta Global Interview Questions and Answers

The architecture diagram of the project showcases the overall structure and components of the system.

• The architecture diagram typically includes components like servers, databases, APIs, and client applications.

• It shows how these components interact with each other and the flow of data within the system.

• Commonly used tools for creating architecture diagrams include Microsoft Visio, Lucidchart, and draw.io.

Developed a data analysis project to optimize marketing strategies for a retail company.

• Utilized customer segmentation techniques to identify target demographics

• Analyzed sales data to determine the most effective marketing channels

• Implemented A/B testing to measure the impact of different marketing campaigns

The most frequent word in a sentence can be found by counting the occurrence of each word and selecting the one with the highest count.

• Split the sentence into words using whitespace as delimiter

• Create a dictionary to store the count of each word

• Iterate through the words and update the count in the dictionary

• Find the word with the highest count in the dictionary

Python code to find the root of a number

• Use the math module to access the sqrt() function

• Use the ** operator to raise the number to the power of 1/n

• Handle negative numbers by converting them to complex numbers

Decision Tree algorithm is a supervised learning algorithm used for classification and regression tasks.

• Decision Tree algorithm is based on a tree-like model of decisions and their possible consequences.

• It uses a set of rules to split the data into branches and make predictions at the leaf nodes.

• The algorithm selects the best attribute to split the data based on certain criteria like information gain or Gini index.

• Decision Trees can handle both categorical and numerical data....read more

Get second highest element from an array of strings with O(N) time complexity and O(1) space complexity.

• Initialize two variables to store the highest and second highest elements.

• Traverse the array and update the variables accordingly.

• Return the second highest element.

• Handle edge cases like empty array or array with only one element.

Coffiecent of x^7 in a given equation

• Use the binomial theorem to expand the equation

• Identify the term with x^7

• The coefficient of x^7 is the coefficient of that term

Sort nearly sorted array using min heap

• Create a min heap of size k+1

• Insert first k+1 elements into min heap

• For remaining elements, extract min and insert new element

• Extract all remaining elements from min heap

• Time complexity: O(nlogk)

• Example: ['apple', 'banana', 'cherry', 'date', 'elderberry']