Vfs Global Services Senior Executive Interview Questions and Answers

Q1. Exceptions and thread implementation
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Q2. Basics of restful web services
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Q1. Finding the second maximum number in the list
Ans. 
To find the second maximum number in a list, sort the list in descending order and return the second element.
• Sort the list in descending order

• Return the second element in the sorted list
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Q1. Loops in Informatica
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Loops in Informatica are used to iterate over a set of data or perform repetitive tasks.
• Loops in Informatica can be implemented using the 'Expression' or 'Router' transformations.

• They are useful for processing multiple rows of data in a mapping.

• Common types of loops include 'While' and 'For' loops.

• Loops can help in performing complex data transformations and validations.
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Q1. What is the reason for change
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Two coding round in Javascript, first one to right CRUD operation in React.

Second one have to right JS for Flattened Array

Q1. Asking about Salary Structure
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Q1. Explain random forest
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Random forest is an ensemble learning method that builds multiple decision trees and merges them to improve accuracy and prevent overfitting.
• Random forest is a type of ensemble learning method.

• It builds multiple decision trees during training.

• Each tree is built using a subset of the training data and a random subset of features.

• The final prediction is made by averaging the predictions of all the individual trees.

• Random...read more
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Q2. What is boosting
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Boosting is a machine learning ensemble technique where multiple weak learners are combined to create a strong learner.
• Boosting is an iterative process where each weak learner is trained based on the errors of the previous learners.

• Examples of boosting algorithms include AdaBoost, Gradient Boosting, and XGBoost.

• Boosting is used to improve the accuracy of models and reduce bias and variance.
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Some mcq questions and coding question. Both where easy to medium level. Prepare combination/permutation/Time complexity etc

A question related to Binary search and some other follow ups.

Q1. Write a embedded C program which will communicate with DB and fetch some data back while using host and indicator varibles.
Ans. 
A C program that communicates with a database and retrieves data using host and indicator variables.
• Use appropriate database libraries and APIs to establish a connection with the database.

• Define host and indicator variables to store the fetched data.

• Write SQL queries to fetch the required data from the database.

• Execute the queries and retrieve the data into the host variables.

• Use the indicator variables to check for an...read more
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