Accenture ml engineer Interview Questions and Answers

Q1. What is the difference between Precision and Recall?
Ans. 
Precision is the ratio of correctly predicted positive observations to the total predicted positive observations, while Recall is the ratio of correctly predicted positive observations to the all observations in actual class.
• Precision focuses on the accuracy of positive predictions, while Recall focuses on the proportion of actual positives that were correctly identified.

• Precision = TP / (TP + FP)

• Recall = TP / (TP + FN...read more
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Q2. What are the hyperparameters of Random forest?
Ans. 
Hyperparameters of Random Forest include number of trees, max depth of trees, minimum samples per leaf, and maximum features.
• Number of trees: Determines the number of decision trees in the forest.

• Max depth of trees: Controls the maximum depth of each decision tree.

• Minimum samples per leaf: Specifies the minimum number of samples required to be at a leaf node.

• Maximum features: Determines the maximum number of features t
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Q1. Questions related to college projects.
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Q1. Basic python coding questions
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Q2. Nlp, ml related questions
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Q1. Coding in python
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Q2. Questions on the project
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Q1. About yourself and projects
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Q2. Mostly questions related to project, technology involve etc.
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Q1. What is linear regression
Ans. 
Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables.
• Linear regression aims to find the best-fitting straight line that describes the relationship between variables.

• It is commonly used for predicting numerical values based on input features.

• The equation for a simple linear regression model is y = mx + b, where y is the dependent vari...read more
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Q2. What is support vector machine
Ans. 
Support Vector Machine (SVM) is a supervised machine learning algorithm used for classification and regression tasks.
• SVM finds the hyperplane that best separates different classes in the feature space

• It works by maximizing the margin between the closest data points from different classes

• SVM can handle non-linear data by using kernel functions to map data into higher-dimensional space

• Examples: classifying emails as spam...read more
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Q1. What is difference between object detection and segmentation in image
Ans. 
Object detection identifies objects in an image, while segmentation assigns a label to each pixel in the image.
• Object detection involves identifying and locating objects within an image, often using bounding boxes.

• Segmentation assigns a class label to each pixel in the image, creating a pixel-wise mask for each object.

• Object detection is typically used when the goal is to identify and locate multiple objects in an imag...read more
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Q2. Technology used in camera sensor
Ans. 
Camera sensors use various technologies such as CMOS and CCD to capture images.
• CMOS (Complementary Metal-Oxide-Semiconductor) sensors are commonly used in modern digital cameras for their low power consumption and high image quality.

• CCD (Charge-Coupled Device) sensors are another type of sensor used in some cameras, known for their high-quality images but higher power consumption.

• Other technologies used in camera senso...read more
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Q1. Tell about sql joins
Ans. 
SQL joins are used to combine rows from two or more tables based on a related column between them.
• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN returns all rows from the right table and the matched rows from the left table.

• F...read more
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Q2. What ks difference between delete and update
Ans. 
Delete removes a record entirely, while update modifies an existing record.
• Delete removes the entire record from the database

• Update modifies specific fields of an existing record

• Delete is irreversible, while update can be undone by another update

• Example: Deleting a user account vs updating the user's email address
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Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
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Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.