Connexions Data Inc Interview Questions and Answers

Logic test and personality test

Q1. Introduce yourself
Ans. 
I am a sustainability consultant with a background in environmental science and experience in implementing sustainable practices.
• Background in environmental science

• Experience in implementing sustainable practices

• Passionate about promoting sustainability in various industries
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Q2. Why are you interested
Ans. 
Passionate about promoting sustainable practices and making a positive impact on the environment.
• Passionate about environmental conservation and sustainability

• Believe in the importance of implementing sustainable practices in businesses

• Excited about the opportunity to help organizations reduce their carbon footprint

• Previous experience in sustainability projects or initiatives
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Q1. Strength and witness
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Q2. A challenge you faced
Ans. 
I faced a challenge in my previous role when implementing a sustainability program for a large corporation.
• Resistance from upper management to allocate resources for sustainability initiatives

• Difficulty in engaging employees at all levels to participate in sustainability efforts

• Lack of buy-in from stakeholders outside of the organization

• Balancing short-term financial goals with long-term sustainability objectives
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Sliding window leet code style

Computer vision task. Image segmentation

Q1. What was the algorithm you used in the task
Ans. 
I used the Random Forest algorithm for the task.
• Random Forest is an ensemble learning method that builds multiple decision trees and merges them together to get a more accurate and stable prediction.

• It is commonly used for classification and regression tasks.

• Example: RandomForestClassifier in scikit-learn library.
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Q2. What are metrics you can use for this task
Ans. 
Metrics for evaluating machine learning tasks
• Accuracy

• Precision

• Recall

• F1 Score

• ROC AUC

• Confusion Matrix
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Q1. A presentation of a past project with followup questions
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Q2. Some questions on text classification
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Q1. Dumb HR will ruin the company or maybe they behave how the company wants them to behave.
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Q1. Questions about AWS services
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Q2. Data manipulation using Python
Ans. 
Python is commonly used for data manipulation tasks due to its powerful libraries like Pandas and NumPy.
• Use Pandas library for data manipulation tasks in Python

• Pandas provides data structures like DataFrame for easy manipulation

• Use NumPy for numerical operations on data arrays

• Example: df['new_column'] = df['column1'] + df['column2']
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Q1. How to do Costing for laying of pipelines.
Ans. 
Costing for laying pipelines involves calculating material costs, labor costs, equipment costs, and overhead expenses.
• Calculate the length of the pipeline needed

• Determine the type and size of pipes required

• Estimate the cost of materials including pipes, fittings, and valves

• Factor in labor costs for installation

• Consider equipment costs such as machinery and tools

• Include overhead expenses like permits, insurance, and pro...read more
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Q1. Hvac chiller service
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Q2. Installation
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Q1. Steam Turbines,Pump, Compressor,
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Q2. Rotating equipment parameters.
Ans. 
Rotating equipment parameters refer to the various factors that affect the performance and operation of rotating machinery.
• Key parameters include speed, torque, power, vibration levels, temperature, and lubrication.

• Proper monitoring and maintenance of these parameters are essential for ensuring optimal performance and preventing breakdowns.

• Examples of rotating equipment include pumps, compressors, turbines, and motors.

• ...read more
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Moderate aptitude questions.

String-based questions and DMA-based questions.

Q1. Communication protocols.
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Q2. Knowledge about communication protocols workings
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Reasoning portion, quantitative aptitude portion

Technical group discussion

Q1. Structure related questions
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Q2. Highway related questions
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Q3. Earthwork related questions
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