Payfront Technologies Interview Questions and Answers

A standardized assessment that measures a person's skills, cognitive abilities, and potential to perform in a specific role.

Q1. Technical interview questions at Automatic Data Processing (ADP) may cover topics such as programming, databases, and software development.
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Q2. They may also ask about problem-solving and how you approach challenging tasks.
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Q3. Emphasize a structured method that involves clearly defining the issue, gathering relevant information, brainstorming potential solutions, evaluating options carefully, implementing the chosen solution, an...read more
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Q4. Data structures, algorithms, SQL querying, object-oriented programming principles, software development lifecycle, database concepts (relational vs. NoSQL), coding challenges in relevant languages (like Py...read more
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Q1. May ask about your background, skills, and how you handle challenges
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Q2. Background questions Tell me about yourself, What are your career goals, What are your strengths and weaknesses, What do you know about ADP, and Why do you want to work at ADP.
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Basic self evaluation test.

Q1. What project I have completed and follow-up questions on that?
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Q2. How to handle class imbalance.
Ans. 
Handling class imbalance involves techniques like resampling, using different algorithms, and adjusting class weights.
• Use resampling techniques like oversampling or undersampling to balance the classes.

• Utilize algorithms that are robust to class imbalance, such as Random Forest, XGBoost, or SVM.

• Adjust class weights in the model to give more importance to minority class.

• Use evaluation metrics like F1 score, precision, r...read more
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Q3. Basic Python coding questions.
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Q1. Data-related questions.
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Q2. ML Ops questions.
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Q1. What is ipconf.pl?
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Q2. What is the difference between scan vip & node vip?
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Q1. What is quarantile in Exadata?
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Q2. How to identify the master switch in Exadata?
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Q3. What is spine switch & leaf switch in exadata?
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One of the node of a 3 node cluster is down. Explain the step by step process to troubleshoot the issue.

Shell script & terraform code output was asked.

Basic Python, SQL, and Bash questions

Q1. SQL questions with operations that include changing from string to array. Tip: stick to RDBMS-specific dialects only (like Postgres), I used Spark SQL
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Q2. Simple Python questions with a follow-up to optimise it
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Q3. Bash script-based questions, are pretty basic.
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Q4. Data pipeline design and best practices.
Ans. 
Data pipeline design involves creating a system to efficiently collect, process, and analyze data.
• Understand the data sources and requirements before designing the pipeline.

• Use tools like Apache Kafka, Apache NiFi, or AWS Glue for data ingestion and processing.

• Implement data validation and error handling mechanisms to ensure data quality.

• Consider scalability and performance optimization while designing the pipeline.

• Doc...read more
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Q1. Easy to medium Leetcode-based question. With moderate difficulty.
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Q2. Simple Python-based question with optimisation.
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Q3. Design specific questions based on Data pipelines.
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Q1. SQL-based question with moderate difficulty.
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Q2. Python-based questions, follow questions with some optimisations.
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Q3. Bash-script based round.
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Q1. What. about . this. Company
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Q2. Sir. It. a. fast. grouting. Company. and. will.. learn. More.. new. technology. . In.. future
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Q3. So. In. my. Point. Of. View. definitely. Your.. Company.will.. be. One. Of. the.. leading. Companies. In. Your country
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Q4. It. is. fast. growing. company. and.. I Will. learn. more. new.. Works. In. future. I. know. It. good. facility
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Q5. It. Is. a. best platform. to. Start. my. Career. as. a. fresher. and. it's. helpful. In. any. Professional. growth
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Q6. This. Is. my career. sterling. time. I. think. your company. Is. a good. platform. fur. me. to. Improve. myself
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Q1. What. about. this. Company
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Q1. What. about. this. Company
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Q1. Resume related question
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Q2. Outlook PST backup
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Q1. Resume related question
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Q2. Last job role and responsibilities
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Q1. Desktop related
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Q2. Vlan configure and rules
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Q1. Network setup devices
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Q2. Vpn how to configure
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Q1. Why we hire you
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Q2. Previous job left
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Hacker Rack Test with medium to high difficulty

Q1. Explain your current project
Ans. 
I am currently working on developing a mobile application for tracking fitness goals and progress.
• Developing a mobile app using React Native

• Implementing features such as goal setting, progress tracking, and workout logging

• Integrating with wearable devices like Fitbit for data synchronization
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Q2. Questions about kakfa, ES and Java 8
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Q1. Similar questions on your current project and questions around kafka
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Basic Coding Java and algorithm questions

Q1. Technical question related to Java, Spring boot
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Q1. It was somehow managerial plus technical round.
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Q1. Project related question.
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Q1. Create basic react app with dummy data fetched from JSON API
Ans. 
Create a basic React app with dummy data fetched from a JSON API.
• Set up a new React project using create-react-app

• Create a component to fetch data from a JSON API using fetch or axios

• Display the fetched data in the component
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Q2. Array methods and Flatten array
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Q3. Event loop
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Q4. HTML and Javascript basics
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