Automatic Data Processing (ADP) Interview Questions and Answers for Freshers

Q1. Tell me about yourself?
Ans. 
Data Analytics Analyst with a passion for transforming data into actionable insights, skilled in statistical analysis and visualization tools.
• Educational background in Statistics and Data Science, with a Master's degree from XYZ University.

• Experience working with SQL and Python for data manipulation and analysis, including a project where I optimized a sales forecasting model.

• Proficient in data visualization tools like...read more
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Q2. Why ADP?
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ADP is a leading provider of HR and payroll solutions with a strong reputation for innovation and customer service.
• ADP has a strong reputation for innovation in HR and payroll solutions

• ADP is a leading provider in the industry with a wide range of services

• ADP has a strong focus on customer service and support

• ADP offers advanced data analytics tools and technologies for clients
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Q1. What do you know about SQL?
Ans. 
SQL is a programming language used for managing and manipulating relational databases.
• SQL stands for Structured Query Language

• It is used to communicate with databases to perform tasks such as querying data, updating data, and creating tables

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE

• SQL is used in various database management systems such as MySQL, PostgreSQL, Oracle

• Knowledge of SQL is essential for data ...read more
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Q2. How can you write a query to retrieve details from two tables and present them in a single table format?
Ans. 
Use SQL JOIN to combine data from two tables into a single table format.
• Use the JOIN keyword in SQL to combine data from two tables based on a related column.

• Specify the columns you want to retrieve from each table in the SELECT statement.

• Use the ON keyword to specify the column from each table that should be used for the join condition.

• You can use different types of joins such as INNER JOIN, LEFT JOIN, RIGHT JOIN, or ...read more
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Q3. What is the SQL query to retrieve the number of students grouped by their respective streams?
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SQL query to retrieve number of students grouped by streams
• Use the GROUP BY clause to group students by their streams

• Use the COUNT function to retrieve the number of students in each group

• Example: SELECT stream, COUNT(student_id) FROM students_table GROUP BY stream
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Basic technical question.

Q1. Basic iti questions.
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Q1. How can a Spring Boot project be created to develop an API that returns specified data?
Ans. 
A Spring Boot project can be created to develop an API by setting up a new Spring Boot project, defining API endpoints, and implementing the necessary logic.
• Create a new Spring Boot project using Spring Initializr

• Define API endpoints using @RestController annotation

• Implement the logic to return specified data in the API endpoints

• Use @GetMapping, @PostMapping, @PutMapping, @DeleteMapping annotations to map HTTP methods ...read more
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Q2. What is the code to print a right-angled triangle of numbers based on a given input number?
Ans. 
Use nested loops to print a right-angled triangle of numbers based on input.
• Use two nested loops to control the rows and columns of the triangle.

• Increment the number to be printed in each row.

• Example: If input is 5, the output would be: 1, 12, 123, 1234, 12345
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It was about 45mins aptitude test .

Q1. I was asked about the double Linked list, stack ,Queue.
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Q1. Logical questions
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