o9 Solutions Consultant Interview Questions and Answers

The angle between the hour hand and minute hand at 3:15 is 7.5 degrees.

• At 3:00, the hour hand is at the 3 o'clock position, which is 90 degrees.

• In 15 minutes, the minute hand moves 90 degrees (360 degrees divided by 4).

• The hour hand also moves slightly in 15 minutes, covering 7.5 degrees (30 degrees divided by 4).

• Therefore, the angle between the hour hand and minute hand at 3:15 is 7.5 degrees.

Factorial code using recursion

• Recursion is a technique where a function calls itself

• Factorial of a number is the product of all positive integers less than or equal to that number

• To calculate factorial using recursion, the base case is when the number is 0 or 1

• The recursive step is to call the factorial function with the number decremented by 1 and multiply it with the number itself

Supply Chain is the process of managing the flow of goods and services from the point of origin to the point of consumption.

• Involves planning, sourcing, producing, delivering, and returning goods and services

• Focuses on efficiency, cost-effectiveness, and customer satisfaction

• Examples include inventory management, transportation logistics, and supplier relationships

Trim is used in SQL to remove leading and trailing spaces from a string.

• Trim function is used to remove leading and trailing spaces from a string

• It is commonly used to clean up data before performing comparisons or concatenations

• Syntax: TRIM([LEADING | TRAILING | BOTH] [characters] FROM [string])

• Example: SELECT TRIM(' hello ') as trimmed_string

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Normalization involves breaking down data into smaller, more manageable tables.

• It helps in reducing data redundancy by storing data in a structured manner.

• Normalization ensures data integrity by avoiding update anomalies.

• There are different normal forms such as 1NF, 2NF, 3NF, and BCNF.

• Example: In a database, instead of storing customer details in multiple tables, norm...read more

SQL commands are used to interact with databases and perform various operations.

• SELECT: retrieves data from a database

• INSERT: inserts new data into a database

• UPDATE: modifies existing data in a database

• DELETE: deletes data from a database

• CREATE: creates a new database, table, or view

• ALTER: modifies the structure of a database object

• DROP: deletes a database object

• JOIN: combines rows from two or more tables based on a related column

• GROUP BY: groups rows based on a specified col...read more