10+ SS Supply Chain Solutions Interview Questions and Answers

ETL and ELT tools are used for extracting, transforming, and loading data in data warehousing and analytics processes.

• ETL stands for Extract, Transform, Load and involves extracting data from various sources, transforming it into a usable format, and loading it into a data warehouse or database.

• ELT stands for Extract, Load, Transform and involves extracting data, loading it into a target system, and then transforming it as needed within the target system.

• ETL tools are typical...read more

Yes, a new column can be added in between 2 existing columns in a table by altering the table structure.

• Yes, a new column can be added in between 2 existing columns by using the ALTER TABLE statement in SQL.

• The new column can be specified to be added after a specific existing column.

• For example, ALTER TABLE table_name ADD new_column_name datatype AFTER existing_column_name;

Views in databases are virtual tables that display data from one or more tables based on a query.

• Views are used to simplify complex queries by storing them as a virtual table.

• They can hide the complexity of underlying tables and provide a layer of security by restricting access to certain columns.

• Types of views include simple views, complex views, materialized views, and indexed views.

Git merge combines changes from different branches, while rebase moves the current branch to the tip of another branch.

• Merge creates a new commit with combined changes, while rebase rewrites commit history.

• Merge preserves the commit history of both branches, while rebase creates a linear history.

• Merge is non-destructive and suitable for public branches, while rebase is destructive and should be used for private branches.

• Merge is easier to understand for beginners, while rebas...read more

Types of normalizations in databases help reduce redundancy and improve data integrity.

• First Normal Form (1NF) - Eliminates repeating groups and ensures each column contains atomic values.

• Second Normal Form (2NF) - Ensures all non-key attributes are fully functional dependent on the primary key.

• Third Normal Form (3NF) - Removes transitive dependencies by moving non-key attributes to separate tables.

• Boyce-Codd Normal Form (BCNF) - A stricter version of 3NF where every determin...read more

Types of joins include inner join, outer join, left join, right join, and full join.

• Inner join: Returns rows when there is a match in both tables

• Outer join: Returns all rows when there is a match in one of the 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

• Full join: Returns rows when there is a match in one of the tables

Top-down focuses on breaking down the problem into smaller parts, while bottom-up starts with small components and builds up.

• Top-down starts with a high-level overview and breaks it down into smaller components.

• Bottom-up starts with small components and gradually builds up to create a complete system.

• Top-down is more structured and easier to plan, while bottom-up is more flexible and iterative.

• Examples: Top-down - waterfall model, Bottom-up - agile development.

Git fork creates a copy of a repository under your GitHub account, while git clone creates a local copy of a repository.

• Fork creates a copy on GitHub, clone creates a local copy on your machine

• Forking allows you to make changes without affecting the original repository

• Cloning downloads the entire repository to your local machine

• Forking is commonly used for contributing to open source projects

SP is a stored procedure in a database, while a function is a piece of code that performs a specific task.

• SP is precompiled and stored in the database, while a function is compiled and executed at runtime.

• Functions can return a value, while SPs can return multiple result sets.

• Functions can be used in SQL queries, while SPs are called using EXECUTE statement.

Use a DELETE statement with a self-join on the table to remove duplicates.

• Use a DELETE statement with a self-join on the table to identify and remove duplicates.

• Example: DELETE t1 FROM table_name t1 INNER JOIN table_name t2 WHERE t1.id < t2.id AND t1.column_name = t2.column_name;

Debounce and throttling are techniques used in web development to limit the number of times a function is called.

• Debounce delays the execution of a function until after a specified time period has elapsed without additional calls.

• Throttling limits the rate at which a function is called, ensuring it is not called more than once within a specified time interval.

• Debounce is useful for handling events like resizing a window or typing in a search bar to prevent excessive function ...read more