Database

Junior Level Interview Questions

Interview Questions (10)

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When working with a synced Record Type in Appian, I understand that data sync keeps the record data up to date in Appian's cache. However, two things are unclear to me:Which smart services automatically trigger a sync when data is written, and which ones require manual intervention?If a developer configures a scheduled sync (full or incremental) when setting up the Record Type, does that eliminate the need to worry about which smart services auto-sync or not?According to Appian's documentation, what is the correct understanding of how these sync mechanisms work together?

This is one of the most common points of confusion especially the assumption that a scheduled sync covers all data changes. It does not, and understanding why requires knowing how ...

#records#data-sync#smart-services

Your user interface contains three independent sections, each displaying data from different database tables. These tables have no foreign key relationships or any other relational links. The requirement is to allow users to update the data in all three sections and save the changes back to the database using Write to Records.Question 1: How would you design the process model to handle writing data from all three unrelated sections back to their respective tables?Question 2: Based on your initial design, restructure the process model to demonstrate:How an End shape would be incorporatedHow a Terminate shape would be incorporatedExplain the purpose and placement of each within the redesigned flow.

Question 1: Designing for Multiple Unrelated SectionsWhen your UI contains three independent sections (A, B, and C) that map to three different database tables with no relational l...

If there is an error occurred in a queryEntity rule, what are the possible reasons ?

When answering this in a technical interview, categorize your response to show a structured understanding of how Appian interacts with the database."Errors in an a!queryEntity() ru...

What is view and materialized view ? What is the difference?

View:A view is a virtual table based on a SQL query.It does not store data physically.Every time you query a view, the database re-runs the underlying SELECT query to fetch the lat...

Can you describe a database‑related challenge you faced in one of your recent projects and explain how you resolved it?

Challenge: In one of my projects, users started entering emojis in text fields such as names, comments, and messages. Our MySQL database was using the utf8 character set, which onl...

Difference between Store procedure & View ?

ViewA View is a virtual table created using a SQL SELECT statement. It does not store data itself (except indexed/materialized views); it only stores the query.Key PointsRead-only ...

What is the maximum limit to retrieve data through Query Entity ?

It is 1MB (default) limit and it can be increased, when increasing this value, apply a corresponding increase to the maximum memory heap size of JVM for the application server.

What is a JOIN in SQL? List and explain the types of JOINs used in SQL with examples

A JOIN clause is used to combine rows from two or more tables, based on a related column between them.Here are the different types of the JOINs in SQL:(INNER) JOIN: Returns records...

You are given two tables: Employee and Department. Each employee is associated with a department through the dept_id column. Write an SQL query to retrieve the number of employees in each department.Ensure that the result includes all departments, even those that currently have no employees.

Assuming Tables:Department Table| dept_id | department_name || ------- | --------------- || 1 | HR || 2 | IT || 3 | Finance || 4...

What are the indexes, advantages + disadvantages?

Indexes in SQL are special database structures that speed up data retrieval by allowing quick access to records instead of scanning the entire table. They act like a lookup system ...

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Database Appian Interview Questions — Junior Level

Database

Interview Questions (10)

If there is an error occurred in a queryEntity rule, what are the possible reasons ?

What is view and materialized view ? What is the difference?

Can you describe a database‑related challenge you faced in one of your recent projects and explain how you resolved it?

Difference between Store procedure & View ?

What is the maximum limit to retrieve data through Query Entity ?

What is a JOIN in SQL? List and explain the types of JOINs used in SQL with examples

You are given two tables: Employee and Department. Each employee is associated with a department through the dept_id column. Write an SQL query to retrieve the number of employees in each department.Ensure that the result includes all departments, even those that currently have no employees.

What are the indexes, advantages + disadvantages?

Database

Interview Questions (10)

If there is an error occurred in a queryEntity rule, what are the possible reasons ?

What is view and materialized view ? What is the difference?

Can you describe a database‑related challenge you faced in one of your recent projects and explain how you resolved it?

Difference between Store procedure & View ?

What is the maximum limit to retrieve data through Query Entity ?

What is a JOIN in SQL? List and explain the types of JOINs used in SQL with examples

You are given two tables: Employee and Department. Each employee is associated with a department through the dept_id column. Write an SQL query to retrieve the number of employees in each department.Ensure that the result includes all departments, even those that currently have no employees.

What are the indexes, advantages + disadvantages?