If you are a SQL Database Developer, the interviewer may ask this question.
How to insert the data into Multiple tables, in addition, please do using a single query only.

Look like a simple question, but it is not. There are no multiple options for this exercise because INSERT is a DML statement and it has to run in transaction block at a time.

Check few below options:

Create sample tables:

CREATE TABLE tbl_A (ID INT)
CREATE TABLE tbl_B (ID INT)

Approach 1:

INSERT INTO tbl_A  
OUTPUT INSERTED.ID
INTO tbl_B 
SELECT 1

Approach 2:
Using stored procedure, we should control this kind of request.

CREATE PROCEDURE usp_InsertAll (@ID INT)
AS
BEGIN
INSERT INTO tbl_A VALUES (@ID)
INSERT INTO tbl_B VALUES (@ID)
END
GO

EXEC usp_InsertALL 2
GO

If you are a SQL Database Developer, you might be writing some condition like WHERE 1=1 or WHERE 1=2.
Here, I simply modified it and instead of WHERE 1=1 what do you think about WHERE NULL=NULL.

Last year, I asked this question and most of the developers were confused. Actually, NULL = NULL returns nothing because NULL is not a real value.

Check the below demonstration:

Create a table:

CREATE TABLE tbl_Employee (EmpID INT, EmpName VARCHAR(10), DOB DATE)

INSERT INTO tbl_Employee VALUES
(1,'Anvesh','19880126'),(2,'Jenny','19910409'),(3,'Alpesh','19930610')
,(4,'Roy','19910214'),(5,'Manish','19850505'),(6,'Nupur','19880808')

Returns all records:

SELECT * FROM tbl_Employee
WHERE 1=1

Returns nothing:

SELECT * FROM tbl_Employee
WHERE NULL=NULL