How can get SQL Server Startup Parameter path ?

Method 1:

DECLARE  @startup VARCHAR(255)

DECLARE  @arg VARCHAR(10)

DECLARE  @i INT

SET @i = 0

SET @startup = ''

WHILE(@startup IS NOT NULL)

BEGIN

SET @arg = 'SQLArg'+CAST(@i AS VARCHAR(2))

SET @startup = NULL

EXEC xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer\Parameters', @arg,  @startup OUTPUT

SELECT @startup

SET @i= @i+1

END

Method 2:

SQL Server configuration Manager > SQL server services >SQL Server(<Instance Name>)>properties >Advanced > Startup Parameters