For proper results, which of the following should contain a tsvector?

What is the command used to import a backup made with pg_dumpall > file.dmp?

Which of the following statements will produce an error?

To backup a database, the postmaster daemon must be halted.

The following statement will retrieve the second element of the array column products in table store_products.

SELECT products[1] FROM store_products;

SELECT 'infinity'::timestamp;

Will this statement produce an error?

What interfaces are available in the base distribution of PostgreSQL?

Which will retrieve the number of values stored in an array column?

What is the difference between to_tsvector() and ::tsvector ?

While creating a trigger, the function it will call may be created after it and attached to it

SELECT 'infinity'::timestamp;

Will this statement produce an error?