Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_27 (operating_system_version VARCHAR, memory___ram__ VARCHAR)
### Question:
Which operating system has 1GB (mobile ddr) memory (RAM)?
### Answer:
SELECT operating_system_version FROM table_name_27 WHERE memory___ram__ = "1gb (mobile ddr)"