If I complete a one-year PG diploma, can I then apply for a master's degree abroad?

Yes, you can apply for a master's degree abroad after completing a one-year postgraduate diploma. Many international universities consider applicants with a PG diploma, especially if it is in a relevant field and from a recognized institution. However, admission requirements vary by country and university - some may require a full bachelor's degree for direct entry, while others may accept a PG diploma. Be sure you also meet any English proficiency and standardized test requirements set by the programs you are interested in.