Depends on the requirements of the day Penelope. However Titanic would have been on sea Watches and her junior officers would have duties relative to these. I don't know if she was fully crewed but there would have been a great deal to do regarding familiarisation , organisation and general tidying-up to do. The chart room would be prepared, charts laid out for the voyage to Southampton. Titanic was scheduled to put to sea after successful trials had been completed and the builder's men had been sent ashore at Belfast. Any equipment or gear not wanted on voyage would be securely stowed away. There would be a thousand and one little things to be seen to. Everyone running round like the proverbial azure-reared flies. A decided 'buzz'. A junior officer's nightmare until they dropped the pilot and things settled down to the normal sea-going routine.
Jim C.