Farid

#### Check List: - [x] Tests pass (`./test.sh faridtmammadov` shows no differences between expected and actual outputs) - [x] All formatting changes by the build are committed - [x] Your...

Calling Get and Set method concurrently creates garbage values. I suggest read/write mutex to control this misbehaviour, since reading from hashtable and file is thread-safe, however read and write cause...

After deleting a key, when we call Get, empty string and ErrKeyNotFound returned. But after deleting a key, if close the store and open it, then call to Get returns...