DIRECT LOAD

Question

I have few questions in direct path data load.
I have below questions When we load direct path in sqlloader or use
APPEND hint in INSERT statement,
1. Does primary key/UNDIQUE INDEX/UNIQUE KEY disable during the direct load?
I know, check constraint and FK constraints are disabled. I am not sure about
other keys.
2. During the direct path load, does table have lock(exclusive lock)? if so,
others can not apply INSERT/UPDATE/DELETE on the table during the Direct load.
Please clarify?
3. During the direct path load, i believe, the indexes are disabled or unusable?.
Is that true?? Please clarify.

Answer 1

This is the original file before the load
100,Stévén,Kíng
101,Nééná,Kóchhár
102,Léx,Dé Háán
103,áléxándér,Húnóld
104,Brúcé,érnst
105,Dávíd,áústín
106,Vállí,Pátábállá
107,Díáná,Lóréntz
Character conversion after the load:
EMPLOYEE_ID LAST_NAME                 FIRST_NAME
        100 StΘvΘn                    Kφng
        101 NΘΘnß                     K≤chhßr
        102 LΘx                       DΘ Hßßn
        103 ßlΘxßndΘr                 H·n≤ld
        104 Br·cΘ                     Θrnst
        105 Dßvφd                     ß·stφn
        106 Vßllφ                     Pßtßbßllß
        107 Dφßnß                     L≤rΘntz
...