How can you find out how many users are currently logged into the database?

633

---

How can you determine if an index needs to be dropped and rebuilt?

598

---

A developer is trying to create a view and the database won’t let him. He has the "developer" role which has the "create view" system privilege and select grants on the tables he is using, what is the problem?

714

---

You look at your fragmentation report and see that smon has not coalesced any of you tablespaces, even though you know several have large chunks of contiguous free extents. What is the problem?

651

---

If you have an example table, what is the best way to get sizing data for the production table implementation?

592

---

What file will give you oracle instance status information? Where is it located?

657

---

A tablespace has a table with 30 extents in it. Is this bad? Why or why not.

615

---

How would you find total size of database in os level?

604

---

What is ora-1555 snapshot too old error? Explain in detail?

728

---

What is an artificial (derived) primary key?

649

---

What is different type of rman backup?

709

---

You see multiple fragments in the system tablespace, what should you check first?

621

---

Users get the following error: ora-00055 maximum number of dml locks exceeded? What is the problem and how do you fix it?

562

---

Explain dual table. Is any data internally stored in dual table. Lot of users is accessing select sysdate from dual and they getting some millisecond differences. If we execute select sysdate from emp; what error will we get. Why?

614

---

How do you set up your tablespace on installation level: low?

594

---