interview questions

hi bw experts,

iam attended some interview. i have some doubts , can u clarify me these doubts,

1,what is slowly changing dimensions, can u give me eample.

2,did u modified the cube, when it is necessary

3,what is kpi , how do u measure?can u name it?

4,what is difference between transfer rules and update rules?

5,,what is repetitve data?

6,how do u design u own ods?

7, what is transaction of performance issues?

8,performance issues on front end?

9,what is testing?steps involved?tools uded?

10,what do u mean by parallel load?

11, what is adoc query ? whaen it is used?

12,how do u track the histroical data?

12?how m,any types of historiers are available in datawarehosing?

13,why transfer rules and not updaterule

14, what is realignment?

thank u very much can u do favour me.