4 颗豆豆
1. 单选题
30 秒
Which of the following statements about basic optimization principles is true?
Minimum time principle
The principle of minimizing the use of resources
The principle of the shortest statement
The principle of the best algorithm
2. 单选题
30 秒
Which of the following statements about database optimization is false?
Operating System kernel tuning
Database object design optimization
Database SQL statement optimization
Database system optimization
3. 单选题
30 秒
We should create index for all the columns in a table, because index scan is faster than the table scan.
True
False
4. 单选题
30 秒
Only if the distibution type of a table is HASH, then there could be a data skew problm, because the number of data in different DN could be different.
True
False
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