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NEW QUESTION 37
Examine these commands which execute successfully in the sequence shown in Sessions S1 and S2:

Now, examine this statement that execute successfully in s1:
S1> SELECT * FROM emp;
Which is true about the result of the select statement?

• A. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
• B. The inserted row is not returned because the transaction still active in s2.
• C. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
• D. The inserted row is returned because the transaction is auto committed in S2.

Answer: D

NEW QUESTION 38
Which select statement returns true?

• A. SELECT NULL = NULL;
• B. SELECT NULL <> NULL;
• C. SELECT NULL <=> NULL;
• D. SELECT NULL := NULL;

Answer: D

NEW QUESTION 39
Which two statements are true about aggregate functions?

• A. SUM () returns o if there are no rows to aggregate.
• B. MIN () cannot use distinct when it executes as a Windows function.
• C. MAX () returns null if there are no rows to aggregate.
• D. COUNT (distinct) returns a count of the number of rows with different values including Null.
• E. AVG () does not allow use of the distinct option.

Answer: E

NEW QUESTION 40
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