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NEW QUESTION 54
Which two statements are true about Enterprise Manager (EM) Express?
- A. You can shut down a database instance using EM Express.
- B. You cannot start up a database instance using EM Express.
- C. EM Express uses a separate repository database to store target database metadata.
- D. You can use a single instance of EM Express to manage multiple database running on the same server.
- E. By default, EM express is available for a database after database creation using DBCA.
Answer: B,E
NEW QUESTION 55
Which two statements are true about the rules of precedence for operators? (Choose two.)
- A. Arithmetic operators with equal precedence are evaluated from left to right within an expression
- B. The + binary operator has the highest precedence in an expression in a SQL statement
- C. The concatenation operator | | is always evaluated before addition and subtraction in an expression
- D. Multiple parentheses can be used to override the default precedence of operators in an expression
- E. NULLS influence the precedence of operators in an expression
Answer: A,D
Explanation:
Reference:
https://docs.oracle.com/cd/A87860_01/doc/server.817/a85397/operator.htm Precedence is the order in which Oracle evaluates different operators in the same expression. When evaluating an expression containing multiple operators, Oracle evaluates operators with higher precedence before evaluating those with lower precedence. Oracle evaluates operators with equal precedence from left to right within an expression.
NEW QUESTION 56
Which three statements are true about inner and outer joins? (Choose three.)
- A. A left or right outer join returns only unmatched rows
- B. Outer joins can be used when there are multiple join conditions on two tables
- C. Outer joins can only be used between two tables per query
- D. An inner join returns matched rows
- E. A full outer join must use Oracle syntax
- F. A full outer join returns matched and unmatched rows
Answer: A,D,F
Explanation:
Reference:
https://www.studytonight.com/dbms/joining-in-sql.php
NEW QUESTION 57
Which two are true about complete and incomplete recovery? (Choose two.)
- A. Uncommitted transactions will be rolled back after complete recovery completes.
- B. Uncommitted transactions will be rolled back after incomplete recovery completes.
- C. Incomplete recovery is possible only when the database is open.
- D. Only incremental backups can be used to roll forward the database while performing complete recovery.
- E. The database must have FLASHBACK enabled in order to perform incomplete recovery.
Answer: A,D
NEW QUESTION 58
The sales table has columns prod_id and quantity_sold of data type number In two queries execute successfully? x
- A. SELECT COUNT|prod_id> FROM sales WHERE quantity_sold > 55000 GROUP BY prod_id;
- B. SELECT prod_id FROM sales WHERE quantity_scld > 55000 AND COUNT(-) > 10 GROUP BY COUNT(-) > 10;
- C. SELECT prod_id FROM sales WHERE quantity_sold > 55000 GROUP BY prod_id HAVING COUNT(-) > 10;
- D. SELECT prod_id FROM sales WHERE quantity_sold > 5S000 AND COUNT(-) > 10 GROUP BY prod_id HAVING COUNT(-) > 10;
- E. SELECT COUNTlprod_id> FROM sales GROUP BY prod_id WHERE quantity_Sold > 55000;
Answer: A,C
NEW QUESTION 59
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