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Oracle Database Administration I Sample Questions (Q74-Q79):

NEW QUESTION # 74
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. NULLS influence the precedence of operators in an expression
C. The concatenation operator | | is always evaluated before addition and subtraction in an expression
D. The + binary operator has the highest precedence in an expression in a SQL statement
E. Multiple parentheses can be used to override the default precedence of operators in an expression

Answer: A,E

Explanation:
Reference:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/operators001.htm
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 # 75
Which three activities are recorded in the database alert log? (Choose three.)

A. Data Definition Language (DDL) statements
B. deadlock errors
C. non-default database parameters
D. session logins and logouts
E. block corruption errors

Answer: B,C,E

Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/monitoring001.htm#ADMIN11247

NEW QUESTION # 76
Examine the description of the CUSTOMERS table:

For customers whose income level has a value, you want to display the first name and due amount as 5% of their credit limit. Customers whose due amount is null should not be displayed.
Which query should be used?

A. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT
FROM customers
WHERE cust_income_level IS NOT NULL
AND cust_credit_limit IS NOT NULL;
B. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT
FROM customers
WHERE cust_income_level IS NOT NULL
AND due_amount IS NOT NULL;
C. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT
FROM customers
WHERE cust_income_level != NULL
AND cust_credit_level !=NULL;
D. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT
FROM customers
WHERE cust_income_level != NULL
AND due_amount != NULL;
E. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT
FROM customers
WHERE cust_income_level <> NULL
AND due_amount <> NULL;

Answer: A

NEW QUESTION # 77
The EMPLOYEES table contains columns EMP_ID of data type NUMBER and HIRE_DATE of data type DATE.
You want to display the date of the first Monday after the completion of six months since hiring.
The NLS_TERRITORY parameter is set to AMERICA in the session and, therefore, Sunday is the first day on the week.
Which query can be used?

A. SELECT emp_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 1) FROM employees;
B. SELECT emp_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 'MONDAY') FROM employees;
C. SELECT emp_id, ADD_MONTHS(hire_date, 6), NEXT_DAY('MONDAY') FROM employees;
D. SELECT emp_id, NEXT_DAY(MONTHS_BETWEEN(hire_date, SYSDATE), 6) FROM employees;

Answer: B

NEW QUESTION # 78
Which two statements are true regarding a SAVEPOINT? (Choose two.)

A. Only one SAVEPOINT may be issued in a transaction
B. A SAVEPOINT does not issue a COMMIT
C. Rolling back to a SAVEPOINT can undo a DELETE statement
D. Rolling back to a SAVEPOINT can undo a CREATE INDEX statement
E. Rolling back to a SAVEPOINT can undo a TRUNCATE statement

Answer: B,C

NEW QUESTION # 79
......

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