1Z0-071 REAL SHEETS - 1Z0-071 RELIABLE TEST OBJECTIVES

1z0-071 Real Sheets - 1z0-071 Reliable Test Objectives

1z0-071 Real Sheets - 1z0-071 Reliable Test Objectives

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Oracle Database SQL Sample Questions (Q37-Q42):

NEW QUESTION # 37
Which two statements are true about the rules of precedence for operators?

  • A. The concatenation operator || is always evaluated before addition and subtraction in an expression.
  • B. NULLS influence the precedence of operators in an expression.
  • C. Multiple parentheses can be used to override the default precedence of operators in an expression.
  • D. The + binary operator has the highest precedence in an expression in a SQL statements.
  • E. Arithmetic operators with equal precedence are evaluated from left to right within an expression.

Answer: C,E

Explanation:
A . True, arithmetic operators of equal precedence are evaluated from left to right within an expression, according to the standard SQL operator precedence. B. True, multiple parentheses can be used in an expression to change the order of operations and override the default precedence of operators.
C, D, and E are not correct because: C. The + binary operator does not have the highest precedence; multiplication and division have higher precedence in SQL. D. NULLS do not influence the precedence of operators in an expression; they may affect the result of an operation but not the order in which operators are evaluated. E. The concatenation operator (||) has lower precedence than arithmetic operators in SQL expressions.
Reference:
Oracle documentation on operator precedence: Oracle Database SQL Language Reference


NEW QUESTION # 38
Which two are true about savepoints?

  • A. After issuing a savepoint, you cannot roll back the complete transaction.
  • B. You can commit updates done between two savepoints without committing other updates In the current transaction.
  • C. They make uncommitted updates visible to sessions owned by other users.
  • D. They make uncommitted updates visible to other sessions owned by the? same user.
  • E. After issuing a savepoint, you can roll back to the savepoint name within the current transaction.
  • F. A rollback to savepoint command issued before the start of a transaction results In an error.

Answer: D,E


NEW QUESTION # 39
Examine the description of the PRODUCTS table:

Which two statements execute without errors?

  • A. MERGE INTO new_prices n
    USING (SELECT * FROM products WHERE cost>150) p
    ON (n.prod_id= p.prod_id)
    WHEN MATCHED THEN
    UPDATE SET n.price= p.cost*.01
    DELETE WHERE (p.cost<200);
  • B. MERGE INTO new_prices n
    USING (SELECT * FROM products WHERE cost>150) p
    ON (n.prod_id= p.prod_id)
    WHEN MATCHED THEN
    DELETE WHERE (p.cost<200)
  • C. MERGE INTO new_prices n
    USING products p
    ON (p.prod_id =n.prod_id)
    WHEN NOT MATCHED THEN
    INSERT (n.prod _id, n.price) VALUES (p.prod_id, cost*.01)
    WHERE (p.cost<200);
  • D. MERGE INTO new_prices n
    USING (SELECT * FROM products) p
    WHEN MATCHED THEN
    UPDATE SET n.price= p.cost* 01
    WHEN NOT MATCHED THEN
    INSERT(n.prod_id, n.price) VALUES(p.prod_id, cost*.01)
    WHERE(p.cost<200);

Answer: A,C


NEW QUESTION # 40
Which normal form is a table in if it has no multi-valued attributes and no partial dependencies?

  • A. Second normal form
  • B. Fourth normal form
  • C. First normal form
  • D. Third normal form

Answer: A


NEW QUESTION # 41
Examine the description or the BOOKS_TRANSACTIONS 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 <> NULL
    AND due_amount <> 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 due_amount !=NULL;
  • D. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
    FROM customers
    WHERE cust income_level !=NULL
    AND cust credit_level !=NULL;
  • E. 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;

Answer: E


NEW QUESTION # 42
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