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Code d'Examen: 310-081
Nom d'Examen: SUN (Sun Certified Web Component Developer for J2EE 1.4)
Questions et réponses: 140 Q&As
Code d'Examen: 310-814
Nom d'Examen: SUN (MySQL 5.0, 5.1 and 5.5 Certified Associate Exam)
Questions et réponses: 240 Q&As
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NO.1 Which of the following provides reliable units of work that allow correct recovery from failures and
keeps a database consistent even in cases of system failure?
A. Database security B.
Two-phase commit C.
Concurrency control
D. Database transaction
Answer: D
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NO.2 You work as a Database Administrator for a company. The company uses MySQL as the
database platform. You have created a table named Students in the database. The structure of the table is
as follows:
Stu_IDNUMBER (3) PRIMARY KEY
Stu_NameVARCHAR2 (25) NOT NULL
Fee NUMBER (8, 2)
Class NUMBER (5);
You have executed the following statement for the table "Students":
SELECT e.Stu_Name, m.Fee
FROM Students e, Students m
WHERE e.Stu_ID = m.stu_ID;
Which of the following join types have you used in the above statement?
A. Cross join
B. Equijoin
C. Self join
D. Outer join
Answer: C
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NO.3 Which of the following statements is correct for equijoin used to join two tables named Employees and
Department?
A. SELECTDept_Name, Emp_Name
FROM Departments d1, Employees e1
ORDER BY Dept_Name, Emp_Name;
B. SELECTD.Dept_Name, E.Emp_Name
FROM Departments d1, Employees e1
HAVING Dept_Name, Emp_Name;
C. SELECTE.Emp_Name,
D. Dept_Name
FROM Departments d1, Employees e1
WHERE Dept_No = Dept_No
ORDER BY Dept_Name, Emp_Name;
E. SELECTDept_Name, Emp_Name
FROM Departments d1, Employees e1
WHERE d1.Dept_No = e1.Dept_No
ORDER BY Dept_Name, Emp_Name;
Answer: D
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NO.4 You work as a Database Administrator for a company. The company uses MySQL as its database.
You have created two tables named Employees and Departments in the database. Now, you want
to display data from both tables. Which of the following actions will you perform to accomplish the task?
A. Join
B. Table Merge operator
C. HAVING
D. GROUP BY
Answer: A
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NO.5 Review the following ER diagram:
Which of the following SQL statements will return all rows for a given CUST_ID and PROD_ID
where sales of specific products on a given day are greater than 10?
Additionally the list should be ordered by CUST_LAST_NAME, CUST_FIRST_NAME and
PROD_NAME.
A. SELECTa.cust_last_name, a.cust_first_name, b.prod_name, c.time_id
FROM customers a, products b, times c, sales e
WHERE a.cust_id=e.cust_id
AND b.prod_id=e.prod_id
AND c.time_id=e.time_id
B. GROUP BYa.cust_last_name, a.cust_first_name, b.prod_name, c.time_id
HAVING COUNT(*) > 10
ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id;
C. SELECTa.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*)
FROM customers a, products b, times c, sales e
WHERE a.cust_id=e.cust_id
AND b.prod_id=e.prod_id
AND c.time_id=e.time_id
GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id
HAVING COUNT(*) > 10;
D. SELECTa.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*)
FROM customers a, products b, times c, sales e
WHERE a.cust_id=e.cust_id
AND b.prod_id=e.prod_id
AND c.time_id=e.time_id
GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id
HAVING COUNT(*) > 10
ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id;
E. SELECTa.cust_last_name, a.cust_first_name, b.prod_name, c.time_id, COUNT(*) TOTAL
FROM customers a, products b, times c, sales e
WHERE a.cust_id=e.cust_id
AND b.prod_id=e.prod_id
AND c.time_id=e.time_id
GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id
ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id;
F. SELECTa.cust_last_name, a.cust_first_name, b.prod_name, c.time_id,
COUNT(*) TOTAL
FROM customers a, products b, times c, sales e
WHERE a.cust_id=e.cust_id
AND b.prod_id=e.prod_id
AND c.time_id=e.time_id
AND total > 10
GROUP BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id
ORDER BY a.cust_last_name, a.cust_first_name, b.prod_name, c.time_id;
Answer: C
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NO.6 Which of the following will be true about a table column if you plan to create an index on that
column?
Each correct answer represents a complete solution. Choose all that apply.
A. The column is often used in the WHERE clause of SQL statements.
B. The column contains very small number of NULL values.
C. The table is updated frequently.
D. The column should contain a wide range of values.
Answer: A,D
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NO.7 Which of the following functions can be performed by a view?
Each correct answer represents a complete solution. Choose all that apply.
A. Restrict a user to specific columns in a table.
B. Contain a sub query in the FROM clause.
C. Join columns from multiple tables, so that they look like a single table.
D. Restrict a user to specific rows in a table.
Answer: A,C,D
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NO.8 Adam works as a Database Administrator for a company. He creates a table named Students. He wants
to create a new table named Class with the help of the Students table. Which of the
following syntaxes will Adam use to accomplish the task?
A. CREATE TABLE Class
INSERT INTO SELECT * FROM Students;
B. CREATE TABLE Class
FROM SELECT * FROM Students;
C. CREATE TABLE Class
(SELECT * FROM Students);
D. CREATE TABLE Class
AS SELECT * FROM Students;
Answer: D
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