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Oracle 1Z0-007 Exam Syllabus Topics:

Oracle Introduction to Oracle9i: SQL Sample Questions:

Question 1

Which substitution variable would you use if you want to reuse the variable without prompting the user each time?

A. &
B. ACCEPT
C. &&
D. PROMPT

Question 2

You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows.
Which statement is valid?

A. ALTER TABLE commercials
MODIFY (description CHAR2(2000));
B. ALTER TABLE commercials
CHANGE (description VARCHAR2(2000));
C. You cannot increase the size of a column if the table has rows.
D. ALTER TABLE commercials
MODIFY (description VARCHAR2(2000));
E. ALTER TABLE commercials
CHANGE (description CHAR2(2000));

Question 3

You would like to display the system date in the format "Monday, 01 June, 2001".
Which SELECT statement should you use?

A. SELECT TO_CHAR(SYSDATE, 'FMDY, DDD Month, YYYY') FROM dual;
B. SELECT TO_CHAR(SYSDATE, 'FMDay, DD Month, YYYY') FROM dual;
C. SELECT TO_DATE(SYSDATE, 'FMDAY, DD Month, YYYY') FROM dual;
D. SELECT TO_CHAR(SYSDATE, 'FMDD, DY Month, 'YYYY') FROM dual;
E. SELECT TO_DATE(SYSDATE, 'FMDY, DDD Month, YYYY') FROM dual;

Question 4

Evaluate the SQL statement:
SELECT LPAD (salary,10,'*')
FROM EMP
WHERE EMP_ID = 1001;
If the employee with the EMP_ID 1001 has a salary of 17000, what is displayed?

A. 17000.00
B. ****170.00
C. **17000.00
D. 17000*****
E. an error statement

Question 5

Examine the description of the MARKS table:

SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects.
Examine this SELECT statement based on the MARKS table:
SELECT subj1+subj2 total_marks, std_id
FROM marks
WHERE subj1 > AVG (subj1) AND subj2 > AVG(subj2)
ORDER BY total_marks;
What is the result of the SELECT statement?

A. The statement returns an error at the WHERE clause.
B. The statement returns an error at the SELECT clause.
C. The statement returns an error at the ORDER BY clause.
D. The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.

Solutions: