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Guide for PostgreSQL CE 8 Silver

Quiz PostgreSQL CE 8 Silver

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Quiz

1/10
Argument1
SQL statements were executed in the following order. CREATE TABLE book (id VARCHAR(21),
title TEXT NOT NULL, price INT, UNIQUE (id), CHECK (price > 0) );
INSERT INTO book VALUES ('4-12345-678-9', 'SQL book', 2300); --(1) INSERT INTO book (title,
price) VALUES ('PostgreSQL', 3000); --(2) UPDATE book SET id = '4-12345-678-9' WHERE id IS NULL;
--(3)
DELETE FROM book WHERE price < 0; --(4)
While executing, select the first location that generates an error.
Select the answer
1 correct answer
A.
(1)
B.
(2)
C.
(3)
D.
(4)
E.
No error is generated.

Quiz

2/10
Argument5
Select two incorrect statements regarding 'DOMAIN'.
Select the answer
2 correct answers
A.
When defining a domain, you can add a default value and constraints to the original data.
B.
Domain is a namespace existing between databases and objects such as tables.
C.
A domain is created by 'CREATE DOMAIN'.
D.
A domain can be used as a column type when defining a table.
E.
To define a domain, both input and output functions are required.

Quiz

3/10
Argument0
I would like to be able to save log entries as shown below. Select a correct configuration setting
from statements below.
LOG: connection received: host=[local] port=
LOG: connection authorized: user=postgres database=test
Select the answer
1 correct answer
A.
log_connections = true
B.
log_hostname = true
C.
syslog = true
D.
log_authorization = true
E.
log_min_level = log

Quiz

4/10
Argument3
What does the following command do? Choose the most appropriate statement from the
selection
below.
Note: $ is the command prompt.
$ pg_dump postgres > pgsql
Select the answer
1 correct answer
A.
Writes a backup of the database postgres to the file pgsql.
B.
Writes a backup of the entire database cluster using user postgres to the file pgsql.
C.
Backs up the database postgres and writes an error message to the file pgsql.
D.
Writes a backup of the entire database cluster to the file postgres and writes an error message to
the file pgsql.
E.
Outputs all of the content of the database postgres to the screen using the user pgsql.

Quiz

5/10
Argument2
Select two correct statements about the command shown below. Note: $ is the command




prompt. $ vacuumdb -az
Select the answer
2 correct answers
A.
Recovers unused areas from all of the databases.
B.
Collects statistical information related to the table content for all of the databases.
C.
Processes the job equivalent of the VACUUM FULL command for all of the databases.
D.
Processes the job equivalent of the VACUUM VERBOSE command for all of the databases.
E.
The database can not be accessed until this command is finished.

Quiz

6/10
Argument4
The tables "t1" and "t2" are defined below.
The tables "t1" and "t2" have columns "id" which are type of INTEGER and column "name"s which
are type of TEXT.
t1
t2
The following SQL command was executed. Select the number of rows in the result. SELECT *
FROM t1 NATURAL FULL OUTER JOIN t2;
Select the answer
1 correct answer
A.
2 rows
B.
3 rows
C.
4 rows
D.
5 rows
E.
6 rows

Quiz

7/10
Argument1
The present time is noon of July 7th, 2007, and the result of the following
SQL sentence was '2007-07-17 12:00:00'.
Select the correct expression to fill in the blank below.
SELECT CURRENT_TIMESTAMP::timestamp + ________________ ;
Select the answer
1 correct answer
A.
'10 day'::timestamp
B.
'10 day'::interval
C.
10::day
D.
8640000::time
E.
age(8640000)

Quiz

8/10
Argument5
Select one incorrect statement from the below about a database cluster.
Select the answer
1 correct answer
A.
It is possible to have multiple databases within a database cluster.
B.
A database cluster is created usinginitdb command.
C.
Each host can have only one database cluster.
D.
Special databases called template0 and template1 are created in a database cluster by default.
E.
When a database cluster is created, a databasesuperuser is registered using the username of the
OS at the time of creation unless otherwise designated.

Quiz

9/10
Argument0
Select one incorrect description regarding the following SQL statement defining a function.
CREATE OR REPLACE FUNCTION get_file_list(TEXT, BOOLEAN)
RETURNS SETOF TEXT LANGUAGE C STRICT SECURITY DEFINER AS 'myfuncs.so';
Select the answer
1 correct answer
A.
This function may bedefined in 'myfuncs.so'.
B.
This function can return multiple rows.
C.
This SQL statementdefines a function written in the C language.
D.
If this function is called with a NULL parameter, it will return 0 when executed.
E.
This functionoperates with the authority of the user who executed it.

Quiz

10/10
Argument3
Select two statements that the command below DOES NOT do.
Note: $ is the command prompt. $ pg_dump -b -F c b > d
Select the answer
2 correct answers
A.
Backs up the "b" database to the "c" file, and stores error messages to the "d" file.
B.
Backs up the "b" database to the "d" file.
C.
Backs up large objects.
D.
Backs up the "c" database to the "d" file as the "c" user.
E.
Creates a backup, which is restorable with thepg_restore command.
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