A To Z Exams

Which of the following is not an SQL aggregate function?

AVG

SUM

MIN

MAX

CURRENT_DATE()

The "father" of MySQL is

Michael Widenius

Stephanie Wall

Sigmund Velin

Bill Joy

Sometimes the expression "select count(*)" will return fewer rows than the expression "select count(value)".

True

False

Mysql command line tool is used to show “how many rows are returned and how long SQL command took to execute”

True

False

Undetermined

Depend

Given an employees table as follows: emp_id emp_name 1 Brush 2 Jerrin what value will be return by below query ? Select count(*) from employees

none of the above

An outer join requires each record in the two joined tables to have a matching record.

True

False

None

Both

MySql | Which of the following is available in MySQL:

CREATE TRIGGER

CREATE SCHEMA

CREATE FAIRYLIGHTS

CREATE DATABASE

CREATE VIEW

Commands passed to the MySQL daemon are written in.

Your choice from Perl, PHP, Java or some other languages

the Structured Query Language

English

Swedish

How can we get the number of records or rows in a table?

Using COUNT

Using NUM

Using NUMBER

Both a and c above

Which SQL statement is used to insert a new data in a database?

INSERT INTO

UPDATE

ADD

INSERT NEW

Which of the following can add a row to a table?

Add

Insert

Update

Alter

How much storage space does DATETIME require?

4 bytes

2 bytes

8 bytes

1 byte

Internally information is held in tables. Which of these is NOT a valid format:

BDB

Isam99

MyIsam

Hash

InnoDb

What will happen at the end of the following sequence of SQL commands? BEGIN TRANSACTION DELETE FROM MYTABLE WHERE ID=1 DELETE FROM OTHERTABLE ROLLBACK TRANSACTION

The contents of OTHERTABLE will be deleted

The contents of both OTHERTABLE and MYTABLE will be deleted

The contents of OTHERTABLE will be deleted, as will be all the contents of MYTAB whoID is 1

The database will remain unchanged to all users except the one that executes these queries.

The database will remain unchanged

What kind of replication is supported by the MySQL server?

Multiple-master replication

Master to slave replication

Single file based clustering

MySQL doesn't support replication

Which is the default order of sort in ORDER BY clause?

Ascending

Descending

The “Mysql command line tool” formats are bounded by

+-|

+-*

+-/

+-}

MySQL comes with as standard with client libraries for:

C only

Java only

Java and C

Perl, PHP and C

With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?

DELETE FROM Persons WHERE FirstName = 'Peter'

DELETE ROW FirstName='Peter' FROM Persons

DELETE FirstName='Peter' FROM Persons

Which of the following is NOT supported by MySQL

Temporary (Hash) Tables

Table Joining

Stored Procedures

Regular Expression Matching

When do we use a HAVING clause?

To limit the output of a query

To limit the output of a query using an aggregate function only

When GROUP by is used

both b and c above

Which function used to get the current time in mysql?

getTime()

Time()

NOW()

What is DCL?

Data Control Language

Data Content Language

Data Column Language

Defined Control Language

Which of the following is the correct SQL statement to use to remove rows from a table?

DROP

REMOVE ROW

DELETE

DELETE ROW

Use the .............. to delete the data inside the table, and not the table itself?

DROP TABLE

DELETE TABLE

TRUNCATE TABLE

REMOVE TABLE

Can I call a trigger directly called from an application?

Yes

With SQL, how do you select all the records from a table named "Persons" where the "LastName" is alphabetically between (and including) "Hansen" and "Pettersen"?

SELECT LastName>'Hansen' AND LastName

SELECT * FROM Persons WHERE LastName BETWEEN 'Hansen' AND 'Pettersen'

SELECT * FROM Persons WHERE LastName>'Hansen' AND LastName

Which command is used for showing current date and time in Mysql command line tool?

select now()

SELECT now();

SELECT now()

None of these

With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" is "Peter"?

SELECT * FROM Persons WHERE FirstName='Peter'

SELECT [all] FROM Persons WHERE FirstName LIKE 'Peter'

SELECT [all] FROM Persons WHERE FirstName='Peter'

SELECT * FROM Persons WHERE FirstName'Peter'

Which of the following is not an SQL aggregate function?

AVG

SUM

MIN

MAX

CURRENT_DATE

What is the command for counting all the rows in a table in MySQL?

select count(*) from table_name

select * from table_name

select count * from table_name

select (count)* from table_name

How many distinct, different values can you hold in an enum field?

255

65535

2 (True and False)

With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" starts with an "a"?

SELECT * FROM Persons WHERE FirstName='%a%'

SELECT * FROM Persons WHERE FirstName LIKE '%a'

SELECT * FROM Persons WHERE FirstName='a'

SELECT * FROM Persons WHERE FirstName LIKE 'a%'

SELECT * FROM Persons WHERE FirstName='a'"

Which of these is a valid call to a function (watch the spaces carefully!)

CONCAT( A , B )

CONCAT ( A , B )

CONCAT( "A" , "B" )

CONCAT ( "A" , "B" )

What does the DESC keyword do in the following query? SELECT * FROM MY_TABLE WHERE ID > 0 ORDER BY ID, NAME DESC

It causes the dataset returned by the query to be sorted in descending order

It causes rows with the same ID to be sorted by NAME in ascending order

It causes rows with the same ID to be sorted by NAME in descending order

It causes rows to be sorted by NAME first and then by ID

It causes the result set to include a description of the NAME field

Which authentications are required for login into Mysql command line tool?

Username

Password

Only Username

Both a) and b)

SQL is not case sensitive. SELECT is the same as select.

True

False

What is an open source DBMS product that runs on UNIX, Linux and Windows

MySQL

JSP/SQL

JDBC/SQL

Sun ACCESS

On executing DELETE command, if you get an error "foreign key constraint" what does it imply?

Foreign key not defined

Table is empty

Connectivity issue

Data is present in the other table

Which of these is not a valid name for a column

From

Far

Near

Which SQL statement is used to return only different values?

SELECT DISTINCT

SELECT UNIQUE

SELECT DIFFERENT

SELECT DIFF

What is Table?

A table is a data storage structure with rows .

A table is a data storage structure with columns.

A table is a data storage structure with rows and columns.

None

Which of the following is NOT available in MySQL?

FETCH

REVOKE

JOIN

How much character are allowed to create database name?

mysql_pconnect() is used to make a persistent connection to the database which means a SQL link that do not close when the execution of your script ends.

True

False

The “Mysql command line tool” format the results in which of the following format:

Rectangle

Square

Sphere

None of these

What is Row?

A row is a unit of data with related data items stored as one item in multiple columns in a table

A row is a unit of data with related data items stored as multiple item in one column in a table

A row is a unit of data with related data items stored as one item in two columns in a table

A row is a unit of data with related data items stored as one item in one column in a table

Which of the following file extension is a valid MyISAM file extension?

.ism

.myd

.my

.mys

Which SQL statement is used to extract data from a database?

GET

Open

Extract

Select

Query

Primary Key does allow the Null Values. where as in Unique key doesn't accept the Null values.

False

True

What MySQL property is used to create a surrogate key in MySQL?

UNIQUE

SEQUENCE

Surrogate keys are not implemented in MySQL.

AUTO_INCREMENT

What MySQL property is used to create a surrogate key in MySQL?

UNIQUE

SEQUENCE

AUTO_INCREMENT

None of the above

How do I find out all databases starting with ‘test to which I have access to?

SHOW DATABASES LIKE ‘%test%’;

SHOW DATABASES LIKE ‘%test;

SHOW DATABASES LIKE ‘'test'%’;

SHOW DATABASES LIKE ‘test%’;

What is DDL?

Data Definition Language

Data Degenerated Language

Data Delivered Language

Defined Definition Language

Which command is used in Mysql command line tool to return to window command shell?

exit;

quit;

both a) and b)

only a)

MySQL is

A Programming language

A technique for writing reliable programs

A Relational Database Management System

Which of the following is used to delete an entire MYSQL database?

mysql_drop_database

mysql_drop_entiredb

mysql_drop_db

mysql_drop_dbase

Transactions are used to treat sets of SQL statements atomically.

True

False

Where is metadata stored in MySQL?

In the MySQL database metadata

In the MySQL database metasql

In the MySQL database mysql

None of the above is correct.

A table may be joined to itself.

True

false

No joing concepts in the table.

Which of the following is not a MySQL Operator?

Between..and..,

Like,

IN,

Is NULL

Which command is used for taking “server side help” in Mysql command line tool

None of these

Which SQL keyword is used to sort the result-set?

SORT

ORDER BY

ORDER

SORT BY

What's the difference between the DESCRIBE and SHOW FIELDS FROM commands?

Only SHOW FIELDS FROM can take a LIKE clause

Nothing - they're the same thing

Only DESCRIBE can take a LIKE clause

The program called mysql is

There isn't a program just called mysql

A wrapper through which Java clients must connect to the databases

A client program that lets you send SQL commands to the database engine

The database engine

A program that starts up and shuts down the database engine

A NULL value is treated as a blank or 0.

True

Fasle

None of the above

How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?

UPDATE Persons SET LastName='Hansen' INTO LastName='Nilsen'

UPDATE Persons SET LastName='Nilsen' WHERE LastName='Hansen'

MODIFY Persons SET LastName='Hansen' INTO LastName='Nilsen

MODIFY Persons SET LastName='Nilsen' WHERE LastName='Hansen'

MySQL supports the complete SQL99 standard

false

true

What is a candidate key?

Used to uniquely identify a row

Alias for primary key

Used to identify a column

Alias for foreign key

Which SQL statement is used to delete data from a database?

COLLAPSE

DELETE

MODIFY

REMOVE

Which command is used on Mysql command line tool to return to window command shell?

exit

exit;

exit()

exit();

Which of these field types would be best to hold a film title?

longblob

tinytext

mediumtext

longtext

________ is an open source DBMS product that runs on UNIX, Linux and Windows.

MySQL

JSP/SQL

JDBC/SQL

Sun ACCESS

Which of the following commands should be used to create a database named “student”?

CREATE ?I student

CREATE DATABASE student

DATABASE /student

DATABSE student

What is DML?

Data Maintained Language

Data mandatory Language

Data manipulation Language

Defined manipulation Language

You are required to buy a license for MySQL if

If you use it for longer than 30 days

You use MySQL in a live application and not just for evaluation

You incorporate it into a product that you sell

You use it on a publicly accessible site

You are never required to buy a license

Can joins be nested?

True

False

Which of the following is not a character manipulation function?

concat

substr

instr

coalesce

Which of the following DBMSs do not have a native PHP extension?

MySQL

IBM DB/2

PostgreSQL

Microsoft SQL Server

None of the above

What type of lock will deny users any access to a table?

EXPLICIT

IMPLICIT

EXCLUSIVE

Shared

READ ONLY

If you want to undo a GRANT, you should use

REVOKE

UNDO

UNGRANT

DELETE

ROLLBACK

Can I define multiple unique constraints on a table?

Yes

In a LIKE clause, you can ask for any 6 letter value by writing?

LIKE ??????

LIKE .{6} Answer 5: LIKE ^.{6}$

LIKE ...... (that's six dots)

LIKE ______ (that's six underscore characters)

Enum values are stored according to their index numbers

True

False

Which of the following ways below are the correct way to get the current date?

SELECT CURTIME();

SELECT CURDATE();

SELECT CURRENT_TIME();

All of above

One of the early proponents of relational database who laid down many of the principles we use to this day was:

Edgar Codd

Xigang Koi

Robert Langton

Mahatma Coate

William Crawford

A view is nothing but a ________ table or a stored query

Dymanic

Real

Virtual

Static

User() fucntion returns the current users user name and ___________

password

host name

both a and b above

database name associated with the user

BLOB data type can have default column value.

True

False

A user with RELOAD priveliges can

Can reset passwords for any mysql user account

Perform certain "admin type" operations such as flush table and logs from memory to disc, but can't normally do anything "dangerous"

Can repopulate the databases and tables from a backup

Can restart the MySQL daemon in addition to any other priveliges he might also have

In PHP in order to access MySQL database you will use:

mysqlconnect() function

mysql-connect() function

mysql_connect() function

sql_connect() function

Which SQL statement is used to update data in a database?

MODIFY

UPDATE

SAVE AS

SAVE

If you're writing a client using the C language API, your source code should include the following line at the top:

use mysql;

include ("mysql.h");

#include

import com.mysql.*;

With SQL, how do you select a column named "FirstName" from a table named "Persons"?

EXTRACT FirstName FROM Persons

SELECT FirstName FROM Persons

SELECT Persons.FirstName

Can DISTINCT command be used for more than one column?

Yes

With SQL, how can you insert "Olsen" as the "LastName" in the "Persons" table?

INSERT INTO Persons (LastName) VALUES ('Olsen')

INSERT ('Olsen') INTO Persons (LastName)

INSERT INTO Persons ('Olsen') INTO LastName

With SQL, how can you insert a new record into the "Persons" table?

INSERT INTO Persons VALUES ('Jimmy', 'Jackson')

INSERT ('Jimmy', 'Jackson') INTO Persons

INSERT VALUES ('Jimmy', 'Jackson') INTO Persons

A SELECT command without a WHERE clause returns?

All the records from a table that match the previous WHERE clause

All the records from a table, or information about all the records

SELECT is invalid without a WHERE clause

Nothing

How is structure of a table got in MySQL?

"show create table table_name";

"show insert table table_name";

"select table table_name";

"show update table table_name";

In a LIKE clause, you can could ask for any value ending in "qpt" by writing

LIKE %qpt

LIKE *ton

LIKE ton$

LIKE ^.*ton$

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Database - Sql Test

Test Instructions :

1. The Test is 1hr duration.

2. The Test Paper consists of 30 questions. The maximum marks are 30.

3. All the questions are multiple choice question type with three options for each question.

4. Out of the three options given for each question, only one option is the correct answer.

5. Each question is allotted 1 mark for each correct response.

6. 0.25 will be deducted for incorrect response of each question.

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