8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Database Technologies(DBT) Mock CCEE

Total points 17/40

Email *

yogeshwaribulbule@gmail.com

0 of 0 points

Name *

Yogeshwari Gajanan Bulbule

Mobile No *

781040756

From which CDAC Centre are you? *

CDAC Mumbai(Kharghar)

Untitled section 2 of 5 points

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which column attribute enables the generation of sequential numbers 1/1

automatically for identification?

AUTO_INCREMENT

UNSIGNED

IDENTIFY

DESCRIBE

When you see SQL statements to create or modify the structure of a 1/1
database, SQL is being used as :

a Data Manipulation Language(DML)

a Database Management Solution(DBMS)

a Data Definition Language(DDL)

a Data Control Language(DCL)

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which of the following is a wrong statement? 0/1

A subquery can be nested with another subquery

We can use subquery in clauses such as SELECT, INSERT, UPDATE, DELETE

A MySQL subquery is called an inner query while the query that contains the
subquery is called an outer query

A subquery cannot return more than one value

Correct answer

A subquery cannot return more than one value

Which of the following is a wrong statement? 0/1

WITH CHECK OPTION in view is applicable only for updatable views.

Different views can be created on the same table for different users.

A view can hide the complexity that exists in multiple table join.

We cannot use WITH CHECK OPTION while creating a view.

Correct answer

We cannot use WITH CHECK OPTION while creating a view.

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which index maintenance task discards the entire index and recreates it? 0/1

Refresh

Remake

Reorganize

Rebuild

Correct answer

Rebuild

Untitled section 3 of 5 points

Which of the following is a correct statement? 0/1

When compared to relational databases, NoSQL databases are more scalable and
provide superior performance.

Non-Relational databases require that schemas be defined before you can add
data.

NoSQL databases are built to allow the insertion of data with a predefined
schema

SQL Server is a type of NoSQL Database

Correct answer

When compared to relational databases, NoSQL databases are more scalable and
provide superior performance.

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

What is the purpose of a foreign key? 1/1

Foreign keys are the unique identifier for the table

Foreign keys refer to the primary key in another table to link the two tables
together

Foreign keys refer to a foreign key in another table to link the two tables together

Foreign keys are used to update a row in a table

A query that is execute inside of another query is called as _______ 1/1

Embedded Query

Subquery

Secondary Query

Join Query

Which operator is used to test whether or not a value lies within a specific 1/1
range?

LIKE

BETWEEN

IN

FOR

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

How can a constraint be placed on a table where a field will contain the 0/1
value "Rohan" if nothing is provided?

CREATE TABLE People(FirstName TEXT CONSTRAINT "Rohan", address TEXT);

CREATE TABLE People(FirstName TEXT DEFAULT "Rohan", address TEXT);

CREATE TABLE People(FirstName TEXT DEFAULT("Rohan"), address TEXT);

CREATE TABLE People(FirstName TEXT DEFAAULT= "Rohan", address TEXT);

Correct answer

CREATE TABLE People(FirstName TEXT DEFAULT "Rohan", address TEXT);

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The names of columns can be altered in a query's result by using the 0/1
____________ keyword.

NAMED

RENAME

ALIAS

AS

Correct answer

AS

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Identify the wrong statement from the following: 0/1

Primary key cannot hold NULL values

Unique Key can hold NULL values

A Primary Key in a table can be referred to as a Foreign Key in another table

One or more fields can be declared as a unique key

Correct answer

Unique Key can hold NULL values

How many primary keys can we have in an MySQL table? 1/1

Only 1

Only 2

Depends on no of Columns

Depends on DBA

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

To iterate the cursor and return more documents, which one of the 0/1
following keyword in the mongo shell would we type?

Cursor

it

next

more

Correct answer

next

Which of the following is a wrong statement? 0/1

In MongoDB, field names cannot start with the dollar sign ($) character

In MongoDB, field names cannot contain dot(.) character

BSON documents cannot have more than one field with the same name

BSON is a serialization format encoding format for JSON

Correct answer

BSON documents cannot have more than one field with the same name

Untitled section 1 of 5 points

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Identify the correct statement from the following: 0/1

We cannot use where clause with DELETE comand.

TRUNCATE command delete all rows of a table in one go:

DELETE command is comparatively faster than TRUNCATE command

In case of DROP statement, we can restore the table using ROLLBACK

statement

Correct answer

TRUNCATE command delete all rows of a table in one go:

What does "OPEN cursor_name" statement would do when working with 1/1
cursors in MYSQL (cursor_name is any string value eg: OPEN
rowsToProcess)

Opens a previously declared cursor

Fetches the next row for the SELECT statement associated with the specified
cursor

Declares a cursor

Closes a cursor

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

To get all the rows that are common in both tables based on the condition 0/1
specified, use ______________.

Self Join

Inner Join

Outer Join

Full Join

Correct answer

Inner Join

In MySQL, if you would like to throw your own exceptions, you can do so by 0/1
changing SQLSTATE using _______________ keyword.

SIGNAL

SQLEXCEPTION

DECLARE

END

Correct answer

SIGNAL

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which of the following is not a NoSQL database? 0/1

SQL server

MongoDB

Cassandra

Hbase

Correct answer

SQL server

Untitled section 1 of 5 points

How are transactions handled within a database? 0/1

Failed operations are ignored, and the transaction continues with the
successful operations

if any of the operations fails, then those operations are flagged for review at the end
of the transaction.

If any of the operations fails, then the entire group of operations is deleted from the
database?

if any of the operations fails, then the entire group of operations fail.

Correct answer

if any of the operations fails, then the entire group of operations fail.

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which of the following is a wrong statement? 0/1

MySQL removes the temporary table automatically when the session ends or
the connection terminated

A temporary table is only available and accessible to the client

A temporary table can have the same name as a normal table in a database.

MySQL does not support Temporary Table

Correct answer

MySQL does not support Temporary Table

For which of the following MySQL Triggers are not supported? 1/1

delete

update

insert

views

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

When you use an aggregate function without a groupby clause, how many 0/1
results do you expect?

One

Two

Zero

All the records in a table

Correct answer

One

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Two tables are defined as table1 and table 2 below: 0/1

What will the output when the below query is executed ?
SELECT table1.upperbirth, table2.lowerbirth FROM table1 JOIN table2 on
table1.id=table2.id

Option 1 Option 2

Option 3 Option 4

Correct answer
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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Option 1

Untitled section 2 of 5 points

Which code returns the only column pgdac, pgdbda and pgdesd from the 0/1
cdac table?

SELECT pgdac, pgdbda, pgdesd FROM cdac;

SELECT pgdacpgdbdapgdesd FROM cdac;

SELECT * from cdacpgdac, pgdbda,pgdesd;

SELECT *, pgdac, pgdbda, pgdesd FROM cdac;

Correct answer

SELECT pgdac, pgdbda, pgdesd FROM cdac;

Identify the correct statement from the following: 0/1

LIKE clause can work with only one operator %

LIKE clause cannot work with operator _

LIKE clause can work with two operators % and _

LIKE clause can work with operators % and ?

Correct answer

LIKE clause can work with two operators % and _

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which of the these tasks can you accomplish using SQL as a DML? 1/1

Inserting a record into the table

Deleting the database

Allowing a new user access to read data from a table

Removing a column from a table

What is the difference between a PRIMARY KEY and a UNIQUE KEY? 0/1

Primary key can store null value, where as a unique key cannot store null value

Primary key has unique and not null value, where as a unique key has unique values

Primary key cannot be a date variable whereas unique key can be

Primary key has unique values whereas a unique key has unique and not null
value

Correct answer

Primary key has unique and not null value, where as a unique key has unique values

Which of the below is not a valid TCL command? 1/1

SAVEPOINT

COMMIT

ROLLBACK

REVOKE

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Untitled section 4 of 5 points

Which of the following is not a MySQL Storage Engine? 1/1

MyISAM

InnoDB

CSV

FEDERAL

What is the latest SQL server version? 1/1

SQL Server 2021

SQL Server 2020

SQL Server 2022

SQL Server 2019

Which of the following is a wrong statement? 0/1

MySQL cursor is by default asensitive

An insensitive cursor performs faster than an asensitive cursor

MySQL cursor is read-only

MySQL cursor is non-scrollable

Correct answer

An insensitive cursor performs faster than an asensitive cursor

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

What is a complex view? 1/1

A view that is created from only one table

A view that is created from more than one table

A view that does not contain groups of data

A view that is used to update the data in the tables

Which of the following is the correct IF statement syntax? 1/1

IF boolean_expression { statement_block} FI

IF boolean_expression START { statement_block} END

IF boolean_expression BEGIN{ statement_block} END

IF boolean_expression START { statement_block} FI

Untitled section 3 of 5 points

The standard user and application program and statement interface(API) 1/1
of a relational database is the

Structured Query Language

Sequential Query Language

Relational Query Language

Standard Query Language

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

Which of the following function returns the current date and time? 1/1

CURRENT_TIMESTAMP

TIMESTAMP

CURDATE

CURTS

Which of the following command is used to insert data into collection in 1/1
MongoDB?

db.COLLECTION_NAME.update(document)

db.COLLECTION_NAME.insert(document)

db.COLLECTION_NAME.create(document)

db.COLLECTION_NAME.insertOne(document)

Which syntax is followed by MySQL for stored routines? 0/1

SQL:2000

SQL:2003

SQL:2005

None of the above

Correct answer

SQL:2003

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8/24/22, 11:29 PM Database Technologies(DBT) Mock CCEE

The ___command can be used to show the metadata regarding the table 0/1
created.

SHOW

EXPLAIN

FIND

DESC

Correct answer

DESC

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