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Published on: 25/10/2025
Download CBSE Class 12th Standard CBSE Computer Science question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Computer Science
Questions + Answers key
Take MCQ Computer Science Test
1 Marks
1.
What are all the domain names possible in gender?
2.
What is database scheme?
3.
Who was developed Hierarchical model?
4.
Which type of relationship does support by network model?
5.
What is primary key?
6.
Write an example of hierarchical database.
7.
Explain the degree of table.
8.
What is DB-API?
9.
What is the use of DB-API?
10.
What is MySQLdb?
11.
Can one DB-API be used for all database types
12.
What is a database connection?
13.
How is a database connection established?
14.
What is a cursor
15.
Write a checklist before connecting to a database?
16.
What is a query result set?
17.
Differentiate between fetchone() and fetchall() methods.
18.
How and why do use SQL Server?
19.
What is the default port for MySQL Server?
20.
Is there an object-oriented version of MySQL library functions?
21.
Which key word is used to sort the records of a table in descending order?
22.
Which clause is used to sort the records of a table?
23.
Which command is used to modify the records of the table?
24.
Which clause is used to remove the duplicating rows of the table?
25.
Which declaration doesn't use the same number of bytes and consumption of bytes depend on the input data?
26.
Which declaration represents that "character data will consume the same number of bytes as declared and is right padded"?
27.
The maximum length of the char columns is ____ .
28.
MySQL supports different character sets, which command is used to display all character sets?
29.
Character data can be stored as____ .
30.
What will happen if the data being loaded into a text column exceeds the maximum size of that type?
31.
"Numeric Data" is used to store
32.
What is the default format for "Datetime" & "Timestamp" data type?
1 Marks
1.
( )
Male and Female
2.
( )
The design of the database is known as the database scheme
3.
( )
The Hierarchical model was developed by IBM in 1968.
4.
( )
Network model supports many to many relationship.
5.
( )
A primary key is a set of one or more attributes that can uniquely identify the relation.
6.
( )
SYSTEM2000 is an example of hierarchical database
7.
( )
The degree of the table denotes the number of columns.
8.
( )
DB-API is a Python standard for database interfaces. It supports a wide range of database servers such as Gadfly, mSQL, MySQL, Oracle, Sybase etc.
9.
( )
The DB-API provides a minimal standard for working with databases using Python structures and syntax wherever possible. It includes the following
(i) Importing the API module
(ii) Acquiring a connection with the database
(iii) Issuing SQLstatements and stared procedures.
(iv) Closing the-connection.
10.
( )
MySQLdb is an interface for connecting to a MySQL database server from Python
11.
( )
No, You need to download separate DB-API for each database you need to access
12.
( )
A database connection is a mean to communicate form of the script to a database program.
13.
( )
Each database module needs to provide a connect function that returns a connection object. The parameter that are passed to connect vary by the module and what is required to communicate with the database
14.
( )
A cursor is a Python object that enables you to work with the database. In dataset terms, the cursor is positioned at a particular location within a table or tables in a database.
15.
( )
Before connecting to a MySQL database make sure
(i) Youhave created a database
(ii) Youhave created a table
(iii)This table has fields
16.
( )
A result set is an object that is returned when a cursor object is used to query a table.
17.
( )
| fetchone() | fetchall() |
It is used to fetch a single record. It fetches next row of a query result set. resultset. |
fetchall () is used to fetch multiple values. It fetches all the rows in a resultset . If some rows have already been executed from the result set, then it retrieves the remaining rows from the result set. |
18.
( )
SQL Server is free which means anyone can download and use it. The application uses SQL (Structured Query Language), and it is easy to use.
19.
( )
The default port for MySQL Server is 3306. Another standard default port is 1433 in TCP/IP for SQL Server.
20.
( )
Yes. MySQL library is the object-oriented version of MySQL, and it interfaces in PHP but not Python.
21.
( )
DESC
22.
( )
ORDER BY
23.
( )
UPDATE
24.
( )
DISTINCT
25.
( )
Varchar
26.
( )
Char
27.
( )
255 bytes
28.
( )
SHOW CHARACTERSET
29.
( )
Either Fixed or Variable length string
30.
( )
Data will be truncated
31.
( )
Both Whole and Natural numbers_____ .
32.
( )
YYYY-MM-DDHH:MI:SS
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