CBSE Class 8 Computer Science Sample Paper Set D

CBSE Class 8 Computer Science Sample Paper Set D. It’s always recommended to practice as mane sample papers as possible before the examinations. Students can download the sample papers and also question papers of previous years to practice and score better marks in examinations. Refer to other links too for more sample papers.

1. Answer  the  following questions briefly 

: (1) How are  single tab  queries useful?

(2)  Explain  the  use  of WHERE·clause  in  SQL.

(3)  How  can  we maintain  col4mn integrity  of any  table?

2. Identify  the  valid  field names  from  the  following 

: "cust_id" , Address,  cust-id, order_number

3. List  errors  (if any)  in the  following SQL 

statements  : (1) Select from Movie  * 

(2)  Select  Name  from Movie where  Movie_id  2

4. Briefly  describe the advantages  of  DBMS.

5. Name  the  following datatypes  :

(a)  This  field  is  set  to·handle  a  Yes/No, True/False input. . 

(b)  This  field  accepts integers  with  a  fixed  length  of ten spaces.

6.  Explain  the  role  of a  Database  administrator .  (2)

7.  Consider  the  following table  and  write  SQL commands for  the  following  to : 

Table  :  Items

No  Product  Price  Supplier Stock

1  Motherboard  7000  Intel  20

2  Keyboard  1000  TVSE  70

3  Mouse  500  Logitech  60

4  Soundcard  600  Samsung  ...  50

5  Speaker  600  Samsung  25

6  Monitor  3000  Philips  22

7  CD-ROM  2800  Creative  32

8  Printer  7900  HP  10

(1)  Display  Product, Supplier Name  &  Price of  all  the  Items.

(2)  Display No, name  of  all  the  products where stock  is morethan  50.'

(3)  Display  Product of  Supplier  -  "Samsung".

(4) Display records of all the products  who arehaving  Supplier=  "Samsung" and Stock=50.  .. 

(5)  Display records of  all  the  products who  are  having  stock between  10 and 50..

{ 6)  Display all  records with  Product-Motherboard, Monitor,.Printer 

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