CBSE Class 12 Informatics Practices Question Paper 2013 Delhi Set 01

CBSE Class 12 Informatics Practices Delhi Question Paper 2013 (1). Students can download the last year question papers using the link below.Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

SECTION A

1. Answer the following questions :

(a) Define Data Warehousing and explain its usage. 

(b) What do you understand by the term SDLC ? Name its essential components. 

(c) Explain the term Front End Tool and Back End Tool in the context of software development process. 

(d) What is the Entity Relationship Model ? Explain the concept of ER Model using the case study of a School that has three entities : Student, Teacher and Subject. Assume that each student can study more than one subject while each teacher can teach only one subject. 

2. Answer the following questions :

(a) What are conditional or decision control statements ? Name the two conditional statements used in Visual Basic. 

(b) Differentiate between public and private variables and discuss their scope of visibility. 

(c) Explain the terms ODBC and OLE-DB. 

(d) Differentiate between SDI Form and MDI Form in Visual Basic. In the Similar context, explain the concept of parent and child forms.

3. Answer the following questions :

(a) Differentiate between DML and DCL giving suitable example in each case. 

(b) What is NULL value ? What is the result of an arithmatic operation containing NULL value ? 

(c) What is the use of a Sub-Query ? Which query gets executed first, the parent query or the sub query ? 

(d) Which PL/SQL command is used to display an output on the screen ? Also name the command used to enable the server output option before using the above command. 

(e) Differentiate between Row-level and Statement-level triggers in PL/SQL.

Please click the link below to download pdf file of CBSE Class 12 Informatics Practices Delhi Question Paper 2013 (1).