CBSE Class 12 Informatics Practices Sample Paper 2012 (2)

CBSE Class 12 Informatics Practices Sample Paper 2012 (2). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers. 

Q 1. Answer the following questions: 

(a) Expand the following abbreviations: 

i) OSS 

ii) GNU

iii) W3C 

iv) FOSS 

(b) Compare Front end and Back end with respect to software. 

( c) Give one example to show how Data Mining is useful. 

(d) Write the purpose of feasibility study conducted during System Development Life Cycle. 

(e) Identify the type of relationship represented by the following statements and draw an entity relationship diagram to show it."Each item must have one and only one price. Each price may be for more than one item" 

Q2 Answer the following questions: 

(a) Write names of any two popular Relational Database Management Systems. 

(b) Define SQL. List three subcategories of SQL commands giving one example of command in each category. 

(c) Distinguish between Decision Control and Looping Control Structure giving one example each of commands provided by PL/SQL for both these types of control structures. 

Q3 Answer the following questions: 

(a) What is an Event? Name an Event Driven programming language. 

(b) Differentiate using a suitable example, between MsgBox () and InputBox () functions in Visual Basic. 

(c) Differentiate between ADODB project reference and ADO DC in a form using suitable Example

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