CBSE Class 12 Informatics Practices Sample Paper 2012 (3)

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CBSE Class 12 Informatics Practices Sample Paper 2012 (3). 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.

Section - A

Q 1. Answer the following questions

(a) Explain the following terms:

i. UNICODE

ii. GNU

(b) Distinguish between open source software and proprietary software with respect to customizability of software.

(c) Explain the term Client Server Computing using suitable example.

(d) Write the tasks done when "Maintenance" is conducted once the system is implemented during System Development Life Cycle?

(e) Expand UML. Write its purpose.

Q2 Answer the following questions

(a) How do we restrict duplicate rows in SQL SELECT Query? Give example 

(b) Define SQL Functions. Explain Single Row Functions and its subcategories giving examples in each category.

(c) Differentiate between Row Level Triggers and Statement Level Triggers using suitable example.

Q3 Answer the following questions

 (a) Distinguish between Single document Interface and Multiple Document Interface.Give one example of both the types.

(b) Differentiate between System Defined and User Defined functions in Visual Basic. Define a function funCheckNumeric() to check for validity of a numeric value passed as argument to the function. The function will return True if the value is numeric else will return False.

(c) Define the term Common Dialog Box. Explain the process to include and a Common Dialog Box in a Visual Basic form and write the code fragment to show File Open Dialog when mnuFileNew is clicked.

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