CBSE Class 12 Informatics Practices Sample Paper 2011 (2)

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CBSE Class 12 Informatics Practices Sample Paper 2011 (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.

Section – A

Q 1. Answer the following questions

(a) Explain the following terms:

i. UNICODE

ii. GNU

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

(c) What does Object Oriented Modeling Technique mean? Why do we use UML?

(d) Explain the term Data Dictionary, Data Warehousing, Data Mining and Meta Data using suitable

Examples.

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) Define the term Errors. Give any two general types of Errors with respect to visual basic error object.

(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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