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INFORMATICS PRACTICES CLASS XI Time allowed: 3 hours Note: (i) This question paper is divided into 3 sections (ii)Section A consists of 30 Marks. (iii)Section Bconsists of 20 marks. (iv)Section Cconsists of 20 Marks. (iv) Answer the questions after carefully reading the text. SECTION-A Maximum Marks: 70 1. Answer the following questions : a. Define each of the following: (a) Nibble (b) Byte (c) Kilo Byte (d) Giga Byte 2 b. State the basic units of the computer. Name the subunits that make up the CPU, and give the function of each of the 2 units. c. Differentiate between the compiler and interpreter. 2. d What is a computer virus? How can it affect your computer? 2. e Expand the following terms : 2 a) PDAs b) MICR c) DVD d) TFT 2. a. Which Graphical controls of JAVA can used to display multiple choices out of which more than one can be selected? 1 b. Suppose you want to scan your storage devices attached with your computer for virus infection . Suggest the type and 1 name of the software. c. What is Write Once Run Anywhere characteristics of Java? 2 d. How can you declare the variable in JAVA for the following:- 2 (i) If you want to store the employee no. of an employee. (ii) If you want to store the name of an employee. e. What is meant by E-learning. Suggest any two websites which can be used for E-learning. 2 f. What benefits (mention at least 2) does an e-business offer to an organization? 2 3. a. Define the following terms in respect of Relationdatabase