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CBSE Pre Board Class 10 2015 : Informatics Practices (Kendriya Vidyalaya (KV), N.I.T. Silchar)

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Satish Mishra
Hitkarni College of Engineering & Technology, Jabalpur
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KENDRIYA VIDYALAYA SANGATHAN, SILCHAR REGION CLASS XII PRE-BOARD EXAMINATION INFORMATICS PREACITES (065) Time allowed: 3 hours Maximum Marks: 70 Instructions: (i) (ii) 1. (a) (b) (c) (d) (e) (f) (g) 2. (a) (b) (c) (d) (e) (f) (g) 3. (a) (b) (c) (d) All questions are compulsory. Programming language : Java, SQL. Kavita transferred one file to one remote host at head office. Which protocol is used for this purpose. Which device is used to convert digital signals to analog and analog signals to digital signals. Arrange the following communication channels in ascending order of their data transmission rates. Ethernet Cable, Optical Fiber, Telephone Cable, Co-axial Cable Which of the following is not a characteristic of Open Source Software? Its source code is not available for modification It is owned by a company or an individual It can be downloaded from internet What is a MAC address? Write its example. Define the following. (i) Node (ii) Bps What is meant by network topology? Write the name of any 4 topologies. While working in Netbeans, Rajmeeta included a Listbox in the form. Now she wants the list of her friends' names to be displayed in it. Which property of Listbox control should she use to do this? What is the purpose of default clause in a switch statement? Which HTML tag inserts a horizontal straight line on a web page? How is <P> tag different from <BR> tag in HTML? How many times does the following loop execute? What is the value of num after the execution? int num=5; do { System.out.println( Hello world ); num--; }while (num>2); 1 1 1 1 2 2 2 1 1 1 1 2 Write a function in java that takes two numbers two numbers as input from textfields and displays their sum. 2 How are tags used in XML different from tags in HTML? Write 2 points. Mr.Ramesh has created a table SUPPLIER in the database. One of the fields in the table is city. Write the command to display city by avoiding duplication. Mr.Sunil created a table BOOK in MySQL. He forget to set the PRIMARY KEY for the table. Which command should he used to set it for the field Bid . 2 1 1 1 What is the purpose of the following query. SELECT COUNT(mark) FROM STUDENT Can a table have multiple PRIMARY KEY? Explain. 1 Page 1 of 4

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