CBSE Class 12 Informatics Practices Question Paper All India with answers 2017 (1)

CBSE Class 12 Informatics Practices Question Paper All India with answers 2017 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

1. (a) Identify the odd one out of the following : 

Optical Fiber/Coaxial Cable/Bluetooth/Twisted Pair Cable Give reason for your answer.

(b) How is it easier to diagnose fault in Star topology than in Bus topology ?

(c) What is the purpose of logical address of computer ? 

(d) Does open source software only mean that the software is free of cost ? Give reason for your answer. 

(e) Which of the following are valid IP addresses ? Give reason(s) if invalid. 

(i) 121.23.1.45 (ii) 192.168.0.254 (iii) 192.168.0.1 (iv) 198.-1.1.1

2. (a) Write the value that will be assigned to variable x after executing the following statement : 

 x = 20 – 5 + 3 * 20/5;

(b) Consider the statement :

choice = ‘Y’; What is the datatype of variable choice ? Write a Java statement to declare the variab‘e 'choice'. 

(c) While working in Netbeans IDE, Amit wants that the text in a Text area should move to the next line without breaking the word. Which properties would help him to do that ?

(d) Write a Java statement to : 

Append a string "ABC" to the text that is already in the text area named jTextArea1.