CBSE Computer Science sample paper class XII 2008

http://www.cbseguess.com/-------------------------------------------------------------------------------------------------------www.cbseguess.com Other Educational Portals www.icseguess.com | www.ignouguess.com | www.dulife.com | www.magicsense.com Sample Paper – 2008 Class – XII Subject – Computer Science Time allowed : 3 hrs. Maximum Marks : 70 Note: (i)All questions are compulsory. (ii) Programming Language: C++ (iii) Total Pages: 10 1. (a) Name the header file to which the following belong : 1 (i) gotoxy() (ii) flushall() (b) Illustrate the use of inline function in C++ with the help of an example. 2 (c) Rewrite the following program after removing the syntactical error(s) if any, underline each correction. 2 #include void main() { int s1,s2,num; s1 = s2 = 0; for(x=0;x<11;x++) { cin< 0) s1 += num; else s2 = /num; } cout< #include void ChangeContent(int Arr[], int Count) { for(int C=1 ; C int modify(int temp = 2) { if(temp % 3 == 0) temp = temp + 1; else temp = temp + 3; return temp; http://www.cbseguess.com/-------------------------------------------------------------------------------------------------------www.cbseguess.com Other Educational Portals www.icseguess.com | www.ignouguess.com | www.dulife.com | www.magicsense.com } void doupdation(int m, int &n) { static int i; i++; m = n + i; if(n > 10) n = modify(); else n = modify(n); cout<>no_of_ppl; } void showdata() { cout<<”Colony Number : “; puts(c_no); cout<<”Colony Name : “; puts(c_name); cout<<” No. of peoples : “<=400; vii). Select Book_Name, Author_Name from books where Publishers = „First‟; viii). Select min(Price) from books where type = „Text‟; http://www.cbseguess.com/-------------------------------------------------------------------------------------------------------www.cbseguess.com Other Educational Portals www.icseguess.com | www.ignouguess.com | www.dulife.com | www.magicsense.com 6 (a) State Distributive Law and verify the same using truth table. 2 (b) Write the Product of Sums form of the function G(U,V,W), truth table representation of G is as follows : 2 (c) Write the equivalent Boolean Expression for the following Logic Circuit. 2 (d) Reduce the following Boolean Expression using K-Map 2 F(A,B,C,D) = ∑ ( 0 , 3 , 4 , 5 , 7 , 11 , 13 , 15) 7. (a) Write one advantage and disadvantage of Optical Fiber 1 (b) Expand the following terms with respect to Networking. 2 i). CDMA ii). GSM iii). SMTP iv). FTP (c) What is Website and what is Home Page? 1 U V W G 0 0 0 1 0 0 1 1 0 1 0 0 0 1 1 0 1 0 0 1 1 0 1 1 1 1 0 0 1 1 1 0 Y X OR AND http://www.cbseguess.com/-------------------------------------------------------------------------------------------------------www.cbseguess.com Other Educational Portals www.icseguess.com | www.ignouguess.com | www.dulife.com | www.magicsense.com (d) PNC Private Ltd. Has four branches in Udaipur city named as “Head Office”, “Marketing Office”, “Clearance Office” and “Service Office”. PNC Company wants to establish the networking between all the four offices. 4 A rough layout of the same is as follows: Approximate distances between these offices as per network survey team are as follows: Place From Place To Distance Head Office Marketing Office 20 m Marketing Office Clearance Office 200 m Clearance Office Service Office 40 m Head Office Service Office 270 m Marketing Office Service Office 80 m Head Office Clearance Office 90 m In continuation of the above, the company experts have planned to install the following number of computers in each of their offices: Head Office 20 Marketing Office 100 Clearance Office 40 Service Office 60 i). Suggest cable layout(s) for connecting the offices. ii). Marketing office is used for many critical operations. It is tried that each PC gets maximum possible bandwidth. Which network device should be used for this? iii). Where would you suggest the placement of server? iv). The company also has another office out of city but at a distant location about 50-55 km away. How can link be established with this office ( i.e. suggest the transmission medium)? Head Office Marketing Office Clearance Office Service Office