Kerala Plus One Answer Key 2025 Computer Science and Information Technology

ANSWER KEY FI RST YEAR HIGHER SECONDARY EXAMINATTON MARCH 2025 SUBIECT : COMPUTER SCIENCE AND INFORMATT0N TEGINoLoGy CODE NO : FY352 SCORE 60 an- Sub Answer KeylValue Points Score Total No ans Score PARI A(Answerany five) 1 b)Antivirus L 1 2 b) name_1 1 1 3 b) derived 1 t 4 c) stdio-h 1 1 5 c) Radio Yraves 1 l 6 c) artivirus 1 I PARI B (Anyeleven ) 7 (a) First Generation Comprter - Vacuum Thbe ,1 (b) Sec,:nd Geuerdim Compter - Tiansistm ,5 (c) Third genera[S Comprt* Integrared Cirtrdr rh 2 (d) Fou rth gen€ratbn Computer- Mcrroprocessor v, I Sigll magnitude, t's complemen! 2's complement (any trro) 1+1 2 I (a) ASCII -American Sadard Code for Information Interchange, 7 bit 1 , can t€present English alphabefs and symbols (any one valid point) o) EB{IDIC -Exended Binary Coded Decimal Interchange Code, 2 L I is an I bit code used in computers (any one valid point) I 10 Frredom to use, cqp5r, distribute, examine, change and improve 1 (any one valid poim) 2 Example-GNU/Linux, GIMP, Fire Fox, een0ffice-org (any nro) tA+tA tt Kqwords - slrcrt, long continue llt*5+ Idertifiers - Name ,, 2 may be grven if the giveu aII tokcns m written as identifiers) ,, L2 Alg,orithm - Step by step solving a problem I 1 Flowchart - gaphical representation of algorithm 2 1 13 Braphic character constirnts which cannot be tJrped direcdy from the 1 2 two examples 1L+15. L4 char, in! floag durble" void (any four) - explanation rhx4 2 r5 Data grpe modifier help us to atter the size, range and precision of a daa 1 2 - signed, unsignd shor! long (any two) %:+ri L6 one differcnce betrreen entr5r contmlled and exit cCIntrolled loopu 1 of each categoryr th+1A 2 t7 (a) Anay definitim 1 (b) int anayname[10]; 2 1 18 Any four %x4 2 19 Any nro 1+L 2

PARI C (Anyseven) 20 Symbol or explanation of three logic gues O& AND, NOT tfr+tA+ ,,1 Truth table of each logic gates 3 wrr:+ v, 2t Rqlster- explanation 1 Accumulator, MA& MBR,I& PC (anyfour) 3 %x4 22 Datir processing stages (auy six) *1xG 3 23 Structure of the algoritrm h algcritnn to read a nruuber and dreck whc*rcr it is odd or even I ti 3 Stucare of flowchart v5 I Florvchart to read and dreck wtrether is odd or even L 24 Synax of switch staremeil (with explanation) 2 Exanple 3 1 I 25 SrucAm of C+_r prryram 1 I 3 declare a variable and read a number 1 find factorial using a loop and print rresult 1 26 (a) Syntax / explanation l uample of srqyQ I 3 o) Synax / erylanation / example of sncurpQ 1 (c) Synax / exptanatim / example of snlen$ I fl 27 Twistedpai4 cqafral cable, optical fibre - erplanation 1+1+1 3 28 (a) sparr unsolicited emails- explanation 1 (b) hacking - mryassing computer netrrrorks erplmration - L (c) phis,hing-acquire informations by pming as the original website - 3 I PARI D (Anyftree) 29 (r) (1010101) {85}ro 1 (ii) (96.rro=(1ffiXXD): 1 (iii) (ABCld2748h, $ 4 t_ (Iv) (l2ti)ro=(2ffi)a 7 30 (a) Exp'lanation of >, <, )=, (=, :, != (any four) 2 (b) Exp'lanation of pre andpostimement operatos 4 2 31 Stnrcnre of C+rFogram 1 array declaration I 4 rearling the arrey ,rsing a loop 1 fio.iing the sum and print result 1 I 32 (a) Coruparison of LAN and W{N (any truo) 2 4 (b) Explanation of dient senyrer arctritecue 1 (c) moderr -oonversion of digital sigrul to anlq andviceversa I 33 (a) SMS - Short Message Service explanation (b) MNIS - Multimedia Messaging- Service Erylan*ion 1 - 1 (c) GPli - Global Poeitioning System - Explanadon 1 4 (d) Sm rrt cards used in SIM of GSM phone- - I I l.t,o C.L. q4461 osz4e $enoa?t Q+t1nsaqr6t B^rrd; G tury 9ze&Bo e8\7