COMMON HALF YEARLY EXAMINATION DECEMBER 2018

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1 li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net.pds.pds COMMON HALF YEARLY EXAMINATION DECEMBER 2018 STD : XI SUBJECT: COMPUTER SCIENCE TIME : 2.30 Hrs TOTAL MARKS: 70 KEY ANSWER.Pdsli.Net.Pdsli.Net 1. C) Fifth 2. B) C 3. B) Both 4. C) iii 5. A) Mrk shuttle worth 6. C) 3 7. B) m=7, n=-8 8. C) C++ hs not function librry 9. C) goto 10. A) bse-exponent 11. A) Structure vrible 12. B) (i) nd (ii) only 13. C) void fun(double d); void fun(chr ch) 14. D) clss student : public school 15. B) Intellectul property theft.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net PART-A 15X1=15 PART-B 6X2= Add : Subtrct : Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net 17. Security mngement Fetures in Os. (1) File ccess level (2) System level (3) Network level.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net Pdsli.Net.Pdsli.Net Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net ww.pdsli.net ww.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 1.Pds.Pds 18. Logoff from Ubuntu OS: When you hve finished working on your computer, you cn choose to Log Out, Suspend or Shut down through the Session Indictor on the fr right side of the top pnel..pdsli.net.pdsli.net 19. Abstrction: A problem cn involve lot of detils. Severl of these detils re unnecessry for solving the problem. Only few detils re essentil. Abstrction is the process of hiding or ignoring the detils irrelevnt to the tsk so s to model problem only by its essentil fetures..pdsli.net.pdsli.net 20. While loop: 3,6,9,12 30.Pdsli.Net.Pdsli.Net While(i=3<31) cout<< i; i=i+3; 21. Syntx of 2-D Arry: Two-dimensionl (2D) rrys re collection of similr elements where the elements re stored in certin number of rows nd columns..pdsli.net.pdsli.net An exmple m n mtrix where m denotes the number of rows nd n denotes the number of columns. Exmple: int rr[3][3];.pdsli.net.pdsli.net 22. Disdvntge of OOP: Size Effort Speed.Pdsli.Net.Pdsli.Net 23. Difference b/w Public nd Privte: Public: Privte:.Pdsli.Net.Pdsli.Net 24. Digitl signture:.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pds.pds Members under specifier cn ccessed from Outside. Members under specifier cnt ccessed from Outside..Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net Digitl signtures re bsed on symmetric cryptogrphy nd cn provide ssurnces of evidence to origin, identity nd sttus of n electronic document, trnsction or messge, s well s cknowledging informed by the signer..pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net Kindly Downlod From -.Pdsli.Net - Originl Eductionl Website - Avoid Duplicte Websites. ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 2

2 li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net.pds.pds 25. Differentite opticl nd Lser Mouse. Opticl Mouse Mesures the motion nd ccelertion of Pointer..Pdsli.Net.Pdsli.Net It uses light source insted of bll to judge the motion of the pointer. Opticl mouse hs three buttons..pdsli.net.pdsli.net Opticl mouse is less sensitive towrds surfce. PART-C 6X3=18 Lser Mouse Mesures the motion nd ccelertion of pointer. Lser Mouse uses Lser Light. Lser mouse hs three buttons Lser Mouse is highly sensitive nd ble to work on ny hrd surfce. 26. Mobile OS: A Mobile operting system controls mobile device nd its design supports wireless communiction nd different types of mobile pplictions. i. Google Android ii. Apple ios iii. Blckberry iv. Symbin.Pdsli.Net.Pdsli.Net 27. Procedure to Renme file..pdsli.net.pdsli.net 1. Select the File or Folder you wish to Renme. 2. Click File Renme. 3. Type in the new nme. 4. To finlise the renming opertion, press Enter Procedure to sve file Type the contents in the workspce nd sve the file using File Sve or Ctrl + S..Pdsli.Net.Pdsli.Net 28. Cse Anlysis: Alterntive sttement nlyses the problem into two cses. Cse nlysis sttement generlizes it to multiple cses..pdsli.net.pdsli.net 29. Cse nlysis splits the problem into n exhustive set of disjoint cses. For ech cse, the problem is solved independently. Logicl error.pdsli.net.pdsli.net A Progrm hs not produced expected result even though the progrm is grmmticlly correct. Progrm is grmmticlly correct, but it contins some logicl error..pdsli.net.pdsli.net Semntic error is lso clled s Logic Error. ww.pdsli.net ww.pdsli.net.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net Syntx error.pdsli.net.pdsli.net.pds.pds Syntx is set of grmmticl rules to construct progrm..pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net Syntx errors occur when grmmticl rules of C++ re violted. EX:.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net cout << Welcome to Progrmming in Control flow C++ Input/output Error: End of the bove sttement ; is missing. Kindly Downlod From -.Pdsli.Net - Originl Eductionl Website - Avoid Duplicte Websites. ww.pdsli.net ww.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 3.Pds.Pds 30. Explin: strct() strupr() strlwr().pdsli.net.pdsli.net 31. Modulriztion: Modulristion: Softwre re-use: 32. Chrcteristics of constructors: - This function tkes two rguments. (To join two strings) - To convert the given string into Uppercse letters. - To convert the given string into Lowercse letters. Where the progrm cn be decomposed into modules. Where progrm cn be composed from existing nd new modules. The nme of the constructor must be sme s tht of the clss No return type cn be specified for constructor A constructor cn hve prmeter list The constructor function cn be overloded They cnnot be inherited but derived clss cn cll the bse clss constructor The compiler genertes constructor, in the bsence of user define.pdsli.net.pdsli.net.pdsli.net.pdsli.net 33. Function Overloding: The bility of the function to process the messge or dt in more thn one form is clled s function overloding. Function overloding mens two or more functions in the sme scope shre the sme nme but their prmeters re different. In this sitution, the functions tht shre the sme nme re sid to be overloded nd the process is clled function overloding..pdsli.net.pdsli.net PART-D 5X5= Chrcteristics of Microprocessor. A Microprocessor s performnce depends on the following chrcteristics:.pdsli.net.pdsli.net ) Clock speed b) Instruction set c) Word size.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ) Clock Speed Every microprocessor hs n internl clock tht regultes the speed t which it executes instructions. The speed t which the microprocessor executes instructions is clled the clock speed. Clock speed is mesured in MHz (Meg Hertz) or in GHz (Gig Hertz)..Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net b) Instruction Set A commnd which is given to computer to perform n opertion on dt is clled n instruction. Bsic set of mchine level instructions tht microprocessor is designed to execute is clled s n instruction set. This instruction set crries out the following types of opertions: Dt trnsfer Arithmetic opertions Logicl opertions.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 4

3 li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net.pds.pds c) Word Size The number of bits tht cn be processed by processor in single instruction is clled its word size. Word size determines the mount of RAM tht cn be ccessed by microprocessor t one time nd the totl number of pins on the microprocessor. Totl number of input nd output pins in turn determines the rchitecture of the microprocessor..pdsli.net.pdsli.net Windows nd Ubuntu icons..pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net S.No Windows Ubuntu 1 Recycle Bin Trsh 2 My computer Files 3 Ms word Libreoffice writer.pdsli.net.pdsli.net 35. Given two glsses mrked X nd Y. Glss X is full of pple drink nd glss Y is full of grpe drink. For exchnging the contents of glsses X nd Y, represent the stte by suitble vribles, nd write the specifiction of the lgorithm. Solution: Exchnge (X, Y).Pdsli.Net.Pdsli.Net --Inputs: --Outputs: t:=x X:=Y Y:=t Recursive problem solving: X, Y re integers, X 0, Y 0 X, Y re Integers,.Pdsli.Net.Pdsli.Net.Pds.Pds.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pds.Pds.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net Ech solver should test the size of the input. If the size is smll enough, the solver should output the solution to the problem directly. If the size is not smll enough, the solver should reduce the size of the input nd cll sub-solver to solve the problem with the reduced input..pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 5.Pds.Pds Fctoril of nturl number recursively. The fctoril of number is the product of ll the integers from 1 to tht number. For exmple, the fctoril of 4 (denoted s 4!) is 1*2*3*4= 24. Fctoril (4) i = 1, f = 1; = f = 1 x 1= 1 = f = 1 x 2= 2 = f = 2 x 3= 6 = f = 6 x 4= 24.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net 36. Use of Binry opertors: Binry Opertors - Require two opernds C++ Opertors re clssified s: (1) Arithmetic Opertors (2) Reltionl Opertors (3) Logicl Opertors (4) Bitwise Opertors (5) Assignment Opertors (6) Conditionl Opertor.Pdsli.Net.Pdsli.Net (1) Arithmetic Opertors.Pdsli.Net.Pdsli.Net Arithmetic opertors to perform simple rithmetic opertions like ddition, subtrction, multipliction, division etc., (2) Reltionl Opertors.Pdsli.Net.Pdsli.Net Reltionl opertors re used to determine the reltionship between its opernds. When the reltionl opertors re pplied on two opernds, the result will be Boolen vlue i.e 1 or 0 to represents True or Flse respectively..pdsli.net.pdsli.net (3)Logicl Opertors.Pds.Pds A logicl opertor is used to evlute logicl nd reltionl expressions. The logicl opertors ct upon the opernds tht re themselves clled s logicl expressions..pdsli.net.pdsli.net C++ provides three logicl opertors..pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net Kindly Downlod From -.Pdsli.Net - Originl Eductionl Website - Avoid Duplicte Websites. ww.pdsli.net ww.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 6

4 li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net.pds.pds (4)Bitwise Opertors Bitwise opertors work on ech bit of dt nd perform bit-by-bit opertion. In C++, there re three kinds of bitwise opertors, which re:.pdsli.net.pdsli.net (i) Logicl bitwise opertors (ii) Bitwise shift opertors (iii) One s complement opertors (5)Assignment Opertor: Assignment opertor is used to ssign vlue to vrible which is on the left hnd side of n ssignment sttement..pdsli.net.pdsli.net = (equl) is commonly used s the ssignment opertor in ll computer progrmming lnguges. This opertor copies the vlue t the right side of the opertor to the left side vrible. It is lso binry opertor..pdsli.net.pdsli.net (6) Conditionl Opertor: In C++, there is only one conditionl opertor is used.?: is conditionl Opertor. This is Ternry Opertor. This opertor is used s n lternte to if else control sttement..pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net Control Sttement:.Pds.Pds.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net Control sttements re sttements tht lter the sequence of flow of instructions. In progrm, sttements my be executed sequentilly, selectively or itertively. Every progrmming lnguges provides sttements to support sequence, selection (brnching) nd itertion..pdsli.net.pdsli.net.pdsli.net.pdsli.net If the Sttements re executed sequentilly, the flow is clled s sequentil flow..pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net In some situtions, if the sttements lter the flow of execution like brnching, itertion, jumping nd function clls, this flow is clled s control flow. The sequentil sttement re the sttements, tht re executed one fter nother only once from top to bottom. These sttements do not lter the flow of execution. These sttements re clled s sequentil flow sttements. They re lwys end with semicolon (;)..Pdsli.Net.Pdsli.Net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 7.Pds.Pds.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net 1) The selection sttement mens the sttement (s) re executed depends upon condition. If condition is true, true block ( set of sttements) is executed otherwise flse block is executed. This sttement is lso clled decision sttement or selection sttement. 2) Itertion Sttement (looping) is use to execute set of sttements repetedly until condition is stisfied. If condition evlutes to true, the set of sttements (true block) is executed gin nd gin. This is lso known s looping sttement or itertion sttement..pdsli.net.pdsli.net 3) Jump Sttement re used (1) goto (2) brek (3) continue.pdsli.net.pdsli.net 37. Cll by vlue Cll by vlue method copies the vlue of n ctul prmeter into the forml prmeter of the function. In this cse, chnges mde to forml prmeter within the function will hve no effect on the ctul prmeter. Exmple Progrm:.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net Output :.Pdsli.Net.Pdsli.Net.Pds.Pds.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net #include<iostrem> using nmespce std; void disply(int x) int =x*x; cout<<"\n\n The Vlue inside disply function ( * ):"<<; int min() int ; cout<<"\n\n Enter the Vlue for A :"; cin>>; disply(); cout<<"\n\n The Vlue inside min function "<<; return(0);.pdsli.net.pdsli.net.pdsli.net.pdsli.net Enter the Vlue for A : 5 The Vlue inside disply function ( * ) : 25 The Vlue inside min function 5.Pdsli.Net.Pdsli.Net Kindly Downlod From -.Pdsli.Net - Originl Eductionl Website - Avoid Duplicte Websites. ww.pdsli.net ww.pdsli.net ww.pdsli.net ww.pdsli.net ww.pdsli.net ww.pdsli.net ww.pdsli.net ww.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 8

5 li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net li.net i.net.pds.pds Types of Inheritnce: There re different types of inheritnce viz., Single Inheritnce, Multiple inheritnce, Multilevel inheritnce, hybrid inheritnce nd hierrchicl inheritnce..pdsli.net.pdsli.net 1. Single Inheritnce When derived clss inherits only from one bse clss, it is known s single inheritnce 2. Multiple Inheritnce.Pdsli.Net.Pdsli.Net When derived clss inherits from multiple bse clsses it is known s multiple inheritnce 3. Hierrchicl inheritnce When more thn one derived clsses re creted from single bse clss, it is known s Hierrchicl inheritnce..pdsli.net.pdsli.net 4. Multilevel Inheritnce The trnsitive nture of inheritnce is itself reflected by this form of inheritnce. When clss is derived from clss which is derived clss then it is referred to s multilevel inheritnce..pdsli.net.pdsli.net 5. Hybrid inheritnce When there is combintion of more thn one type of inheritnce, it is known s hybrid inheritnce. Hence, it my be combintion of Multilevel nd Multiple inheritnce or Hierrchicl nd Multilevel inheritnce or Hierrchicl, Multilevel nd Multiple inheritnce..pdsli.net.pdsli.net 38. Debug Progrm: Output Progrm : #include<iostrem> #include<conio.h> clss A public: int 1,2,3; void getdt() 1=15; 2=14; 3=13; ; clss B:: public A.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net ww.pdsli.net ww.pdsli.net.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 9.Pds.Pds Output: public: void func() int b1,b2,b3; A::getdt(); b1=1; b2=2; b3=3; cout<<b1<< \t <<b2<< t\ <<b3; ; int min() clrscr() B der; der.func(); getch(); return 0;.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net M.VIJAYA KUMAR, MCA.,M.Phil.,B.Ed.,PGDCA., PGT-COMPUTER TEACHER,.Pds.Pds.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net V.SUJITHA, MCA.,M.Phil., PGT-COMPUTER TEACHER, SASTRA MATRICULATION HIGHER SECONDARY SCHOOL,.Pdsli.Net.Pdsli.Net Enter vlues for nd b (smple dt 6 nd 7) The two integers re. 6 7 The sum of the vribles = 13.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net.Pdsli.Net ww.pdsli.net ww.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net KILPENNATHUR, TIRUVANNAMALAI Pdsli.Net.Pdsli.Net Mobile No : Emil : vijy28soft@gmil.com +1 & +2 Computer Science Complete Mteril.Pdsli.Net.Pdsli.Net Click here Kindly Downlod From -.Pdsli.Net - Originl Eductionl Website - Avoid Duplicte Websites. ww.pdsli.net ww.pdsli.net.pds.pds.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net.pdsli.net ww.pdsli.net ww.pdsli.net Sstr Mtric.Hr.Sec.School, Kilpennthur, Tiruvnnmli 10