SURA BOOKS OCTOBER Choose the most appropriate answer : [75 1 = 75] (1) PART-I

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1 OCTOBER [Time : 3 hours] XII STD COMPUTER SCIENCE (With Answers) [Marks : 150] PART-I Choose the most appropriate answer : [75 1 = 75] 1. What value is stored in the variable c, if a = 5; c = a++; a) 5 b) 6 c) 0 d) In Star Office Base which option is used to specify if the user should always enter a value for that field? a) Entry Required b) Default value c) Length d) Format 3. Which coloured squiggly underline is used for the words that do not match with the words in the dictionary in StarOffice Writer? a) Blue b) Green c) Red d) White 4. Which of the following command is used to print the presentation? a) File Print b) Edit Print c) Tools Print d) Format Print 5. Which of the following act as place holders in the function prototype in C++? a) variables b) typedef c) character d) enumerator 6. In StarOffice Calc, in Page style Dialog Box which Check Box should be clicked to print a worksheet with gridlines? a) Sheet b) Page c) Grid d) Format 7. The default top and bottom margins are in how many inches in StarOffice Writer. a) 1.25 b) 0.5 c) 1 d) Which key is used to end the presentation? a) Ctrl b) Alt c) Delete d) Esc 9. Which is the illegal access to the network or computer system? a) Ethics b) Virus c) Software d) Cracking 10. Which command is used to hide a slide? a) Tools Show/Hide Show b) Tools Hide Show c) Format Hide Slide d) Slide Show Show/Hide Slide (1)

2 2 Sura s XII Std Computer Science 2016 October Question Paper with Answers 11. Expansion of GIF: a) Graphic Information Format b) Graphic Interchange Format c) Graphic Interchange File d) Graphic Information File 12. In C++ the body of the class is terminated by: a) : b) :: c) () d) ; 13. Which of the following displays the fields of a record in a well - spaced out manner? a) Table b) Form c) Report d) Query 14. Which of the following function copies Source String to Target String? a) Stringcopy () b) Strcpy() c) Strcmp() d) Strcpy() 15. Which one of the following is called the entrycheck loop in C++? a) do..while b) while c) continue d) break 16. Which one of the following is the multiple branching statement in C++? a) Switch b) if c) while d) do..while 17. In C++, which one of the following braces is used to enclose the body of a class? a) () b) c) [] d) < > 18. Which of the following is executed in the order of inherited class? a) Polymorphism b) Destructor c) Constructor d) Function 19. Making and using duplicate hardware and software is called : a) Virus b) Ethics c) Piracy d) Cracking 20. Which is a telephone based shared service center for a specific customer activities? a) Data Management b) Call Center c) Digitization d) Morphing 21. Which one of the following process to join the data from more than different tables in a Database? a) Sorting b) Filter c) Searching d) Merging 22. Which of the following is the extension of shockwave format? a).snd b).swf c).snf d).swd 23. Which of the following sign is used to make the cell address absolute in StarOffice Calc? a) # b) & c) $ d) % 24. Which one of the following in C++ is memory box that hold values or constants? a) punctuators b) keywords c) constants d) variables

3 Sura s XII Std Computer Science 2016 October Question Paper with Answers In C++ the mechanism of giving special meaning to an operator is called : a) Function Overloading b) Operator Overloading c) Constructor Overloading d) Destructor Overloading 26. Which of the following is used to uniquely identify a record in a database table? a) Field b) Record c) File d) Primary Key 27. In C++ which statement would exit the current loop only? a) for b) switch c) struct d) break 28. Which of the following is the most powerful feature of an Objected Oriented Programming language? a) Class b) Abstract c) Constructor d) Inheritance 29. Which of the following is a named set of defaults for formatting text? a) Style b) Formatting c) Font type d) Points 30. How many copy of the member variable is created for static data members in C++? a) One b) Two c) Three d) Four 31.Which command is used to change the column width of a Worksheet in StarOffice Calc? a) Format Width Column b) Format Column Height c) Format Height Column d) Format column width 32. In C++ a collection of variables of the same type is : a) Function b) Operators c) Pointer d) Array 33. When a derived class inherits only from one base class it is known as : a) Single Inheritance b) Multiple Inheritance c) Multilevel Inheritance d) Hybrid Inheritance 34. How many kinds of loops are there in C++? a) four b) three c) two d) five 35. In StarOffice Calc which of the following bar is used to display the current cell and its contents? a) Function b) Object c) Formula d) Status 36. How many field types are there in StarOffice Base? a) 10 b) 20 c) 30 d) In StarOffice Writer which button is used to add the word to the dictionary? a) Add b) Replace c) Insert d) Suggestions

4 4 Sura s XII Std Computer Science 2016 October Question Paper with Answers 38. Expansion of DBMS : a) Data Base Management System b) Data Base Memory System c) Data Base Memory Storage d) Device Based Memory Storage 39. Which one of the following reduces software complexity? a) Polymorphism b) Inheritance c) Object d) Class 40. In StarOffice Writer which command is used to insert more than one row in the table? a) Table Insert Rows b) Format Insert Rows c) Tools Insert Rows d) File Rows Insert 41. In C++ which of the following is a special function that cannot be overloaded? a) Constructor b) Destructor c) Operator d) Function 42. In C++ which one of the following is used as prefix to destructor? a) ~ c)! d) # 43. In C++ which of the following operator when overloaded through a member function take one explict argument? a) Unary b) Ternary c) Binary d) Function 44. In StarOffice Writer, the flashing vertical bar is called : a) Pointer b) Operators c) Insertion Point d) Key 45. Which one of the following is used to construct C++ basic statements? a) Symbols b) Operators c) Tokens d) Functions 46. The functions that return no value in C++ is declared as : a) main b) cout c) cin d) void 47. In StarOffice Writer which command is used to insert page numbers in each page? a) Format Fields Page Number b) View Fields Page Number c) Tools Insert Page Number d) Insert Fields Page Number 48. In which year, Real Audio / Real Video format was developed? a) 1981 b) 1995 c) 1982 d) Integral data promotion in C++ is purely what oriented? a) Object b) Computer c) Calculator d) Compiler

5 Sura s XII Std Computer Science 2016 October Question Paper with Answers Reducing the frame count to less than how many frames per second causes the video to look jerky? a) 40 b) 15 c) 20 d) In C++ Member functions are called : a) Access specifier b) Attributes c) Methods d) Operator 52. The name C++ was coined by : a) Dennis Ritchie b) Dan Bricklin c) Rick Mascitti d) Bjarne Stroustrup 53. Whic key is used to make the selected text bold in StarOffice Writer? a) Ctrl + A b) Ctrl + B c) Ctrl + C d) Ctrl + D 54. In StarOffice Impress which of the following command is used to open Media Player Window? a) View Media Player b) Format Media Player c) Tools Media Player d) Insert Media Player 55. In C++ which function execute faster but require more memory space? a) cinline b) inline c) outline d) coutline 56. Which function is used to find square root of a given number in StarOffice Calc? a) SQUARE() b) ROOT() c) SQRT() d) SQR() 57. In C++, which one of the folowing is called scope resolution operator? a) :: b) &? c)?: d) & 58. Which key is used to move the insertion point to the beginning of the line in StarOffice Writer document? a) Alt + Home b) Shift + Home c) Ctrl + Home d) Home 59. Which of the following operator is used to combine sections of text in StarOffice Calc? a) : b) & c)! d) $ 60. Which view allows to view miniature images of all the slides in the presentation? a) Slide Sorter b) Normal c) Notes d) Outline 61. The number of an element in the array int a [2] [4]; a) 4 b) 6 c) 8 d) The First Electronic Spread Sheet : a) Lotus b) VisiCalc c) Excel d) Improve 63. Which of the following database consists of single data table? a) Relational b) Flat - File c) Object Oriented d) Hierarchical 64. How many storage specifiers are there in C++? a) One b ) Two c) Three d) Four 65. A category of IT enabled services pertaining to collection, digitization and processing of data coming from various source is : a) Tele - Medicine b) Website Service c) e - Governance d) Data Management

6 6 Sura s XII Std Computer Science 2016 October Question Paper with Answers 66. Information is : a) Set of Processed Constant b) Set of Processed Data c) Set of processed Command d) Set of Processed Operator 67. In C++ which of the following operator is used to access the members of a class? a) dot (.) b) Semicolon (;) c) Comma(,) d) Colon (:) 68. In C++ which access specifier is used to access the members only from within the class? a) Private b) Protected c) Public d) Static 69. Which is the technique of distorting a single image to represent something else? a) Morphing b) Animating c) Modeling d) Warping 70. Which of the following function gets executed when an instance of a class comes into scope? a) Method b) Arguments c) Destructor d) Constructor 71. In C++ which function removes the memory of an object which was allocated by the constructor? a) Pointer b) Destructor c) Copy Constructor d) Modifier 72. Expansion of CBT : a) Common Business Tool b) Calculator Based Tools c) Computer Based Tutorials d) Computer Based Tools 73. In StarOffice Base, each row in a table represents : a) File b) Field c) Record d) Data 74. Which permits banking from the comfort of the home by using Internet facilities? a) e - Learning b) e - Shopping c) e - Banking d) e - Governance 75. Which one of the following increases the functionality of a derived class and promo reusability of the base class? a) Encapsulation b) Inheritance c) Polymorphism d) Object PART-II Answer any twenty questions in one or two sentences each : [20 2 = 40] 76. What is text editing? 77. What is meant by autospell check icon? 78. Can we change the data present in a cell? If so, how? 79. List the type of cell referencing in StarOffice Calc. 80. What is Primary Key? Give example. 81. What is form? 82. What is Compression? Explain the types. 83. Write short note on MIDI format. 84. How to insert and delete slide in Presentation? 85. How to start custom slide show in Presentation? 86. Define Object?

7 Sura s XII Std Computer Science 2016 October Question Paper with Answers Write note on conditional operator in C Write about typedef wth example. 89. Write down the impact of modifiers in C++? 90. Write note on nested if statement. 91. What are the types of scope of variables in C++? 92. Write short note on strlen() with example. 93. What is Matrix? 94. Define Class. 95. Write note on (1) Data Members (2) Member functions. 96. What is meant by operator overloading?. 97. What are the functions of constructor? 98. List the types of inheritance. 99. Write note on e - Governance What is Virus? PART-III Answer any seven questions. [7 5 = 35] 101. Write the steps involved in search and replacing a given text in StarOffice Writer In StarOffice Writer what are the various functions of the icons in the table formatting toolbar? 103. Explain how to insert objects in StarOffice Calc List the advantages of using electronic spreadsheet Explain the types of databases Explain loops with suitable example in C Explain inline function with suitable example Define function overloading. List the rules of function overloading Debug the following C++ program to get the following output : output Program : # include (iostream. h) # include < conio.h > class A public; int a1,a2:a3; Void getdata[] a1=3; a2=3;a3=5; Class B:: public A() PUBLIC void func()

8 8 Sura s XII Std Computer Science 2016 October Question Paper with Answers int b1:b2:b3; A::getdata[]; b1=a1; b2=a2; a3=a3; cout<<b1<<'\t'<<b2<<'\t'<<b3; void main() clrscr(); B der; der1:func(); getch(); 110. Find the output for the following C++ program. #include<iostream. h> #include<conio.h> class sample private: int a, b; public: sample() a=b=0; ]]]] cout<<"\nconstructor of class sample"; ; ~sample() cout<<"\ndestructor of class sample"; void assign() a=25; b=85; void display() void main() cout<<"\nthe two integers are" <<a<<'\t'<<b; cout<<"\nthe sum of integers"<<a+b; sample obj; cout<<"\n Object"; obj.assign(); obj.display();

9 Sura s XII Std Computer Science 2016 October Question Paper with Answers 9 Answers PART - I 1. (a); 2. (a); 3. (c); 4. (a); 5. (a); 6. (b); 7. (c); 8. (d); 9. (b); 10. (d); 11. (b); 12. (d); 13. (b); 14. (b); 15. (a); 16. (a); 17. (b); 18. (c); 19. (c); 20. (b); 21. (d); 22. (b); 23. (c); 24. (d); 25. (b); 26. (d); 27. (d); 28. (d); 29. (a); 30. (a); 31. (d); 32. (d); 33. (a); 34. (b); 35. (c); 36. (b); 37. (a); 38. (a); 39. (a); 40. (a); 41. (b); 42. (a); 43. (c); 44. (c); 45. (c); 46. (d); 47. (d); 48. (b); 49. (d); 50. (b); 51. (c); 52. (d); 53. (b); 54. (c); 55. (b); 56. (c); 57. (a); 58. (c); 59. (c); 60. (a); 61. (c); 62. (b); 63. (b); 64. (d); 65. (d); 66. (b); 67. (a); 68. (b); 69. (d); 70. (d); 71. (b); 72. (c); 73. (c); 74. (c); 75. (b). PART -II 76. Entering a new text or modifying the existing text in a document is known as text editing. 77. StarOffice Writer will automatically correct some spelling mistakes. StarOffice Writer recognises some common misspellings and typographical mistakes and makes the replacement automatically using auto correction option. E.g: If a word is typed as teh StarOffice Writer automatically replaces this with the correct word the. 78. To edit the contents in a cell the ways are : (i) Type in the new data. The new data will simply overwrite the old contents of the cell. (ii) Click on the formula bar with the mouse, press the F2 function key or simply double-click on the cell. A vertical cursor appears on the formula bar. Move the cursor to the left using the left arrow key or the backspace key and edit the data. 79. The two types of cell referencing are : (i) Relative cell addressing, (ii) Absolute cell addressing. 80. A primary key is a key that uniquely identifies a record in a database table. In relational database, a primary key can consist of one or more fields. Example : In a mark list table regno is primary key since it uniquely identifies a student record. 81. A form is simply a screen that displays the fields of a record in well-spaced out manner. Forms are user defined screens that are used to make it easier to enter, view and edit the data in a table or a query. 82. Compression is a technique by which a recurring set of information is identified and replaced by a single piece of information.

10 10 Sura s XII Std Computer Science 2016 October Question Paper with Answers The two types of video compressions are : (i) (ii) Lossless compression: Retains the exact image throughout the compression. Lossy compression: Provides a comparatively higher ratio of compression but results in some loss of quality. 83. The Musical Instrument Digital Interface or the MIDI format is one that is commonly used for transferring music information between electronic music devices like synthesizers and sound card in computers. 84. To insert a slide, click the Slide button in the Presentation toolbar or choose Insert Slide from the menu bar. The new slides uses the page layout of the previous slide. To delete a slide, select the slide, to delete in the Slides Pane and press Delete key or right click on the slide, and choose Delete Slide. 85. To start a custom slide show : (i) Choose Slide Show Custom Slide Show. (ii) Select the slide show the user want to start from the list. (iii) Click Start. 86. An object is a group of related functions and data. An object is a kind of self-sufficient sub-program with a specific functional area. 87. Conditional Operator?: (num 1 > num 2)? true : else -?: Is a ternary operator. num1 > num2, true, false, are theoperands. A ternary operator (?:) is also called as conditional operator. The general syntax is E1? E2: E3 where E1, E2 and E3 are values or statements. (for example to assign the maximum value of the two values one can express it as: max=(num1 > num2)? num1 > num2; The variable max will take the value of num 1 if num 1 is greater than num 2, otherwise max will be assigned with the value of num Users can define a variable that would represent an existing data type. Type definition allow users to define such user defined data type identifier. The syntax : typedef data_type user_defined_data_type_ identifier; For example: typedef int marks; typedef char grade; 89. The impact of modifiers. (i) unsigned modifies the range of the integer values as the sign bit is also used to store data. (ii) long increases the bytes for a particular data type, thus increasing the range of values. 90. Nested if statement. The statement sequence of if or else may contain another if statement i.e., the if.. else statements can be nested within one another as shown below: In an nested if.. else statement, Each else matches with the nearest unmatched preceding if.

11 Sura s XII Std Computer Science 2016 October Question Paper with Answers There are four types of scopes in C++. They are, i) Local scope ii) iii) iv) Function scope File Scope Class scope 92. strlen() function is used to return the length of the string or- a string array. Eg : strlen( school ). It returns the value A matrix is a set of m n numbers arranged in the form of a rectangular array of m rows and n columns. Matrics can be represented through 2-D arrays. 94. A class is a new way of creating and implementing a user defind data type. Classes provide a method for packing together data of different types. A class is way to bind the data and its associated functions together Data members are the data variables that represent the features of properties of a class. 2. Memeber functions are the functions that perform specific tasks in class. Member functions are called as methods and data members are also called as attributes. 96. The term operator overloading, refers to giving additional functionality to the normal C++ operators like +,++,-,, +=, -=, *.<,>. The statement sum = num1 + num2 would be interpreted as a statement meant to perform addition of numbers (integer/float/double) and store the result in the variable sum. 97. Functions of constructor are: (i) The constructor function initializes the class object (ii) The memory space is allocated to an object. 98. There are different types of inheritance. Single inheritance, multiple inheritance, multilevel inheritance, hybrid inheritance and hierarchical inheritance. 99. Computers helps us to look at the government websites and the services provided by them. The various websites provided by the government give the details about the departments, specific functions, special schemes, documents, contacts, links, IAS intranet, site map, search, what s new, press releases, feedback. These websites are both in English and Tamil A virus is a self-replicating program that can cause damage to data and files stored on your computer. These are programs written by programmers with great programming skills who are motivated by the need for a challenge or to cause destruction known virus programs are in existence. Six new viruses are found each day. PART -III 101. The Find and Replace feature in StarOffice Writer to search for and to replace words in a text document. To Find and Replace Text (i) Choose Edit Find & Replace The Find and Replace dialog box appears. (ii) In the Search for box, type the text or word of a document to be searched. (iii) In the Replace with box, enter the replacement word or phrase. (iv) Click Find to start the search.

12 12 Sura s XII Std Computer Science 2016 October Question Paper with Answers (v) To find the first instance of the word or phrase, do one of the following: (a) (b) (c) To replace the found instance of the text of a document entered in the Replace with box, click Replace. To replace all instances of the text of a document entered in the Replace with box, Click Replace All. To skip the found text and to continue the search, click Find again. 6. Click Close to finish the search. 102.The functions of each icon in the toolbar are : Table Fixed. Table Fixed, Proportional. Table Variable. Merge cells : This icon is used to combine two or more cells into a single cell. Split cells : This icons is used to split a cell into two or more cells. Optimise : Clicking on this icon displays a pop-up menu with options like Space columns equally, Space rows equally, Optimum row height and Optimum Column width. Inserting Row : This icon is used to insert a row below the current row. Inserting Column : This icon inserts a column to the right of the current column. Delete Row : This icon deletes the current row from the table. Delete Column : This icon deletes the current column from the table. Borders : This icon display a floating toolbar with different border option for the table. Line Style : This icon is used to choose the style of line to be used for the borders. Border Colour : Clicking on this icon displays a palette of colours that can be used as a border colour for the table To get Insert Object floating toolbar, click on View Toolbar Insert Object option. It displays with following icons : 1. Insert chart icon : This icon is used for presenting the data in the worksheet in the form of charts of different kinds such as bar chart, pie chart, lines, X-Y plot, etc. 2. Insert Formula icon : This icon is used for inserting a formula in the worksheet for performing calculations. 3. Insert Floating Frame icon : This icon is used to generate a scrolling screen within a worksheet.

13 Sura s XII Std Computer Science 2016 October Question Paper with Answers Insert Movie and Sound icon : This icon is used to insert sound or video files into the current worksheet. 5. Insert OLE object icon : This icon is used to insert objects from other application into a worksheet. 6. Insert Applet icon : This icon is used to import Java Applets into the worksheet An electronic spreadsheet is a worksheet used in a computer to create and quickly perform 'What if' analysis of interrelated columnar data in workspaces. The main advantages of using electronic spreadsheets are : i) Calculations are automated through ii) the built-in mathematical, financial and statistical functions. Accurate results to any desired level of decimal points are possible. iii) Worksheets can be quite big in size. iv) Any part of the worksheet can be viewed or edited. v) Worksheet can be saved and retrived later. vi) Any part of an existing worksheet can be merged with any existing or new worksheet. vii) Any part or whole of the worksheet can be printed in a desired format. viii) Worksheet data can be viewed in the form of graphs or charts. ix) The worksheet information can be transferred to any database or word processing software The classification of Database based on conceptual structures are: (i) Flat-File database, (ii) Relational database, (iii) Hierarchical database, (iv) Network database, (v) Object-Oriented database. (i) Flat-File Database. A database file that consists of a single data table is a Flat-file database. Flat-file database can be quite useful for certain single-user or small-group situations, especially for maintaining lists such as address lists or inventories. Data that is stored, managed, and manipulated in spreadsheet is another example of a flat-file database. (ii) Relational database. A relational structure represents a database made up of a set of related tables. In a relational database, one or more common fields existing in two or more tables create a relationship between these tables. The common field or fields are called the Keys. A primary key is a key that uniquely identifies a record in a database table. In relational databases, a primary key can consist of one or more fields. The relational database structure is the most prevalent database in today s business organizations. (iii) Hierarchical database. The hierarchical database structures were primarily used on Main Frame computers. In hierarchical database, records are

14 14 Sura s XII Std Computer Science 2016 October Question Paper with Answers organized in a tree like structure by type. The relationship between record types is said to be a parent- child relationship, in which any child type relates only to a single parent type. (iv) Network database.the Network database is very similar to the hierarchical structure except that any one record type can relate to any number of other record types. (v) Object Oriented database. An Object Oriented database is a newer structure that has been generating a greet deal of interest in recent years. The object oriented structure groups data items and their associated characteristics, attributes and procedures into complex items called objects. Physically an object can be anything: a product or event, such as house, an appliance, an art piece, a customer complaint, or even a purchase. An object is defined by its characteristics, attributes and procedures. An object s characteristics can be text, sound, graphics and video. for(initial value ; test-condition ; increment) action block; The general working of for(;;)loop is: (i) The control variable is initialized the first time when the control enters the loop for the first time. (ii) Test condition is evaluated. The body of the loop is executed only if the condition is TRUE. Hence for(;;) loop is called as entry controlled loop. (iii) On repetition of the loop, the control variable is incremented before the body of the loop is executed. (iv) The loop is terminated when the test condition evaluates to false. The following program illustrates for(;;) loop: # include <iostream.h> # include <conio.h> void main( ) Examples of attributes might be colour, size, style, quantity and price. int i,fact = 1; A procedure refers to the processing or for(i = 1; i < 6; i++) handling that can be associated to the object. fact *=i; 106. for (; ; ).. loop: is an entry controlled loop cout << \nthe factorial of the number and is used when an action is to be repeated is.. << fact; for a predetermined number of times. The syntax is

15 Sura s XII Std Computer Science 2016 October Question Paper with Answers 15 for (i = 1; i < 6; i++) Incrementation (1st segment) Test condition (2nd segment) Initialisation of control variable (3rd segment) (i) Initialisation is executed only once, i.e., when the loop is executed for the first time. (ii) Test condition is evaluated before the commencement of every iteration. (iii) Incrementation is evaluated and executed before the commencement of new iteration Call statement to a function makes a compiler to jump to the functions and also to jump back to the instrument following the call statement. This forces the compiler to maintain overheads like STACKS that would save certain special instruments pertaining to function call, return and its arguments. This reduces the speed of program execution. Hence under certain situations specially when the functions are small (less number of instructions), the compiler replaces the function call statement by its definition i.e., its code during program execution. This feature is called as inlining of a function technically called as inline function. For example, # include <iostream.h> # include <conio.h> inline float convert_feet(int x) return x * 12; void main( ) clrscr( ); int inches = 45; cout << convert_feet(inches); getch( ); 108. The ability of the function to process the message or data in more than one form is called function overloading. Rules for function overloading are : (i) Each overloaded function must differ either by the number of its formal parameters or their data types. (ii) The return type of overloaded functions may or may not be the same data type. (iii) The default arguments of overloaded functions are not considered by the C++ compiler as part of the parameter list. (iv) Do not use the same function name for two unrelated functions output Program : # include <iostream. h> # include < conio.h > class A public: int a1,a2:a3;

16 16 Sura s XII Std Computer Science 2016 October Question Paper with Answers void getdata[] a1=3; a2=3;a3=5; Class B:: public A Public: void func() int b1:b2:b3; A::getdata(); b1=a1; b2=a2; a3=a3; ]]]] cout<<b1<<'\n'<<b2<<'\n'<<b; void main() clrscr(); B der; der :func(); getch() 110. Output : constructor of class sample object The two integers are The sum of integers 110 Destructor of class sample.