LORD P.C.A.A LIONS MAT.HR.SEC SCHOOL, RESERVE LINE, SIVAKASI

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1 COMMON HALF YEARLY EXAMINATION DECEMBER 2018 Standard 12 ( Virudhunagar ) Computer Science Answer Key Section I Choose the correct answer : 15 X 1 = d) Ctrl + A 2. d) Fajita 3. d) MM/DD/YY 4. b) SUM( ) 5. c) 5 6. a) a) Joint Photographic Experts Group 8. c) a) { } 10. c) b) a) c) ~ 14. a) Computer Based Tutorials 15. c) Section II II. Answer any six questions : ( Questions No.22 is compulsory) 6 X 2 = Text Editing : Entering a new text or modifying the existing text in a document is known as Text Editing. 17. Types of paragraph Alignment : Centered Ctrl+E Right-aligned Ctrl+R Left-aligned Ctrl+L Justified Ctrl+J 18. Auto Correct options : StarOffice Writer recognizes some common misspellings and typographical mistakes and makes the replacement automatically. Ex : The is automatically changed into The. 19. Popular Spreadsheet software : Excel - Microsoft Corporation Quattro Pro - Borland International. Improve - Lotus Corporation StarOffice Calc - Sun Microsystems. 20. Difference between Query and Filter : Query Filter Queries can be saved for later use Filters cannot be saved for later use Queries do not affect the original table Filters affect the original table Kindly Download From Original Education Website - Avoid Duplicate Websites as as as as as as as as

2 21. Compression : Compression is a technique by which a recurring set of information is identified and replaced by a single piece of information. 22. f = ( x==30)? 0.5:5 23. Different types of inheritance : Single Inheritance Multiple inheritance Multilevel inheritance Hybrid inheritance Hierarchical inheritance 24. Call centers : A call center is sometimes defined as a telephone based shared service center for specific customer activities and are used for number of customer-related functions like marketing, selling, information transfer, advice, technical support and so on Section III III. Answer any six questions : ( Questions No.32 is compulsory) 6 X 3 = To change the Rows and Column Width : To resize a column, place the cursor in a table cell, hold down Alt, and then press the left or the right arrow. To resize the column without changing the width of the Table, hold down Alt+Ctrl, and then press the left or the right arrows. To resize a row, place the cursor in the row, hold down Alt, and then press the up or the down arrows. Table Table Properties command is used. Table Format dialog box appears. Choose the Columns tab Type column size in the Column Width spin boxes and click OK button. 26. To insert page number : Click in the header or footer area. Clicking on Insert Fields Page Number will insert page numbers on every page. Normal text can also be included in the header and footer. 27. Range : Continuous group of cells in a worksheet is called a Range. A range is referred to by the range address. A range address is the address of the first cell in the range, followed by a colon, followed by the address of the last cell in the range. For example, the cells, G1, G2, G3, G4 and G5 can be called G1:G Reference Operator : These operators combine areas. Operator Name Example : (Colon) Range A1:C108! (Exclamation point) Intersection SUM(A1:B6!B5:C12) Kindly Download From Original Education Website - Avoid Duplicate Websites as as as as as as as as

3 29. Report : A report is printed information that is assembled by gathering data based on user supplied criteria. Types : Static Report Dynamic Report 30. Rehearse Timings : StarOffice assists in defining the right rehearse timings for automatic slide changes. StarOffice records the display time for each slide, so the next time we play the show with automatic slide changes, the timing will be as recorded. 31. Encapsulation : The mechanism by which the data and functions are bound together within an object definition is called as ENCAPSULATION. 32. Error : Corrected 1 Corrected 2 switch(x) switch(x) { { case 1: case 1: case 2: cout<< one << two ; cout<< one ; break; break; case 2: cout<< two ; break; } } 33. Theft of Computer Time : Idle time of computers in an organization is being stolen illegally. Some other software runs on an idle computer without the knowledge of the organization. This is called theft of computer time. Section IV IV. Answer all questions : 5 X 5 = Find and Replace : Find and Replace dialog box diagram ( 1 mark ) Explain the dialog box ( 3 mark ) Spell check after the entire document is typed : Spellcheck dialog box diagram ( 1 mark ) Explain the dialog box ( 3 mark ) 35. Table formatting toolbar : Draw and explain 13 icons ( 5 mark ) Table Fixed, Table Fixed Proportional, Table Variable Merge cell, split cell Optimise Insert Row, Insert Column Delete Row, Delete Column Borders, Border colour, Line Style Kindly Download From Original Education Website - Avoid Duplicate Websites as as as as as as as as

4 Insert chart in a worksheet : Explain AutoFormat Chart dialog box with four steps, ( 4 mark ) Range Chart type ( Pie, Bar, Column etc.) Variant ( Format of chart type ) Display ( Name for Chart title, X and y axis ) 36. Types of Database : ( 5 mark ) 1. Flat File database ( 1 mark ) ( Single data table, small group institution, Ex: Spreadsheet, not allow complex request) 2. Relational database ( 1 mark ) ( set of related tables, common field-key, primary key, todays business organization) 3. Hierarchical database ( 1 mark ) ( Main frame computer, tree like structure, Parent child relationship) 4. Network database ( 1 mark ) ( one record type relate to other record types ) 5. Object-Oriented database ( 1 mark ) ( newer structure, groups data item-character-attributes object, physically object ex) Scope Rules of variables : Scope refers to the accessibility of a variable. ( 1 mark ) There are four types of scopes in C++. They are: 1. Local scope 2. Function scope 3. File scope 4. Class scope Explain about the 4 Scopes. ( 4 mark ) 37. Nested if statement : The statement sequence of if or else may contain another if statement. ( 1 mark ) The if.. else statements can be nested within one another as as as as as ( 2 mark ) as Explain with an example ( 2 mark ) Rules for Operator Overloading : ( 5 mark ) Only existing operators can be overloaded. New operators cannot be created. The overloaded operator must have at least one operand of user defined type. The basic definition of an operator cannot be replaced or in other words one cannot redefine the function of an operator. One can give additional functions to an operator Kindly Download From Original Education Website - Avoid Duplicate Websites as as

5 Overloaded operators behave in the same way as the basic operators in terms of their operands. When binary operators are overloaded, the left hand object must be an object of the relevant class Binary operators overloaded through a member function take one explicit argument Output : ( 5 mark ) HELLO Values of A and B The two integers are The sum is 30 The multiply is 200 ( or ) Error : ( 5 mark ) Line No Incorrect code Correct code 1 #include<iostram.h> #include<conio.h> 2 include<coino.h> #include<conio.h> 5 Private; private: 7 Public: public: 9 PROTECT: protected: 12 class A ; Public B; class B : public A 14 Public: public: 17 int b1:b2:b3 int b1, b2, b3; 18 b1=a1 a1 is a private member which cannot be accessed outside the class Inbetween 20 & 21 } statement missing 22 void( ) void main( ) 25 der:a3; der.a3=0; 26 a3:fun( ); der.func( ); as as as as as as as Kindly Download From Original Education Website - Avoid Duplicate Websites as

LORD PCAA LIONS Mat.Hr.Sec School, Reserve Line, Sivakasi

LORD PCAA LIONS Mat.Hr.Sec School, Reserve Line, Sivakasi Virudhunagar District schools Common First Mid Term Test, July 2018 Standard 12 - computer science Part - I I. Choose the correct answer for the following : 10 X 1 = 10 1. Shift + Tab key is used to move