+2 Volume II OBJECT TECHNOLOGY OBJECTIVE QUESTIONS R.Sreenivasan SanThome HSS, Chennai-4. Chapter -1

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1 Chapter Object Oriented programming is a way of problem solving by combining data and operation 2.The group of data and operation are termed as object. 3.An object is a group of related function and data that serves those functions. 4.An object is a kind of self sufficient sub programs with a specific functional area. 5.The process of grouping data and functions as objects is encapsulation. 6.The mechanism by which data and functions are bound together within an objects definition is called as encapsulation. 7.The ability of an object to respond differently to different messages is called polymorphism. 8.The process of acquiring the base class properties is called inheritance. 9. An object attempts to capture a real world object in a program. CHAPTER-2 1.C++ was developed at AT & T Bell laboratories in 1980 by Bjarne Stroupstrup. 2.The name C++ was coined by Rick Mascitti. 3.The basic types in a C++ character set are collectively called as tokens. 4.A token is the smallest individual unit in a program. 5.Tokens are classified into five types. 6.Keywords in C++ is known as reserved words. 7.Identifiers are also called as variables. 8.A sequence of digits starting with zero is an Octal constant. 9.The sequence of digits starting with Ox is called as hexadecimal integer. 10.The letter E or e is used to represent floating point constant exponent form. 11.Character constant is a constant that contains a single character enclosed within single quotes. 12.A variable name must begin with an alphabet or underscore. 13.Special character like tab, backspace, line feed, null, backslash are called non graphic character content. 14.Escape sequences are represented using character prefixed with a backslash. 15.String literal is a sequence of characters enclosed by double quotes.

2 16.The special character \0 marks the end of a string. 17.An operand is an entity on which an operator acts. 18.The operator # and ## are used only by preprocessor. 19.Operators are classified into 13 different types. 20.Operators are executed in the order of precedence. 21.The logical grouping of operand and operator is called association. 22.The resultant value of (5+6)/3 is an integer if the inputs are integers. 23.The resultant value of (5+6)/3 is an float if the inputs are real. 24.The resultant of 1+pow(3,2) is If a=5, b=5, a = a+ b++ What is the value of a? if x = 10, f = 20, c= x f What is the value of c, x and f? 31, 20, If fun=1, sim=2, final = --fun+ ++sim-fun. What is the value of fun, sim and final? 0, 3, The are 6 types of Relational operators.? 29.The result of a relational operation is returned as true of false. 30. If num1 = 99, num2=20 and num3=10 what is the result of the expression (num1+num2-num3)/5*2< ( num%10 ) False 31. Relational operators have lower precedence that the arithmetic operators. 32.The logical operators have lower precedence to relational and arithmetic operators. 33.A ternary operator (?: ) is also called conditional operator. 34. If a = 10, b = 10 what is the result of x = ( a<b)? a*a : b%a? Ans. x = 0 35.There are 2 types of comments in C The C++ data types is classified into 3 categories. 37.User defined data type enables a programmer to invent own data type and define values. 38.Storage class is another qualifier that can be added to a variable declaration. 39.There a four types of storage specifiers. 40. auto defines local variable known to the block in which they are defined. 41.By default the local variables are auto.

3 42. Static variables defined within a function or a block cease to exist, the moment the function or the block looses its scope. 43.Static modifier allows the variable to exist in the memory of the computer, even if its function or block within which it is declared looses its scope. 44.extern is a global variable known to all functions in the current program. 45.The register modifier instructs the compiler to store the variable in the CPU register to optimize access. 46. Built in data types are also called as Fundamental or Basic Data types. 47. The three fundamental data types are Integral, Float and void. 48.Integral data type is divided into 2 types as int and char. 49.char is character data type that can hold both character and integer data. 50.The statement char ch=65 yields the same result of storing the value A in the variable ch. 51.Floating type is divided into float and double. 52.void has two important purposes. 53. A pointer is a variable that hold a memory address 54.Variables are user defined named entities of memory locations that can store data. 55.Every variable should be separated by a comma. 56. There are nine words for data types. 57.Maximum and minimum value stored in an integer variable is and The 16 th bit is also called as the Most significant bit or sign bit 59.The modifier alters the base data type to yield new data type. 60.The const qualifier specifies that the value of a variable will not change during program execution. 61.Implicit conversions refers to data type changes brought about in expressions by the compiler. 62.The sizeof operator returns the size(memory requirements) in terms of bytes 63.Type cast is achieved by prefixing the variable or value with the required data type. Chapter-3 1.The declarations for the object cin are available in a header file called istream.h 2. The declarations for the object cout are available in a header file called ostream.h 3.The iostream.h file comprised the combined properties of istream.h and ostream.h

4 4.The >> is the extraction or get from operator. 5.The operator << is called the insertion operator or put to operator 6.Cascading of insertion operator facilitates sending of multiple output via a single statement. 7.A C++ program has primarily three sections. 8.Program statements that cause a jump of control from one part of a program to another are called control Structures 9.The two major categories of control structures are Decision and looping statements. 10.The if statement is implemented in 2 forms. 11.Switch statement is a multiple branching statement 12.There are three kinds of loops in C Do.. while loop is a Exit-Check Loop. 14. While condition is called as the Entry Check loop. 15.The while loop will be executed only if the test expression results in true. 16.The while control exits the loop when the test expression is evaluated to false. 17. The for loop is an entry controlled loop. 18. A loop execution is terminated when the test condition evaluates to false. 1.Functions are building blocks of C++. Chapter-4 2.A function can be called or invoked from another function by using its name. 3.Parameters are the channels through which data flows from the call statement to the function and vice versa. 4.Parameters declared in the function main program are called Actual parameter. 5. Parameters declared in the function program are called Formal parameter. 6.Parameter passing in functions are of two types. 7.The call by value method copies the values of actual parameters into the formal parameters. 8.The call by value function creates its own copy of arguments and then uses them. 9.Any change in the formal parameter is NOT reflected back to the actual parameter is Call by value method. 10.In Call by reference method the formal parameters become alias to actual parameters I the calling function.

5 11.Any change made in the formal parameter is reflected back in the actual parameter is called Call by reference method. 12.The functions that return no value is declared as void. 13.A function returning a reference can appear on the left-hand side of an assignment. 14.The formal parameters for a reference functions should always be of reference parameter type. 15.Reusability of code leading to saving of memory space and reduction in code size. 16.An inline looks like a normal function in the source file but inserts the functions code directly into the calling program. 17.Inline functions execute faster but requires more memory space. 18.Inline keyword is just a request to the compiler. 19.Scope refers to accessibility of a variable. 20.There are four types of scopes in C A local variable is defined within a block. 22.The life time of a function scope variable is the life time of the function block. 23.A variable declared above all blocks and functions has the scope of a file. 1.An array in C++ is a derived data type. Chapter An array is a collection of variables of the same type that are referenced by a common name. 3.Arrays are of two types. 4.The size of the array should always be positive. 5.The memory allotted for an array that stores 5 integer values is 10 bytes. 6.The array subscripts always commences from zero. 7.Strings are otherwise called as literals. 8.A character array should be terminated with a \0 (NULL) character. 9.There are two methods to display the contents of string. 10.The write functions requires two parameters. 11.The strlen() function returns the number of characters stored in the array. 12.The strcpy() copies source string to target string.

6 13.The strcmp() function compares the two given strings. 14.The strcmp() returns 0(zero) if strings are equal. 15. The strcmp() returns 1 if string 1 is greater than string The strcmp() returns value less that zero if string 1 is less than string The size of the array for int sales[2][4] is 16 bytes. 18.The size of the array for float num[4][6] is 96 bytes. 19.The number of elements for int array[10[[12] is 120 elements. 20. The number of elements for int x[][2]={0,1,1,2,2,3} is 6 elements. 21.Array parameters by default behave like a reference parameter. 1.The most important feature of C++ is a Class. Chapter 6 2.Bjarne Stroustrup initially gave the name for C++ as C with Classes 3.A class is a way to bind the data and its associated functions together. 4.The class specification has two parts. 5.The keyword class specifies userdefined data type class name 6.The body of a class is enclosed within braces and is terminated by a semicolon. 7.The class body contains the declarations of variables and functions. 8.The class body has three access specifiers. 9.By default the members will be treated as private if visibility label is not mentioned. 10.The members declared private can be accessed only from within the class. 11.The members declared as protected can be accessed from within the class and members of inherited classes. 12.The members declared as public can be accessed from outside the class also. 13.The binding of data and functions together into a single entity is referred as encapsulation. 14.The members declared outside the class is referred as data hiding. 15.Instruments allowing only selected access of components to objects and to members of other classes is called data abstraction. 16.Private accessible by only its own members and certain special functions called as friend functions.

7 17.Class variables are known as objects. 18.The members of a class are accessed using he dot operator. 19.The objects declared outside the class cannot access members or functions defined under private or protected. 20.The members defined within the class behave like inline functions. 21.A member function can call another member function directly without using the dot operator. 22.The static member variable is initialized to zero. 23.The initial value to a static member variable is done outside the class. 1.The word polymorphism means many forms. Chapter-7 2.Polymorphism is achieved by function and operator overloading. 3.The term overloading means a name having two or more distinct meanings. 4.An overloaded function refers to a function having more than one distinct meaning. 5.The ability of the function to process the message or data in more than one form is called as function overloading. 6.In function overloading the compiler adopts best match strategy. 7.Integral data promotions are purely compiler oriented. 8.The term operator overloading refers to giving additional functionality to the normal C++ operator. 9.The function strcat() is used to concatenate strings. 10.Operators that cannot be overloaded are membership operator(.), scope resolution operator(::), size of operator, and conditional operator(?:) 11.Operator functions must be either member functions or friend functions. 12.In operator overloading the + operator has been used to merge two strings. 13.The mechanism of giving special meaning to an operator is called as operator overloading. 14.When binary operators are overloaded, the left hand object must be an object of the relevant class. 15.Binary operators overloaded through a member function take one explicit argument. 16.The overloaded operator must have at least one operand of user defined type.

8 Chapter-8 1.When an instance of a class comes into scope, a special function called the constructor gets executed. 2.When a class object goes out of scope a special function called the destructor gets executed. 3.The constructor without parameters is called default constructor. 4.The constructor add( add &a) is called as copy constructor. 5.The prefix used for destructor is tilde(~) symbol. 6.In a class only one destructor is possible. Chapter-9 1.Inheritance is the process of creating new classes called derived classes. 2.The derived class is called as power packed class. 3.The name of the derived class is to be given after the keyword class. 4.The punctuation used for derived class is a colon(:) 5.The important feature in inheritance is to know as to when a member of a base class can be used by the objects is known as accessibility. 6.The default visibility mode is private. 7.There are five types of inheritance. 8.Constructor are executed from the base constructor to derived. 9.Destructors are executed in the reverse order. 10.Classes used only for deriving other classes are called as Abstract Classes. 1.85% of computer usage is Word Processing. 2.The archive unit enables data storage and management. Chapter-10 3.Emotion containers are small containers with a screen, speaker and a scent to derive emotional comfort. 4.Devices with karaoke allows one to sing along with the audio coming from the original source. 5.Memo frame is an easy interaction with other people through touch screen, scanner and microphone. 6.Personal creativity tool is used to draw capture and work with multimedia elements.

9 7.Advanced machines like ATM enable withdrawal of money from anywhere at any time. 8.e-banking permits banking from the comfort of the home by using internet facilities. 9.e-learning enables online educational programs leading to degrees and certifications. 10.Internet facilitates remote diagnostics called Tele-medicine. Chapter 11 1.Dictaphone converts speech into a letter is an IT enables services. 2.Computers help to browse at the government websites and the services provided by them is called e-governance. 3.A call center is defined as a telephone based shared service center for specific customer activities. 4.Data management is for collection, digitization and processing of data coming from various sources. 5.Data security and customer privacy are two important aspects that must be ensured by the ITES provider. 6.Medical transcription is a permanent, legal document that is a result of a medical investigation. 7.Digitization refers to the conversion of non-digital material to digital form. Chapter-12 1.Computer ethics is the work of Norbert Wiener during World War II. 2.In 1960 s Donn Parker began to examine unethical and illegal uses of computers by computer professionals. 3.There are 3 types of data security. 4.Physical security refers to the protection of hardware. 5.Personal Security refers to software setups that permits only authorized access to the system. 6.Personnel Secuity refers to protecting data and computer system against dishonest employees. 7.Computer crime is any illegal activity using computer software or data as an instrument of crime. 8.A virus is a self-replicating program that can cause damage to data and files stored in computer 9.Software that runs on a idle computer without the knowledge of the organization is called theft of computer time. 10.Cracking is the illegal access to the network or computer system which is a cyber crime. 11.India has Cyber laws to prevent computer crimes % of computer crime happens within the company. 13.Making and using duplicate hardware and software is called piracy. 14.The ten commandments of computer ethics was written by the Computer Ethics Institue.

10 Study the following in addition 1. Table 2.1 Keywords 2. Table 2.2 Escape Sequences 3. Table 2.4a Unary Operators 4. Table 2.4b Binary Operators 5. Table 2.5 Mathematical Operator Precedence 6. Table 2.9 Assignment Operators 7. Table 2.10 Operator Precedence 8. Table 2.11 Punctuators and their Purpose. 9. Table 2.13 Data types Size and Range of Values 10. Table 2.15 Data types with modifiers 11. Go through Exercises in Page 51 to Go through Table 3.1 If construct 13. Go through exercises from page 89 to Go through exercises from page 118 to Go through Exercises from page 145 to Go through exercises in Page 194

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