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Categories >> Software >> Programming Languages >> C++ >> C++ General
 
 


 

 
 STL interview questions  STL Interview Questions (91)
 OOPS interview questions  OOPS Interview Questions (558)
 C++ General interview questions  C++ General Interview Questions (458)
Question
what is data Abstraction? and give example
 Question Submitted By :: C++-General
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
data abstraction is a process of representing the essential
features without including implementation details.
 
Is This Answer Correct ?    1321 Yes 114 No
Prathiba
 
Answer
# 2
Abstraction is the process of exhibiting only the essential
characteristics of an object depending on programmers
view.It is complement to encapsulation.
 
Is This Answer Correct ?    293 Yes 79 No
Karthick
 
 
 
Answer
# 3
data abstraction is the process of representing essential
details not including inter nal details.example index of
the book
 
Is This Answer Correct ?    219 Yes 33 No
Guest
 
Answer
# 4
Data abstraction refers to, providing only essential
features by hiding its background details.
example:
class result
{
int marks;
float percentage;
char name[20];
void input();
void output();
}

main()
{
bank b1;
b1.input();
b1.output();
}

in the above example, b1 is an object calling input and
output member functions, but that code is invisible to the
object b1.
 
Is This Answer Correct ?    167 Yes 30 No
Namitha
 
Answer
# 5
It refers we can represents essential features without
including background details and explanations
ex:
index of text book.
class School
{
void sixthclass();
void seventhclass();
void tenthclass();
}
 
Is This Answer Correct ?    170 Yes 56 No
M.harikrishnam Raju
 
Answer
# 6
in oops the data abstraction is defined as represent
essential features without including background details or
implementation details.class use the concept of data
abstraction.
 
Is This Answer Correct ?    111 Yes 42 No
Pintu Gupta
 
Answer
# 7
data abstraction is a process of representing the essential
elements,hiding the back ground details.
 
Is This Answer Correct ?    73 Yes 20 No
Vishwajit Kumar
 
Answer
# 8
simply hiding implementation details and show what ever the
client programmer needs. there are two programmers in
devolopint the project Class Creators (who create new
datatypes) and client programmers (class consumers who use
data types in their applications).

It is helpful to break up the playing field into class
creaters and client programmers. The goal of the client
programmer is to collect a toolbox full of classes to use
for rapid application devolopment. The goal of the class
creator is to build a class that exposes only whats
necessary to the client programmers and keeps everything
else hidden. why because the client programmers cant use it
which means that the class creatior can change the hidden
portion at will without worrying about the impact to anyone
else. The hidden portion usually represents the tender
insides of an object that could easily be corrupted by a
careless or uninformed client programmer so hiding the
implementation reduces program bugs.

It is acheived in c++ through class boundaries (private
public and protected keywords...)

ex: class Light
{
private:
//data
public:
on();
off();
//.....
};
Light lt.on();
 
Is This Answer Correct ?    49 Yes 7 No
Prakash
 
Answer
# 9
DATA ABSTRACTION MEANS ESSENTIAL FEATURES WITHOUT GIVING
THE BACKGRAOUND DETAILS
 
Is This Answer Correct ?    58 Yes 18 No
Deepak
 
Answer
# 10
Data abstraction is a process of representing the essential
features without including background properties(or)
implementation details.
 
Is This Answer Correct ?    49 Yes 14 No
M.arul
 

 
 
 
Other C++ General Interview Questions
 
  Question Asked @ Answers
 
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Write the program form Armstrong no in c++? HCL 10
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iam a fresher to Qt(GUI a c++ based framework software). i need to develop the basic applications on designer by drag and dropping mechanism...so pls send me the procedure to design applications?   1
write a C++ programming using for loop: * * * * * * * * * * TCS 4
Write a corrected statement in c++ so that the statement will work properly. x + y=z;   2
what is the size of a class which contains no member variables but has two objects??? is it 1 or 2??   4
Is there any difference between dlearations int* x and int *x? If so tell me the difference? Lason 16
Why can you not make a constructor as const?   3
How many pointers are required to reverse a link list? CTS 5
class Alpha { public: char data[10000]; Alpha(); ~Alpha(); }; class Beta { public: Beta() { n = 0; } void FillData(Alpha a); private: int n; }; How do you make the above sample code more efficient? a) If possible, make the constructor for Beta private to reduce the overhead of public constructors. b) Change the return type in FillData to int to negate the implicit return conversion from "int" to "void". c) Make the destructor for Alpha virtual. d) Make the constructor for Alpha virtual. e) Pass a const reference to Alpha in FillData Quark 2
Given the following function definition: int doit(int &x, int y, int &z) { x = 3*x; y = y + 5; z = x+y; return z - 4; } int a = 5, b = 7, c = 9, d = 11; d = doit(a,b,c);   2
 
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