C++ Basic Interview Question and Answers
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What are the advantages of object oriented programming? |
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- Class data type allows programs to organize as objects that contain both data and functions.
- Data hiding or Abstraction of data provides security to data, as unrelated member functions cannot access its data.
- Polymorphism promotes, reduces software complexity, as multiple definitions are permitted to an operator or function.
- Inheritance allows a class to be derived from an existing class, thus promoting reusability of code.
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| 2. |
What are the two parts of a class specification? |
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A class specification has two parts - Class Declaration
- Class Function Definitions
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| 3. |
What is meant by void function? |
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The functions that return no value are declared as void. The data type of a function is treated as int, if no data type is explicitly mentioned. |
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| 4. |
What are header file? |
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- A header file comprises of all standard declarations and definitions for pre defined functions.
- One can include the header file in the program by using a preprocessor directive.
- The other header files are iomanip.h, stdio.h, ctype.h, fstream.h etc.
- A processor directive starts with #, which instructs the compiler to do the required job.
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| 5. |
What are variables? |
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Variables are user defined named entities of memory locations that can store data. |
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