C++ Language INTERVIEW QUESTION & ANSWERS
| 51. |
What is a pointer? |
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- A pointer is a variable which holds a memory address within.
- Each variable is located at a particular position in the memory which is known as Address.
- The address can be stored in a pointer.
- A program accesses the value in the address stored in the pointer by using indirection operator.
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| 52. |
What is an expression? |
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An expression is any statement which is composed of one or more operands and returns a value. It may be combination of operators, variables and constants. |
| 53. |
What are the types of expressions? |
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There are three types of expressions are : - Constant Expressions
- Integral Expressions
- Logical Expressions
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| 54. |
What are the types of conversion? |
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There are two types of conversion are : - Implicit (Automatic) Conversion
- Explicit Conversion
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| 55. |
What is the difference between implicit and explicit conversion? |
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When data types are mixed in an expression, the conversion is performed automatically. This process of automatic conversion is called implicit conversion.
Explicit Expressions are user defined expressions. C++ provides type casting facility. The expression can be converted into a specific type.
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