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C Programming - Declarations and Initializations - Discussion

Discussion Forum : Declarations and Initializations - General Questions (Q.No. 7)
Declarations and Initializations
7.
Which of the following is not user defined data type?
1 : 
struct book
{
    char name[10];
    float price;
    int pages;
};
2 : 
long int l = 2.35;
3 : 
enum day {Sun, Mon, Tue, Wed};
1
2
3
Both 1 and 2
Answer: Option
Explanation:

C data types classification are

  1. Primary data types
    1. int
    2. char
    3. float
    4. double
    5. void
  2. Secondary data types (or) User-defined data type
    1. Array
    2. Pointer
    3. Structure
    4. Union
    5. Enum

So, clearly long int l = 2.35; is not User-defined data type.
(i.e.long int l = 2.35; is the answer.)

Discussion:
48 comments Page 4 of 5.
Kavitha said:   1 decade ago
int float char also not a userdefiend data then why it comes answer is both 1 and 2
Padma said:   1 decade ago
Yes kavi but there is a user defined data type. It is not in it.
Thanvi said:   1 decade ago
What is the difference b/w primitive n nonprimitive data type?
Levin max said:   1 decade ago
Primitive data types are already predefined data types as such as int , float,double etc. whereas non primitive data types are created by d users as such as objects in java....
Krishna said:   1 decade ago
Which is the nonprimitive datatype in c++?
Krishna said:   1 decade ago
Can you explain me the union operation?
Shan_mani said:   2 decades ago
Can you explain the enum operation?
Manas said:   1 decade ago
Primitive types are declaration types and the primitive type is already defined by the java programming language. There are eight primitive types defined in java: int, char, boolean, short, void, long, float, double.

Non primitive types are called java reference types and they have name starting with capital letter. Eg: Integer, Float etc.
Rakesh kumar said:   1 decade ago
Can you explain me in detail the difference between structure, union and enum operations?
Karthick said:   1 decade ago
Structure is the collection of different datatype under the common name, union is similar to structure the difference is. In union we can achieve the memory management ie, only the particular data that we call will occupy memory, enum is already explained above.
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