Technology Questions

PHP’s configuration file is called php.ini.

The comparison operator that is used in SQL is '='. Comparison operators test whether two expressions are the same. Comparison operators can be used on all expressions except expressions of the text, ntext, or image data types.

SQL has IsDate() function which is used to check passed value is date or not of specified format ,it returns 1(true) or 0(false) accordingly.

SELECT  ISDATE('1/08/13') AS "MM/DD/YY";

It will return 0 because passed date is not in correct format.

When amount of memory to be allocated is known beforehand i.e. at the the time of compilation, it is known as Static Memory Allocation. Once the memory is allocated statically, it cannot be deallocated during program run. So it leads to wastage of storage space.

Example:

int A[100];

When amount of memory to be allocated is not known beforehand, rather it is determined at the time of program run, it is called Dynamic Memory Allocation. It leads to efficient utilization of storage space.

Example:

cout << " Enter number of elements: ";

cin >> N;

int *A = new int[N]; // dynamic memory allocation

Open addressing (closed hashing),

The methods used include: Overflow block,

 Closed addressing (open hashing)

The methods used include: Linked list, Binary tree…

The PHP default variable $_PHP_SELF is utilized for the PHP script name and when you click "submit" catch then same PHP script will be called.