Computer Application Java Notes Class 10

ACTUAL PARAMETER | FORMAL PARAMETER | A) | PARAMETER THAT APPEARS IN FUNCTION CALL STATEMENT IS KNOWN AS ACTUAL PARAMETERExp. int y = ob.sum (m, n); | A) | PARAMETER THAT APPEAR IN FUNCTION DEFINATION IS KNOWN AS FORMAL PARAMETERSExp. void sum(int a, int b) | B) | THIS IS USED TO PASS VALUE | B) | THIS IS USED TO RECEIVE VALUE | | | | | WHILE | DO WHILE | A) | WHILE LOOP WILL NOT EXECUTE AT ALL IF THE CONDITION IS NOT SATISFIED | A) | BUT DO WHILE CONTINUE ATLEAST ONCE | B) | CHECKS THE CONDITION FIRST AND THEN THE EXECUTION BEGINS. IT IS KNOWN AS ENTRY CONTROL LOOP | B) | IT CHECKS AFTER EXECUTING THE LOOP ONCE. IT IS KNOWN AS EXIST CONTROL LOOP. | | | | | CALL BY VALUE | CALL BY REFERENCE | A) | IN CALL BY VALUE THE METHOD CREATES NEW SET OF VARIABLES. (Formal parameters) TO COPY THE VALUE OF ACTUAL PARAMETERS AND WORK WITH THEM | A) | IN CALL BY REFERENCE THE REFERENCE OF ACTUAL PARAMETER IS PASSED ON TO THE METHOD AND NEW SET OF VARIABLE IS NOT CREATED. | B) | ANY CHANGE IN FORMAL PARAMETER IS NOT REFLECTED IN ACTUAL PARAMETER | B) | ANY CHANGE IN FORMAL PARAMETER IS REFLECTED IN ACTUAL PARAMETER | C) | PREMITIVE DATATYPES ARE PASSED BY CALL BY VALUE | C) | REFERENCE TYPES ARE PASSED BY CALL BY REFERENCE. | | | | | PURE FUNCTION | IMPURE FUNCTION | A) | A PURE FUNCTION DOES NOT CHANGE OR MODIFY THE STATE OF THEIR PARAMETER RECEIVED | A) | A FUNCTION THAT CHANGE THE STATE OF ARGUMENT RECEIVED IS KNOWN AS IMPURE FUNCTION | B) | RESULT DEPEND ON ARGUMENT RECEIVED | B) | RESULT DEPENDS UPON THE MODIFICATION OF ARGUMENT RECEIVED | | | | | IMPLICIT | EXPLICIT | A) | Automatic conversion of one data type into another without users intervention | A) | Conversion of one data type into another according to users choice. | B) | No loss of data | B) | Their may be a loss of data |

Advantages of Constants
( final int MAXMARKS=600; )
The Keyword final makes a variable as constant,
Whose value cannot be