http://www.allinterview.com Top Assembler Interview Questions en-us http://www.allinterview.com/showanswers/75920.html Base Register is the register, acts as a address holder of the base storage location from where the datas were stored continuously. Assembler uses the Base register value to find the data that is required. http://www.allinterview.com/showanswers/36943.html TRT is used to scan a string of characters, searching for the occurrence of any the characters which are specified in a translate table. TRT also sets the condition code to indicate the results of the scanning operation as follows: http://www.allinterview.com/showanswers/75916.html - JCL PARM //SAMPPROG EXEC PGM=XXXXXXXX,PARM='XXXXXXXX......' CONTAINS A PARM FIELD WITH UP TO 100 BYTES OF DATA IN IT. THE PROGRAM BY DESIGN PICKUPS UP A POINTER TO THE DATA AND THE DATA LEN. REG 1 HAS WHAT YOU NEED TO EXTRAPOLAT http://www.allinterview.com/showanswers/75922.html LA Rx,0 L Rx,=F'0' XR Rx,Rx http://www.allinterview.com/showanswers/98933.html use SYSDUMP in the JCL //SYSDUMP DD * http://www.allinterview.com/showanswers/98928.html ICM means INsert character under mask. its a movement of character under mask bits eg ICM R8,B'0110',SRC Before execution: R8 ==> 12 34 56 78 SRC ==> AB CD EF 10 After Excecution: R8 ==> 12 CD EF 78 http://www.allinterview.com/showanswers/76651.html A SINGLE BASE REGISTER ACCOUNTS FOR 4096 BYTES OF STORAGE. YOU NEED A BASE REG. FOR EACH 4K. IF YOUR PROGRAM IS 12K, YOU NEED AT LEAST 3 BASE REGS. http://www.allinterview.com/showanswers/90838.html R1 contains a fullword that contains a address pointing to tyhe parm data. In pgm before accessing the parm data use L Rn,0(,R1) where n=3,..11 , Rn contains the address that points to parm data. Create DSECT that contains a halfword and the http://www.allinterview.com/showanswers/75921.html Housekeeping is the work done at the start of an ALC program that saves the contents of regs 14,15,0,1,2,3,4,5,6,7,8,9,10,11,12 into an addr off R13. After that and in this example, R15(which contains prog. entry point) is loaded into R12. The http://www.allinterview.com/showanswers/119270.html initalization done by using below code. MVI datafield,C' ' MVC datafield+1(L'datafield-1),datafield http://www.allinterview.com/showanswers/90839.html Use Accept in procedure division. Example : WORKING-STORAGE SECTION. 01 empno. Pic x(05). 01 empname pic x(15). 01 empsal pic 9(10). PROCEDURE DIVISION. ................ PERFORM ACCEPT-PARA. ..... http://www.allinterview.com/showanswers/98934.html S0C7 occurs when the data exception occurs.They are many ways to produce S0C7 1)Move non numeric data to a numeric feild 2)compare junk data with a numeric feild 3) Use a non numeric data in COMPUTE statement 4) Refer to the occurence in a t http://www.allinterview.com/showanswers/75924.html X is used for Alphanumeric and P is used for Packed Decimal. http://www.allinterview.com/showanswers/75918.html THE LENGTH CODE FIELD IS 1 BYTE IN LENGTH. THE LARGEST VALUE YOU MAY SPECIFY IN A 1 BYTE FIELD IS X'FF' X'FF' = 255 DECIMAL THE LEN. IN THE OBJECT CODE FIELD WILL BE 1 LESS THAN ACTUAL LEN. http://www.allinterview.com/showanswers/75923.html USING tells the assembler what your base reg. will be at that point in the code. DROP says to stop using the register coded on the DROP instruction