AS400 Interview Questions • AS400 Question Bank

<div dir="ltr" style="text-align: left;" trbidi="on"><div class="separator" style="clear: both; text-align: center;"><h2 style="clear: both;"><span style="font-size: large;">AS400 Interview Questions • AS400 Question Bank</span></h2><div class="separator" style="clear: both;"><br /></div><div class="separator" style="clear: both;"><br /></div><h3 style="clear: both;"><span style="font-size: large;">AS-400, AS400 iSeries Interview Questions and Answers,Mainframe AS-400 Interview Questions and Answers</span></h3></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPdiS_unrBlFtRjqXAjDC9YAoLelAxHhRsr-uZubs4kzBS-pIZfVYH6LHeiRdtKJ_WAW-y6GSXMLv0jyWN17wBgqNzAVqzcz60RHNpnP3-gT6XHk0XC7tAvYdaLEsSBlrildOeVtOCV2Y/s1600/as400_questions_answers.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="213" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPdiS_unrBlFtRjqXAjDC9YAoLelAxHhRsr-uZubs4kzBS-pIZfVYH6LHeiRdtKJ_WAW-y6GSXMLv0jyWN17wBgqNzAVqzcz60RHNpnP3-gT6XHk0XC7tAvYdaLEsSBlrildOeVtOCV2Y/s1600/as400_questions_answers.jpg" width="320" /></a></div><br /><br /><span style="font-size: large;"><b>What the purpose of the keywords FIFO, LIFO, FCFO?</b><br />Ans: These keywords are used at file level. The purpose of each one is described below:<br />FIFO: The duplicate key records will retrieved in first in first out order.<br />LIFO: The duplicate key records will retrieved in last in first out order.<br />FCFO: The duplicate key records will retrieved in first changed first out order.<br /><br /><b>Why is AS/400 called an Object Oriented Machine ?</b><br />Ans: Everything on the AS/400 system that can be stored or retrieved is contained in an Object. Object exist to make users independent of the implementation techniques used in the machine.<br /><br /><h3 style="text-align: left;">Join logical file in as400 • Field Reference file in as400</h3><br /><b>What is the difference between regular logical file and join logical file?</b><br />Ans: Regular logical file contains more than one record format.<br />Record format name in regular logical file should be same based on the physical file.<br />Join logical file contains only one record format.<br />Record format name in join logical file should be different.<br />Through logical file we can made changes in physical file.<br />Through join logical file we can't made changes in physical file.<br /><br />Distinguish between logical file and physical file?<br />Ans: Physical file contains only one record format.<br />Logical file contains more than one record format.<br />Physical file contains actual data.<br />Logical file doesn't contains data but it provides view from the physical file.<br /><br />What is field reference file?<br />Ans: Field reference file is a file, which contains field definitions and descriptions, and it doesn't have member. Physical contains data derived by the field reference file.<br /><br />What is the difference between access path and Dynamic select?<br />Ans: Dynamic select occurs whenever the program reads file. But access path occurs before the file is read (but not necessarily). Because access path maintenance performed on the file.<br /><br />Why would you prefer OPNQRYF than logical file?<br />Ans: The main difference is : Logical file creates permanent object on the system. OPNQRYF creates temporary access path.<br /><br />What is the necessary keyword used in a physical file to refer field definitions from the field reference file?<br />Ans: REF which is a file level keyword is necessary to define at file level in a physical file. The syntax is as follows: REF(library name/name of the field reference file)<br /><br />What is purpose of declarative statement DEFN?<br />Ans: Depends on the factor 1 value it will do two things:<br />* If the factor1is *LIKE then DEFN opcode defines the new field based on the attributes old field. * If the factor 1 is *NAMVAR then DEFN opcodes defines the field as a data area.<br /><br />What is the purpose of SFLNXTCHG keyword in a subfile?<br />Ans: Which is a subfile record format keyword. If you perform read on the subfile, the<br />internal indicator MDT (modified data tag) is automatically set off by the system. If you again perform read on the<br />same records, records won't be read. Because internal indicator MDT would be off. Hence you should be explicitly set<br />on the MDT by SFLNXTCHG keyword.<br /><br />What is the difference between Array and Table?<br />Ans:<br />Array: Array is stored any where in the body of the input records.<br />Table: Table is stored at the beginning of the input records.<br />Array: We can access all the elements in array by specifying the array name.<br />Table: Only one table element can be accessed at a time.<br />Array: Array can be searched randomly.<br />Table: Table can be searched consecutively.<br /><br />What are the different types of access paths maintained on the file?<br />Ans:<br />Immediate: All the access paths (open and close) associated with a file will be updated whenever changes made to a file.<br />Rebuild- only open access paths will update whenever changes made to the file. Rebuild takes place whenever remaining access paths will be open.<br />Delay : Rebuild will not takes place.<br /><br />What is the purpose of reorganizing the physical file i. e. , RGZPFM?<br />Ans: Even if you delete the records in a physical file through the program, still the space used by the deleted records not used by the other purpose. Hence using RGZPFM command we can compress the deleted records space.<br /><br />What is the purpose of CHGPF (Change physical file) command?<br />Ans: CHGPF command is used to change the attributes of a physical file. Attributes like<br />* Maximum number of members<br />* Member size<br />* Level check enforced<br />* Open data path is shared<br /><br /><br /><br /><br />What are the communication protocols supported by AS/400 ?<br />Ans: APPC (Advanced Program to Program Communication)<br />BSCEL(Binary Synchronous Link)<br />ASYNCH(Asynchronous Communication)<br />RETAIL<br />TCP IP<br />FINANCE<br />SNUF SNA Upline facility<br />INTRA Intrasystem communication.<br /><br /><br />What are the different ways of connecting a terminal to a system ?<br />Ans: Twinnax, Workstation, ASCII and OS/2 Workstation.<br /><br /><br />How can you identify End of file in CLP program?<br />Ans: With the help of MONMSG MSGID(CPF0864) we can identify end of file in clp program.<br /><br />What is the difference between production library and test library ?<br />Ans: In debug mode, the files exists in production library not allowed to update.<br />In the other hand, the files exists in test library allowed to update.</span><br /><br /><br /><div dir="ltr" style="font-family: Helvetica, Arial, sans-serif; font-size: 14px;" trbidi="on"><span style="font-family: helvetica; font-size: large; line-height: 18.2px; text-align: justify;">Jobklix provides you recruitment notifications only you should refer official website of related department. 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AS400 Interview Questions • AS400 Question Bank

AS400 Interview Questions • AS400 Question Bank AS-400, AS400 iSeries Interview Questions and Answers,Mainframe AS-400 Interview Questions a...

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