Computer File Systems

In COBOL file status key values, '35' indicates that the specified file is not found or is an empty optional file that cannot be opened, representing the 'Empty File' error condition.

The question asks about file locking with retention. Option A states there is no lock system with retention period, which is correct in the context described. The other options describe incorrect behaviors.

CMR10 supports cloning files in both thin (shared blocks) and thick (full copy) modes, supports a minimum of 2000 clones, and clones must be writable. Since all these features are supported, Option D 'All the above' is correct.

PDF stands for Portable Document Format, which is a file format developed by Adobe to present documents in a manner independent of application software, hardware, and operating systems. The other options (Pushable, File for Document, Printable) are incorrect expansions of the acronym.

All three file organization types (INDEXED, RELATIVE, and SEQUENTIAL) can be opened in all four modes (INPUT, I-O, OUTPUT, EXTEND) in COBOL. This flexibility allows programmers to choose the most appropriate file organization for their data access needs while maintaining full operational capability.

In COBOL, BLOCK CONTAINS 0 with SEQUENTIAL organization indicates a Fixed Block record format. This configuration tells the system that records are fixed-length and blocked. Option B (Fixed Unblock) would omit the BLOCK CONTAINS clause or specify BLOCK CONTAINS 1.

QTP uses XML format for exporting and importing object repositories, making them human-readable and editable. MTS, TSR, and XLS are not used for object repository operations - TSR is a file extension, not the format itself.

QuickTest Professional (QTP) supports multiple file extensions for function libraries, including .qfl, .vbs, or even files with no extension at all. .bat files are batch execution files and are not supported as QTP function libraries.

TSR is the file extension for shared object repository files in QTP. MTR and MTS are not QTP file extensions, and QFL is for function libraries, not object repositories.

ESDS (Entry Sequenced Data Set) files do not allow record deletion - records can only be added sequentially. This is a fundamental characteristic of ESDS organization in VSAM. Normal delete processes won't work, and you cannot delete even with random reads.

To open a file for writing in COBOL, you can use OUTPUT mode (creates new or truncates existing) or EXTEND mode (adds to end of existing file). INPUT (A) is for reading only. I-O (B) is for reading AND writing existing records, not pure writing. Option C incorrectly includes I-O.

The /etc/shadow file contains encrypted passwords. In modern Unix systems, password information is split: /etc/passwd contains public user information (username, UID, GID, home directory, shell) and is world-readable, while /etc/shadow contains sensitive data including encrypted passwords and is readable only by root. The 'one character' mentioned in the question likely refers to the 'x' placeholder in /etc/passwd which indicates the password is stored in /etc/shadow. The .rch extensions are not standard Unix files.

The tar (tape archive) command is used to archive files in Unix/Linux. It combines multiple files into a single archive file without compression by default. The compress and gzip commands are used for compression of individual files, not for creating archives. The -z flag with tar (tar -czf) creates compressed archives using gzip. There is no standard 'archive' command in Unix. The word 'commad' in the question is a typo for 'command'.

In LoadRunner Controller, scenario groups use .usr files which contain the Vuser script and configuration. .lrr is for scenario results, .lra is for analysis files, and .lrs is for scenario files. The .usr file is the correct choice for defining Vuser groups in scenarios.