Computer Knowledge

Computer File Systems

1,249 Questions

Computer file systems dictate how data is stored, organized, and retrieved on storage devices. Important concepts include file allocation tables, access mechanisms, and various formats like sequential and video files. Candidates preparing for banking and government exams should practice these fundamentals thoroughly.

File access mechanismsVideo and password filesFile extensionsFile allocation tableSystem metadata

Computer File Systems Questions

Multiple choice technology operating systems

how do we make a file hidden in unix?

  1. prefix the name of file with a '.' <dot>

  2. prefix the name of file with a '~' <tilt>

  3. by changing its permissions

  4. Any of the Above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Unix-like systems, files are hidden by prefixing their names with a dot (.). Hidden files are not shown by default in directory listings (ls command). Options like tilde (~) or changing permissions don't create hidden files in Unix.

Multiple choice technology databases

Which of the following attachments are NOT supported by BES?

  1. .doc

  2. .xls

  3. .rtf

  4. .jpg
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

BES supports .doc, .xls, and .jpg attachments for wireless delivery. However, .rtf (Rich Text Format) is not supported by the BlackBerry Attachment Service, as it uses a proprietary format that requires specific handling not available in the standard BES attachment filtering.

Multiple choice technology enterprise content management

There will be one component in the componentlist for each component definition file in the application.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The component list maintains a one-to-one correspondence with component definition files in the application. Each definition file results in exactly one component entry in the component list, ensuring systematic tracking and management of all components.

Multiple choice technology enterprise content management

Component definition files are found in the {virtual root}\config directory or subdirectories.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Component definition files are not located in the {virtual root}\config directory. They are typically found in other designated locations within the framework's directory structure, such as component-specific directories or other configuration areas, not the general config directory.

Multiple choice technology programming languages

10.Compilation of mxml file gives

  1. mxml file

  2. swf file

  3. as file

  4. Don't know
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Compiling an MXML (Magic XML) file in the Adobe Flex framework produces a SWF (Shockwave Flash) file, which is the final compiled bytecode executable run by Flash Player. Distractors like mxml or as (ActionScript) files represent raw source code inputs rather than the compilation outputs.

Multiple choice technology architecture

What files does a differential backup save ?

  1. All files irrespective of whether they were changed or not

  2. All files that were changed or added since the last full backup

  3. All files that were not saved during the previous incremental backup

  4. All files that were added since the last differential backup
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A differential backup saves all files that have changed since the last FULL backup (not since the last differential). Unlike incremental backups which only save changes since the last backup (full or incremental), differential backups accumulate all changes since the full backup, making restoration faster but requiring more storage space.

Multiple choice technology

Which two statements describe both File Sets and Data Sets? (Choose two.)

  1. File and Data Sets preserve partitioning.

  2. File and Data Sets are stored in internal format.

  3. File and Data Sets contain header file and data files.

  4. File and Data Sets are readable by external applications.
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

File Sets and Data Sets both preserve partitioning metadata and consist of header files plus data files. They maintain how data is partitioned across nodes, which is crucial for parallel processing. Neither is stored in human-readable format (they use internal formats), and neither is directly readable by external applications without proper interfaces. Options A and C correctly describe these shared characteristics.

Multiple choice technology

Which three statements are true about File Sets? (Choose three.)

  1. File sets are partitioned.

  2. File sets are unpartitioned.

  3. File sets are stored as a single file.

  4. File sets are readable by external applications.

  5. File sets are stored as header file and data files.
Reveal answer Fill a bubble to check yourself
A,D,E Correct answer
Explanation

File Sets in DataStage are partitioned storage structures that can be read by external applications because they store data in native file format with a separate header file describing the schema. This makes them different from Data Sets (which are proprietary). Option B is wrong because File Sets are explicitly partitioned. Option C is wrong because they consist of multiple files, not a single file.

Multiple choice technology

Mr.X have a Job created where the target is a File Stage, the File Update Mode= CREATE, but the file name mentioned in the stage is already existing in the Folder(which is also created by Mr. X). When Mr. X runs the Job, the job will over write the existing file?

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When File Update Mode is set to CREATE in DataStage, the job will abort if the file already exists. CREATE mode expects the file to not exist; to overwrite an existing file, you would need to use OVERWRITE mode instead.

Multiple choice technology

Can you look up a flat file using informatica?

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Informatica Lookup transformation supports flat files as lookup sources. You can configure a flat file as a lookup cache source or use a connected lookup with a flat file source definition.

Multiple choice technology mainframe

KSDS file is loaded

  1. Sequentially with descending order of the key

  2. Sequentially with ascending order of the key

  3. Randomly with descending order of the key

  4. Randomly with ascending order of the key
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To perform an initial load on a VSAM KSDS, records must be loaded sequentially in ascending order based on the prime key. Attempting to load randomly or out of order during initialization causes errors.

Multiple choice technology mainframe

How are EXPORT and REPRO files different

  1. EXPORT stores data in a compressed format. REPRO stores data uncompressed.

  2. EXPORT and IMPORT are terms that are part of the REPRO command so there is actually no difference

  3. EXPORT files contain the data and index portion of the data set. REPRO files contain only the data portion

  4. EXPORT files contain all of the data set components, including attributes. REPRO files contain only the data
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

EXPORT creates a backup file containing both data and index components, preserving the complete VSAM dataset structure. REPRO only copies the data portion. This distinction matters for recovery and migration - EXPORT maintains the full dataset including indexes, while REPO is a simpler data copy operation. Option A incorrectly describes compression differences, Option B falsely claims they're the same, and Option D incorrectly attributes component differences.

Multiple choice technology mainframe
  1. Which clause can be used instead of checking for FILE STATUS = 10?

  1. RECORD NOT FOUND

  2. AT END

  3. DUPLICATE RECORD

  4. END OF FILE
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The AT END clause in COBOL is specifically designed to handle end-of-file conditions and can be used instead of explicitly checking FILE STATUS = 10. When a sequential file reaches EOF, the AT END clause executes, making it a cleaner alternative to FILE STATUS checking. RECORD NOT FOUND, DUPLICATE RECORD, and END OF FILE are not COBOL clauses that serve this purpose.