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

best compression for UNIX files

  1. zipplus

  2. winrar

  3. winzip

  4. gzip
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gzip is the standard compression utility for Unix/Linux systems. Unlike Windows-centric tools like WinRAR or WinZip, gzip is natively integrated into Unix environments and is the go-to tool for compressing and decompressing files in the Unix ecosystem.

Multiple choice technology embedded technologies

Which of the following is the format in which logging is made in Trace & Error log:

  1. file name : process name : timestamp : line : trace group : logged message

  2. timestamp : file name : process name : line : trace group : logged message

  3. timestamp : process name : file name : line : logged message : trace group

  4. timestamp : process name : file name : line : trace group : logged message
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The standard Trace & Error log format begins with timestamp for chronological ordering, followed by process name for multi-process systems, then the file name and line number for precise source location, the trace group for categorization, and finally the actual logged message. Options A and B are incorrect because they don't start with timestamp. Option D incorrectly places trace group before the message.

Multiple choice technology embedded technologies

Which of the following is the format in which logging is made in Trace & Error log:

  1. file name : process name : timestamp : line : trace group : logged message

  2. timestamp : file name : process name : line : trace group : logged message

  3. timestamp : process name : file name : line : logged message : trace group

  4. timestamp : process name : file name : line : trace group : logged message
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The TPF Trace & Error log format structures entries chronologically starting with timestamp, followed by file name, process name, line number, trace group, and finally the logged message. This standardized format allows for systematic parsing and analysis of diagnostic information. Option B correctly presents this sequence: timestamp:file name:process name:line:trace group:logged message.

Multiple choice technology operating systems

What is inode?

  1. File status indicator

  2. It is stored in both disk and memory and tracts file status

  3. There is one inode for each file on the system

  4. All the above

  5. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An inode is a data structure that stores file metadata (permissions, size, timestamps, location). Every file has exactly one inode. Inodes exist both on disk (persistent storage) and in memory (when files are accessed). Therefore all descriptions A, B, and C are correct aspects of inodes.

Multiple choice technology operating systems

I want to send a file as an attachment to my mailserver from my unix server using mailx. Which of the following will help me create the file as attachment?

  1. uuencode coomand

  2. attach command

  3. compress command

  4. Its not possilble to send attachment from unix
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The uuencode command converts binary files to ASCII format, allowing them to be sent as email attachments through the mailx utility. When piped to mailx, it properly formats the file as an attachment rather than inline text, which is the traditional Unix method for email attachments.

Multiple choice technology operating systems

What is the importance of +x rights given to a directory?

  1. The +x right is meaningless for directory

  2. To give permission to other users

  3. To move into that directory

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The execute (+x) permission on a directory grants the ability to enter (cd into) that directory and access files within it by name. Without +x on a directory, even if you have read/write permissions on files inside, you cannot traverse the directory path to reach those files. It does not grant permissions to other users specifically.

Multiple choice technology operating systems

Unlike Windows, in UNIX we cannot create a directory named 'a box' i.e. space is not allowed in UNIX for file and directory naming.

  1. True

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

Unix does allow spaces in file and directory names, though they require special handling with quotes or escaping. The statement claims Unix cannot use spaces, which is false. Option B is correct because Unix filenames can contain spaces, unlike the statement suggests.

Multiple choice technology testing

What is the file name extension for Recovery Scenerio?

  1. name.tsr

  2. name.prs

  3. name.qrs

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

Recovery Scenario files in QTP (QuickTest Professional) use the .qrs file extension. QTP is a functional testing automation tool, and Recovery Scenarios are used to handle unexpected errors or events during test execution. The .qrs extension specifically identifies these recovery configuration files. The other extensions (.tsr, .prs, .trs) are not associated with QTP Recovery Scenarios.

Multiple choice technology

What file is responsible for storing the stock information

  1. stock.sdf

  2. stock.fdf

  3. stock

  4. stock.sds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The .sdf (SQL Database File) extension is used for storing structured data, including stock information in handheld systems. Other extensions like .fdf, .sds, or no extension are not standard database file formats used for this purpose in the context.

Multiple choice technology mainframe

What is file status 92?

  1. File is opened for input and an attempt is made To write to it (or Logic error).

  2. Mismatch in LRECL or BLOCKSIZE or RECFM between your COBOL pgn and the JCL ( or the dataset label).

  3. Attempted to open a file that is already open.

  4. File not found.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

File status 92 indicates that the file was opened for input and a write operation was attempted, which is a logic error. The first option correctly describes this condition, so the stored answer is right.

Multiple choice technology mainframe

What is the file status for File not found.

  1. 4

  2. 6

  3. 13

  4. 35
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

File status code 35 in COBOL indicates 'File not found' when attempting to open a file that doesn't exist. Other common file status codes include 00 (success), 04 (wrong length record), 06 (record duplicate key), 13 (file not found), and 30 (permanent error). The specific code 35 is the standard COBOL file status for a non-existent file on OPEN. This is a fundamental concept in COBOL file handling.

Multiple choice technology mainframe

What is file status 92?

  1. Password failure

  2. Resource not available

  3. Logic error

  4. No DD statement specified for this file
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In COBOL file status codes, 92 indicates a logic error occurred during file processing. This is a catch-all error code for problems that stem from programming logic rather than physical file issues or resource constraints.

Multiple choice technology mainframe

What is file status 41?

  1. An OPEN statement was attempted for a file in the open mode

  2. A CLOSE statement was attempted for a file not in the open mode

  3. An OPEN statement was attempted on a file previously closed with lock

  4. The execution of a WRITE statement was attempted on a file not open in the I-O, output, or extend mode
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

File status 41 indicates that an OPEN statement was attempted for a file that is already in the open mode. This is a logical error because a file cannot be opened again while it's already open - it must be closed first before being reopened.