Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
4341
Which compression format is known for often providing a higher compression ratio than .zip?
Answer:
.rar
The RAR format, associated with the WinRAR program, frequently achieves better compression (smaller file sizes) than the standard Zip format due to its more advanced compression algorithm.
4342
Which file extension would you expect for a presentation created with Microsoft PowerPoint?
Answer:
.ppt or .pptx
".ppt" is the extension for older PowerPoint files, while ".pptx" is the current standard for presentation files.
4343
What does the term "unpacking" or "unzipping" refer to?
Answer:
Extracting the contents of a compressed archive
These terms are synonymous with extraction or decompression—the process of retrieving the original files from within a compressed archive.
4344
The level of compression (e.g., "fastest," "normal," "maximum") in a compression tool is a trade-off between:
Answer:
Processing time and resulting file size
"Maximum" compression will produce the smallest possible file but will take the longest time to process. "Fastest" compression will run very quickly but the resulting file will be larger.
4345
A "file path" is:
Answer:
The sequence of directories that leads to a specific file or folder.
A file path provides the exact location of a file within the directory structure, starting from the root.
4346
In the path `/home/user/pictures/vacation.jpg` on a Linux system, what is the "pictures" directory?
Answer:
A subfolder of the "user" directory.
In this path, "pictures" is a subdirectory located inside the "user" directory, which itself is a subdirectory of the "home" directory.
4347
Which permission is meaningless for a binary file but crucial for a directory?
Answer:
Execute
While execute on a file means "run it," execute on a directory means "traverse it" or "enter it." You cannot list the contents of a directory or access files within it without execute permission on that directory.
4348
What is a "parent directory"?
Answer:
The directory that is one level above the current directory in the hierarchy
In the path `/Users/guest/Documents`, the parent directory of `Documents` is `guest`. The `..` notation is often used as a shortcut to refer to the parent directory.
4349
What is a common way to select multiple files at once for a file operation?
Answer:
Holding down a key like Ctrl or Shift while clicking on the files.
These modifier keys are standard conventions in graphical user interfaces for selecting multiple items.
4350
If a user has "write" permission for a file, what can they do?
Answer:
Modify or delete the file's contents.
Write permission allows a user to alter the data within a file. This includes adding, changing, or deleting content. In many systems, write permission on a directory also allows for the creation and deletion of files within it.