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
71
To extract files from a `.rar` archive, you typically need which software?
Answer:
A program that specifically supports the RAR format, like WinRAR or 7-Zip
While Windows has built-in support for the .zip format, the proprietary .rar format requires specific third-party software to be installed for extraction.
72
You download a single file named `software.zip`. After extracting it, you find a folder containing `setup.exe` and `readme.txt`. The .zip file is an example of:
Answer:
An archive used for distribution
Compression is widely used to package software and other collections of files into a single, smaller file for easier downloading and distribution.
73
A file named "setup.msi" is an installer package for which operating system?
Answer:
Windows
The ".msi" extension signifies a Microsoft Installer package, a database of installation information used for installing, maintaining, and removing software on Windows.
74
A folder that is located inside another folder is called a:
Answer:
Subfolder or subdirectory
Subfolders (or subdirectories) are used to organize files within a parent folder, creating the levels of the directory hierarchy.
75
A major disadvantage of lossy compression is:
Answer:
There is a permanent reduction in the quality of the file.
The trade-off for a smaller file size in lossy compression is that some of the original data is permanently discarded.
76
Renaming a file extension (e.g., from `.txt` to `.dat`) performs which operation?
Answer:
It performs a rename operation, but does not change the file's content
This is simply a rename operation. The underlying data of the file is not altered, although the OS may now try to open it with a different default program.
77
What does the ".." notation typically represent in a command-line interface?
Answer:
The parent directory
The double-dot `..` is a standard shortcut to refer to the directory one level up in the hierarchy.
78
The "create" file operation typically involves:
Answer:
Allocating space on the disk and making an entry in the directory structure
When a new file is created (e.g., by saving a document), the file system finds available space on the storage device and adds a record for the new file in the appropriate directory.
79
Which type of file contains data in an indexed and cross-linked format?
Answer:
Help
Help files are often structured in an indexed and cross-linked format to provide information on software functions.
80
What does the `~` (tilde) character represent in a Linux or macOS command line?
Answer:
The current user's home directory
The tilde is a shortcut that expands to the absolute path of the logged-in user's home directory (e.g., `/home/username`).