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
4261
What operation does the `touch` command in Linux perform?
Answer:
It creates a new, empty file if it doesn't exist, or updates the timestamp if it does
The `touch` command is a quick way to create a blank file or to update a file's last access and modification times without changing its content.
4262
Lossy compression is most suitable for which type of data?
Answer:
Media files like images, audio, and video
With multimedia, a small loss of data is often imperceptible to humans but can result in a significant reduction in file size. For text or program files, losing even a single bit of data would corrupt the file.
4263
Which of the following is a valid file name in Windows?
Answer:
My\_File-2025.txt
This file name only uses allowed characters, including letters, numbers, an underscore, and a hyphen. "CON" is a reserved name, and the other options use forbidden characters (\<, \>, ").
4264
A file named "program.exe" is most likely what type of file?
Answer:
An executable file
The ".exe" extension stands for "executable" and is used for programs or applications that can be run on a Windows-based computer.
4265
What is the primary goal of file compression?
Answer:
To reduce the file's size on a storage device
Compression algorithms work by finding and eliminating redundancy in data, which allows the file to be stored using less disk space.
4266
Can a compressed archive contain more than one file?
Answer:
Yes, archives can contain multiple files and even entire directory structures.
A key feature of archive formats like .zip is the ability to bundle multiple files and folders into a single compressed file. This is very useful for distributing groups of related files.
4267
The special directory `.` (single dot) refers to:
Answer:
The current directory
The single dot is a universal shortcut in command-line interfaces to refer to the current working directory. For example, `./script.sh` runs a script in the current folder.
4268
When you "delete" a file in a graphical user interface, where does it typically go first?
Answer:
It is moved to the Recycle Bin or Trash.
This is a safety feature that allows users to recover accidentally deleted files.
4269
If you "rename" the file `report.txt` to `final_report.txt`, what happens to the file's contents?
Answer:
The contents remain unchanged.
Renaming a file only changes its name; the data within the file is not affected.
4270
The `/home` directory in Linux serves a similar purpose to which directory in Windows?
Answer:
`/Users`
Both `/home` in Linux and `/Users` in Windows are the parent directories that contain the individual home directories for each user account on the system.