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
4451
Why might you be unable to delete a file that is currently open in an application?
Answer:
The file is locked by the operating system to prevent changes while it's in use.
To prevent data corruption, operating systems often lock files that are being accessed by a program.
4452
Which keyboard shortcut allows a user to quickly create a new folder within the active window in Windows Explorer?
Answer:
Ctrl + Shift + N
To efficiently create a new folder in Windows File Explorer without using the mouse, the correct keyboard shortcut is Ctrl + Shift + N. When pressed, this combination instantly generates a new folder named 'New folder' in the currently open directory, ready for the user to rename it immediately. Other options are incorrect: Alt + F4 closes the active window, Ctrl + C copies selected items, and Windows Key + D shows/hides the desktop.
4453
Which type of digital media file is typically identified by the '.mpg' file extension?
Answer:
A video file
The file extension '.mpg' (or '.mpeg') is primarily associated with the Moving Picture Experts Group (MPEG) standard. This standard was developed for the compression and transmission of digital audio-visual data, making '.mpg' files a common format for storing and distributing digital videos. While MPEG standards can involve audio, the '.mpg' extension specifically points to a video container format.
4454
A file named "autoexec.bat" in older versions of Windows (like DOS) was what type of file?
Answer:
A batch file executed automatically at startup
A batch file (".bat") contains a sequence of commands for the command-line interpreter. "autoexec.bat" was a special system file that ran automatically when the computer booted.
4455
Which of the following is a benefit of compressing files before sending them over the internet?
Answer:
It reduces the amount of data to be transferred, saving time and bandwidth
Smaller files take less time to upload and download, which is a major advantage for sharing files online or via email.
4456
Which file operation results in a duplicate of a file or folder in a new location?
Answer:
Copy
The copy operation reads the data from the source file and writes an identical version of it to a new destination, leaving the original file intact.
4457
If a file path starts with a drive letter (e.g., `D:`), you are most likely working on which operating system?
Answer:
Windows
The use of drive letters to represent different storage volumes or partitions is a defining characteristic of the DOS and Windows file systems.
4458
A file with the extension ".xls" or ".xlsx" is typically opened with which application?
Answer:
Microsoft Excel
These extensions are used for spreadsheet files created by Microsoft Excel. ".xls" is the older format, while ".xlsx" is the modern, XML-based format.
4459
If you encounter a file named "install.exe", what is its most probable function?
Answer:
It is an executable file for installing a program.
The ".exe" extension signifies an executable file. A file named "install.exe" is almost certainly a program designed to install software onto a computer.
4460
A file extension is separated from the file name by a:
Answer:
Period
A period separates the main file name from its extension, such as file.txt.