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
261
In Windows, the "Program Files" directory is typically used for:
Answer:
Storing installed application software
By convention, most applications install their program files into the `C:\Program Files` or `C:\Program Files (x86)` directories.
262
What does the extension ".dll" stand for in Windows?
Answer:
Dynamic Link Library
A ".dll" file is a Dynamic Link Library, which contains code and data that can be used by multiple programs at the same time, promoting code reuse and efficiency.
263
What does "execute" permission allow a user to do with a file?
Answer:
Run the file if it is a program or script.
Execute permission is necessary to launch an application or run a script file.
264
Which of the following file types is most likely to use "lossy" compression?
Answer:
A digital photograph (.jpg)
Lossy compression achieves a much greater reduction in file size by permanently removing some of the data that is considered less important. This is acceptable for media files like images, audio, and video, where a slight loss of quality may not be noticeable to the human eye or ear.
265
What is Windows Explorer used to do?
Answer:
Navigate files and folders on the computer
Windows Explorer (renamed File Explorer in newer versions) is the file management application in Windows. Its main purpose is to provide a graphical interface for navigating and managing the files, folders, and drives on your computer.
266
What does "read" permission on a file typically allow a user to do?
Answer:
Open and view the file's contents.
Read permission is the most basic level of access. It allows a user to open a file and see its contents but does not grant them the ability to make any changes to it.
267
What does the "execute" permission allow a user to do?
Answer:
Run the file if it is a program or a script.
Execute permission is necessary to run an executable file (like a program) or to execute a script. For directories, execute permission allows a user to enter the directory and access the files and subdirectories inside it.
268
The command `chmod` in Linux is used to:
Answer:
Change the permissions (mode) of a file
`chmod` (change mode) is the command-line utility used to set or modify the read, write, and execute permissions for the owner, group, and others on a file or directory.
269
To create a new file within a directory, you need which permission on the directory itself?
Answer:
Write
Creating a file is considered a modification of the directory's contents (adding a new entry to its list), so write permission on the directory is required.
270
In the context of computer file formats, what does the acronym PDF signify?
Answer:
Portable Document Format
PDF stands for Portable Document Format. Developed by Adobe Systems, it is a widely used file format designed to present documents consistently across different software applications, hardware, and operating systems. This means a PDF document will look and behave the same regardless of what device or software is used to view it, preserving fonts, images, graphics, and the overall layout.