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
4401
The "save" operation in an application is an example of which fundamental file operation?
Answer:
Write
When you save a file, you are writing data (either new or modified) from the application's memory to the storage device.
4402
In a Windows file system, what does "C:" typically represent?
Answer:
" typically represent?
In Windows, drive letters followed by a colon and a backslash (e.g., `C:\`) denote the root directory of a specific volume or partition. `C:` is traditionally the primary system drive.
4403
Which file extension is used for a standard presentation file created with Microsoft PowerPoint?
Answer:
.pptx
The ".pptx" extension is the standard format for presentations created in Microsoft PowerPoint since the 2007 version.
4404
Hiding a file extension in an operating system's file explorer can be a security risk because:
Answer:
It can make a malicious file (e.g., "virus.txt.exe") appear as a harmless one ("virus.txt")
Attackers can disguise executable files as documents or images. If extensions are hidden, a user might double-click what they believe is a text file, but is actually an executable program.
4405
Which type of software application primarily utilizes files with the '.xls' extension?
Answer:
Spreadsheet documents
The '.xls' file extension is historically associated with Microsoft Excel, which is a spreadsheet program. These files contain worksheets organized into rows and columns, used for data entry, calculations, charting, and various other data analysis tasks. While newer versions of Excel use '.xlsx', the '.xls' format was the standard for Excel workbooks from versions 97 through 2003 and remains widely compatible.
4406
What is the primary benefit of file compression?
Answer:
To reduce the file size.
Compression algorithms work by reducing redundancy in the data, which makes the file smaller.
4407
When you "delete" a file on most modern operating systems with a GUI, where does it typically go first?
Answer:
It is moved to a temporary holding area like the Recycle Bin or Trash
The Recycle Bin (Windows) or Trash (macOS) acts as a safety net, allowing users to easily restore accidentally deleted files before they are permanently removed.
4408
What does the "read" operation allow you to do with a file?
Answer:
View its contents.
The read operation involves accessing the data within a file to display it or load it into memory.
4409
Which action is NOT a standard file operation?
Answer:
Compile
Compiling is a process specific to programming where source code is translated into machine code. It is not a fundamental file system operation like creating, reading, or deleting.
4410
The concept of "inheritance" in file permissions means that:
Answer:
New files and subfolders created within a directory can automatically get permissions from that parent directory
Inheritance simplifies permission management. By setting permissions on a top-level folder, you can have them automatically apply to all new items created inside it.