Computer Applications

The default save type of a newly created spreadsheet depends on the spreadsheet software being used. In popular open-source office suites such as LibreOffice Calc or OpenOffice Calc, the default file format is the ODF spreadsheet format. ODF stands for Open Document Format, which is an internationally recognized open standard for office documents including text documents, spreadsheets, and presentations. The ODF format has the file extension \texttt{.ods} for spreadsheets. This format ensures compatibility and easy sharing across different platforms and office software that support the open standard. It is designed to avoid vendor lock-in and promote interoperability. Other options such as dBase (used primarily for database files), Microsoft Excel format (commonly \texttt{.xls} or \texttt{.xlsx}), and Office Open XML spreadsheet (the newer Microsoft Excel default format \texttt{.xlsx}) are proprietary or different standards. These are not the default in open-source spreadsheets, which prefer ODF. Therefore, the correct answer is (A) ODF spreadsheet.

To select a range of cells in a spreadsheet:

Click on the first cell of the range you want to select.
Hold down the left mouse button and drag the cursor to the last cell of the desired range.
Release the mouse button; the entire range will be highlighted.
Alternatively, click the first cell, hold the \texttt{Shift} key, and click the last cell to select all cells in between.

Scanners, like other electronic devices, can face various faults that affect their performance. Common faults in scanners include:

Dirty Scanner Glass or Mirrors: Dust, fingerprints, or smudges on the scanning surface or internal mirrors cause blurred, dirty, or streaked images. This is a frequent cause of poor scan quality.
Scanner Head Malfunction: The scanner head, which moves across the document to capture the image, can get stuck or fail, leading to incomplete scans or lines missing from the image.
Mechanical Jams: Paper or documents can get jammed inside the scanner, preventing it from operating and possibly damaging internal parts.
Connection Issues: Faulty or loose cables, improper driver installation, or software conflicts can cause the scanner not to respond or fail to communicate with the computer.
Software Errors: Incorrect scanner settings, outdated drivers, or incompatible scanning software can cause errors during scanning or improper image capture.
Electrical Faults: Power supply issues or internal electronic failures can prevent the scanner from powering on or functioning correctly.
Regular cleaning, proper handling, correct software installation, and preventive maintenance help reduce these faults and extend scanner life.