There are two common types for data access or retrieval
1. Sequential access is the main access mode only in batch systems, whereas files are used and updated at regular intervals.
2. Direct access - on-line processing requires direct access, whereby a record can be accessed without accessing the records between it and beginning of the file.
Answer:
All of the files are stored on a hard-drive. Except for the files you just viewed before turning off the computer, which is stored in the RAM (Random Access Memory). If your computer is a desktop, and the power goes out while looking at a photo/pdf, you may corrupt/lose the image if the computer didn't have enough time to store it in the hard drive. Everything in the hard drive is 'scratched' into it like a record. If you delete a file, that part of the disk is 'smoothed' as best as it can. If you upload another file, you might corrupt/ruin the image/pdf. Think of the smoothing like recording a football game over an old VHS of Winne the Pooh. If you have any other questions, please ask by commenting on this answer!
The tools that would be used to make header 1 appear and look like header 2 is the alignment tool icon and the Bold tool icon.
To understand this question, we must understand the interface of the Microsoft Excel.
<h3>What is Microsoft Excel?</h3>
Microsoft Excel is a spreadsheet that can be used for a variety of features such as:
- Computation of Data sets and variables
- Calculation of Business Data
- Arrangement and Analysis of Data into Tables etc.
As a Microsoft software, Microsoft Excel can also be used to edit sheets. In the image attached, the required tool icons needed to change the header 1 into header 2 is the alignment tool icon and the Bold tool icon.
The two tools can be seen in the image as the two lower left icons.
Learn more about Microsoft Excel here:
brainly.com/question/25863198
