Saving and file formats (xlsx, csv) in Excel - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the file extension .xlsx stand for in Excel?

.xlsx is the default file format for Excel workbooks. It stands for Excel Spreadsheet and stores data, formulas, formatting, and multiple sheets in a compressed file.

beginner

What is a CSV file and when would you use it?

A CSV (Comma-Separated Values) file stores data as plain text with values separated by commas. It is used to share simple data between programs because it is lightweight and easy to open in many applications.

beginner

True or False: Saving an Excel file as CSV keeps all formulas and formatting intact.

False. When saving as CSV, only the raw data is saved. Formulas, formatting, and multiple sheets are lost because CSV is a plain text format.

beginner

Why might you choose to save a file as .xlsx instead of .csv?

Save as .xlsx to keep formulas, formatting, charts, and multiple sheets. .csv only saves plain data without these features.

beginner

How do you save an Excel workbook as a CSV file?

Go to File > Save As, choose the location, then select CSV (Comma delimited) (*.csv) from the file type dropdown, and click Save.

Which file format keeps Excel formulas when saving?

A .txt

B .csv

C .xlsx

D .pdf

.xlsx keeps formulas. CSV and TXT save only raw data. PDF is for viewing, not editing formulas.

What happens to formatting when saving as CSV?

A Formatting is lost

B Formatting is saved

C Only colors are saved

D Only fonts are saved

CSV files do not save any formatting; only plain data is saved.

Which format is best for sharing simple data with other programs?

A .csv

B .pptx

C .docx

D .xlsx

CSV is widely supported and easy to open in many programs, making it ideal for simple data sharing.

If your workbook has multiple sheets, which format keeps all sheets when saving?

A .csv

B .txt

C .html

D .xlsx

.xlsx supports multiple sheets. CSV saves only one sheet at a time.

Where do you select the file format when saving in Excel?

A File > Open

B File > Save As

C Home > Clipboard

D Insert > Table

You choose the file format under File > Save As.

Explain the differences between saving an Excel file as .xlsx and .csv.

Think about what each format can and cannot keep.

Describe the steps to save an Excel workbook as a CSV file.

Focus on the menu path and file type selection.

Practice

1. Which file format should you choose to save an Excel file if you want to keep all formulas, formatting, and multiple sheets?

easy

A. .pdf

B. .csv

C. .txt

D. .xlsx

Solution

1. Step 1: Understand file format features

   .xlsx supports formulas, formatting, and multiple sheets, while .csv only stores plain data.

2. Step 2: Match requirement to format

   Since you want to keep all Excel features, .xlsx is the correct choice.

3. Final Answer:

   .xlsx -> Option D

4. Quick Check:

   Full Excel features = .xlsx [OK]

Hint: Use .xlsx to keep all Excel features intact [OK]

Common Mistakes:

• Choosing .csv and losing formulas
• Saving as .txt which loses formatting
• Using .pdf which is not editable

2. Which of the following is the correct way to save a file as CSV in Excel?

easy

A. File > Save As > Choose .xlsx format

B. File > Save As > Choose .csv format

C. File > Export > Choose .pdf format

D. File > Save As > Choose .txt format

Solution

1. Step 1: Locate saving options in Excel

   To save as CSV, you use the Save As option and select the CSV format from the dropdown.

2. Step 2: Identify the correct format choice

   Choosing .csv saves the file as comma-separated values, suitable for plain data sharing.

3. Final Answer:

   File > Save As > Choose .csv format -> Option B

4. Quick Check:

   Save as CSV = Save As + .csv [OK]

Hint: Save As and pick .csv to export plain data [OK]

Common Mistakes:

• Selecting .xlsx instead of .csv
• Using Export > PDF instead of Save As
• Choosing .txt which is not CSV

3. You save an Excel sheet with formulas as .csv and then open it again. What will happen to the formulas?

medium

A. Formulas will be saved as text strings

B. Formulas will be preserved and editable

C. Formulas will be converted to their last calculated values

D. File will not open because CSV does not support formulas

Solution

1. Step 1: Understand CSV format limitations

   CSV files store only plain text data, no formulas or formatting.

2. Step 2: What happens to formulas when saved as CSV

   Excel saves the last calculated values of formulas, not the formulas themselves.

3. Final Answer:

   Formulas become their last calculated values -> Option C

4. Quick Check:

   CSV saves values, not formulas [OK]

Hint: CSV saves values only, formulas become static numbers [OK]

Common Mistakes:

• Thinking formulas stay editable in CSV
• Assuming formulas save as text
• Believing CSV files won't open

4. You saved your Excel file as .csv but notice that some data with commas got split into multiple columns. How can you fix this issue?

medium

A. Replace commas in data with another character before saving as CSV

B. Save the file as .xlsx instead to keep data intact

C. Open CSV in a text editor and remove commas manually

D. Save the file as .txt to avoid splitting

Solution

1. Step 1: Understand CSV comma delimiter issue

   CSV uses commas to separate columns, so commas inside data cause unwanted splits.

2. Step 2: Fix data before saving

   Replacing commas inside data with another character (like semicolon) prevents splitting when saved as CSV.

3. Final Answer:

   Replace commas in data before saving as CSV -> Option A

4. Quick Check:

   Commas inside data break CSV columns, replace them [OK]

Hint: Replace commas inside data before saving CSV [OK]

Common Mistakes:

• Just saving as .xlsx without fixing data
• Manually editing CSV text which is error-prone
• Saving as .txt which doesn't solve comma issue

5. You have a large Excel workbook with multiple sheets, formulas, and formatting. You need to share only the raw data from one sheet with a colleague who does not use Excel. What is the best way to save and share this data?

hard

A. Save the specific sheet as .csv and send the CSV file

B. Copy the sheet data and paste into a Word document

C. Save the entire workbook as .xlsx and send it

D. Print the sheet and send a scanned image

Solution

1. Step 1: Identify sharing needs

   The colleague does not use Excel, so sending an Excel file may not help.

2. Step 2: Choose a simple, widely supported format

   CSV files contain raw data and can be opened by many programs, making it ideal for sharing raw data.

3. Step 3: Save only the needed sheet as CSV

   Saving just the required sheet as CSV avoids sending unnecessary data and keeps it simple.

4. Final Answer:

   Save the specific sheet as .csv and send it -> Option A

5. Quick Check:

   Share raw data simply = save sheet as CSV [OK]

Hint: Save needed sheet as CSV to share raw data easily [OK]

Common Mistakes:

• Sending full .xlsx file to non-Excel user
• Using Word which may lose table structure
• Sending scanned images which are not editable