CLAD CLAD File I/O & Data Management 1 — Questions and Answers
Question 1: Which LabVIEW function is used to open or create a file for reading or writing?
- Open/Create/Replace File (Correct answer)
- File Dialog
- Read File
- Path to String
Correct answer: Open/Create/Replace File
The Open/Create/Replace File function opens an existing file, creates a new one, or replaces an existing file depending on the selected option.
Question 2: What data type does LabVIEW use to represent a file path?
- String
- Path (Correct answer)
- Byte Array
- Cluster
Correct answer: Path
LabVIEW uses the Path data type (shown as a green wire) to represent file and directory locations in a platform-independent way.
Question 3: Which file format function allows LabVIEW to write spreadsheet-compatible data directly from a 2D array?
- Write to Binary File
- Write To Spreadsheet File (Correct answer)
- Write to XML
- Save Data
Correct answer: Write To Spreadsheet File
Write To Spreadsheet File converts a 2D numeric array to a tab-delimited text file compatible with spreadsheet applications.
Question 4: What does the 'Read Lines from File' function return by default?
- A single string of all file content
- An array of strings, one per line (Correct answer)
- A byte array
- A cluster of strings
Correct answer: An array of strings, one per line
Read Lines from File reads one or more lines from a file and returns them as an array of strings, each element representing one line.
Question 5: When writing binary data to a file in LabVIEW, which function should you use?
- Write to Text File
- Write To Spreadsheet File
- Write to Binary File (Correct answer)
- Format Into File
Correct answer: Write to Binary File
Write to Binary File writes binary data (byte arrays or typed data) directly to a file without text conversion.
Question 6: What happens when you close a file reference in LabVIEW using the Close File function?
- The file is deleted
- The file reference is released and any buffered data is flushed to disk (Correct answer)
- The file is locked for other applications
- The data is moved to a temporary file
Correct answer: The file reference is released and any buffered data is flushed to disk
Closing a file reference releases the system resource and ensures any buffered data is written to disk, preventing data loss.
CLAD CLAD File I/O & Data Management 1
Which LabVIEW function is used to open or create a file for reading or writing?