Assume we have a RandomAccessFile object, file, which stores a set of records of class MyData, each needing MyData.RECORD_SIZE bytes for storage.Which expression calculates the number of records in the file?
A)MyData.RECORD_SIZE * file.length()
B)file.length() / MyData.RECORD_SIZE
C)MyData.RECORD_SIZE + file.getFilePointer()
D)file.seek(0L) / MyData.RECORD_SIZE

Question

Quizplus · Accepted Answer

To calculate the number of records in the file, we need to divide the total length of the file by the size of each record. Therefore, the correct expression is file.length() / MyData.RECORD_SIZE.

Assume We Have a RandomAccessFile Object, File, Which Stores a Set