I purchased the
java 2 study guide exams 310-035 & 310-027 by Kathy Sierra and Bert Bates.
We'll I just finished chapter one and went through the pratice exam and scored only 20% overall, which is pretty depressing. Anyway, something aren't making sense to me. Are there mistakes in this book that have corrections else.
One thing is that it's using the forumal for unsigned as 2^(bits -1)- 1 which doesn't seem correct. Because if you take 16 bits, which is 1111111111111111 in binary and if you count doubling each number from 1 to 32768 it comes out to 65535, which the forumal looks like it should be just 2^(bits)-1
and a byte = 8 bits would be 2^8-1 which is 255 which makes sense.
Am I mistaken or the authors made a mistake? If there's corrections or anything for this book can I have the url for it please?
I don't know java well and after scoring 20% on chapter one doesn't seem like I'm doing well. Is this exam for me?
thanks in advance for any help