This week's book giveaways are in the Java EE and JavaScript forums. We're giving away four copies each of The Java EE 7 Tutorial Volume 1 or Volume 2(winners choice) and jQuery UI in Action and have the authors on-line! See this thread and this one for details.

Dear friends.. Please help me out regarding the following questions, and if you can please send me the answers. Thanking you from the heart

(A) Data was stored in the Digital PDP-9 computer using six-digit octal notation. 1. What is the largest positive octal number that can be stored in this machine? 2. What does the number in (1) correspond to in decimal? 3. What is the largest possible negative number? Give your answer in both octal and decimal form.

(B) Find the 16-bit 2's complementary binary representation for the decimal number 1987.

(C) Find the 16-bit 2's complementary binary representation for the decimal number -1987.