UGC NET CSE | December 2013 | Part 2 | Question: 49

Question

How much space will be required to store the bit map of a 1.3 GB disk with 512 bytes block size?

• A. 332.8 KB
• B. 83.6 KB
• C. 266.2 KB
• D. 256.6 KB

Comments

Write Qus properly .Qus is incomplete?

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@ManojK Now sir? :D :D

And @Kanika this is how you should ask the question. welcome to Gateoverflow. Enjoy. :P

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yes correct rude Sir.

Answer 1

Source of picture: - Operating System by #Abraham Silberschatz, P B Galvin & Greg Gagne (edition 9th), Chapter 12 -File-System Implementation, page number - 562.

 

Answer 2

I am getting  332.8KB

total number of bolck in File is  =  1.3GB/512B

                                                  =  2.6 M block

and each Block Need  1 bit in Bit map then total 2.6 M bit are needed to represent Bit Map in memory

memory for Bit map in Byte  = 2.6 M bit / 8 bit

                                              =  332.8 KB