number 15. operating system. 14. Fill in the blank. (Your answer must be all low

Question

number 15. operating system.

14. Fill in the blank. (Your answer must be all lower-case letters with correct spelling. Do not enter any punctuation mark.) In computer securitv communication employed to illicitly transfer information, thus breaking the security policy of the system l'or example, we use this technique to hide an image within an image. (n: Youranswer consists of 13 characters.) is an impleton of a covert channel, a method of 15, What is the maximum file size that the UNIX triple indirect method can handle if each block is 1K bytes and an address is specified by 4 bytes? A. -64 G Bytes B. 64 M Bytes C. « 256 M Bytes D. o 1024 M Bytes E. ° more than 1024 M Bytes

Explanation / Answer

ANSWER:- Most appropriate answer is option (E) more than 1024 M Bytes

Single indirect block: – Assuming 32bit addresses, we have 4 bytes per block pointer,

so 1 KB/4 = 256 blocks – So … 256 * 1 KB = 256 KB •

Doubleindirect block: – 256 * 256 * 1 KB = 64 MB •

Triple Indirect block: – 256 * 256 * 256 * 1 KB = 16 GB • Total: ~16 GB

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