Question

2. At noon, a computer virus infects 1 byte of a computer's memory. Every minute

Answer 1

Answer:

At 12:18, eighteen minutes after noon, the number of bytes infected be the same in both computers.

Step-by-step explanation:

1. Lets name PC1 the first computer and PC2 the second computer, so, at noon 1 byte of PC1 is infected with the virus, that is:

        PC1

Hour       Bytes infected

12:00                1

Then, every minute thereafter, the number of bytes is multiplied by two, that is:

         PC1

Hour         Bytes infected

12:01                  2

12:02                 4

12:03                 8

12:04                16

12:05                32

12:06                64

12:07                128

12:08               256

12:09               512

12:10                1024

12:11                 2048

12:12                4096

2. In the minute 12 after noon, 1 byte of PC2 is infected, meanwhile PC1 has 4096 bytes infected as shown above, that is:

             PC1                                                            PC2

Hour               Bytes infected                       Bytes infected  

12:12                      4096                                           1

And each minute thereafter, the number of bytes infected in PC2 multiplied by eight, that is:

            PC1                                                            PC2

Hour               Bytes infected                       Bytes infected  

12:13                     8192                                            8

12:14                    16384                                          64

12:15                    32768                                         512

12:16                    65536                                        4096

12:17                    131072                                       32768

12:18                    262144                                     262144

Therefore, at 12:18, eighteen minutes after noon the number of bytes infected be the same in both computers.