Week 2

Question 1

In Herman Hollerith’s punch card design, how would the number 7 be represented?

Answer 1

No punches in the first three columns, but one in the 7th row

Question 2

In Herman Hollerith’s punch card design, how would the letter C be represented?

Answer 2

Punch in row 12 and then punch the number 3 row underneath.

Question 3

Explain the relationship between Hollerith’s punch card notation and binary representation.

Answer 3

1 punch implied a 1 and two in the same column implied a 0.

Question 4

Explain the relationship between the binary numbering system and the function provided by the transistor.

Answer 4

Two states can be on of off, light or no light, hole, or no hole, and voltage or no voltage. The two states “0” and “1” can be represented a voltage of 0 volts for zero value, and 5 volts for one value, this is how transistors and switches function.

Question 5

Translate the base-10 value 174 to binary. Express the result as a byte.

Answer 5

10101110

Question 6

Translate the base-10 value 421 to binary. Express the result as two bytes.

Answer 6

110100101

Question 7

Express the character ‘P’ in binary.

Answer 7

0101 0000

Question 8

Explain the relationship between word and byte.

Answer 8

8 bits make a byte and 2 bytes make a word (or 16 bits make a word)

Question 9

Explain the relationship between word and byte.

Answer 9

8 bits make a byte and 2 bytes make a word (or 16 bits make a word) in a 16 bit processor. However the bigger processors like 32 bit (32 words) and 64 bit (64 words) have larger words

Question 10

How many bytes are occupied by data that is said to be 12 words, assuming we are using a 16-bit processor.

Answer 10

24 bytes

Question 11

Explain why 64-bit processors have the potential to perform their tasks more quickly than 32-bit processors

Answer 11

32 bit processors can only process 32 words at a time while a 64 bit processor can access 64 words at a time.

Question 12

Explain why 64-bit processors have the potential to perform their tasks more quickly than 32-bit processors

Answer 12

32 bit processors can only process 32 words at a time while a 64 bit processor can access 64 words at a time, meaning 64 bit can do twice the amount of calculations a 32 bit can at a time.

Question 13

Encrypt the phrase “I LOVE MSIS” using the one-time pad value “HELP”.

Answer 13

PPZKLQDXZ

Question 14

Explain how to decrypt a value that was produced by encrypting some original plain text with the one-time pad value “HELP”.

Answer 14

Using the

Question 15

Explain how to decrypt a value that was produced by encrypting some original plain text with the one-time pad value “HELP”.

Answer 15

The numeric values are determined from there positional values of the alphabet. You find the numerical value of both the text and the one-time pad value and line them up in a way in which the original plaintext without spaces is up top

Question 16

Explain how to decrypt a value that was produced by encrypting some original plain text with the one-time pad value “HELP”.

Answer 16

The numeric values are determined from there positional values of the alphabet. You find the numerical value of both the text and the one-time pad value and line them up in a way in which the original plaintext number are up top and the one-time pad numbers are underneath. Then subtract to find the value you can correspond with the numerical value of the alphabet.