MODD / Mr. Hansen

Name: _____________________________

9/20/2013

 

 

Big Quiz (70 points)

1. Write the contents in hex (using proper prefix or suffix notation, not both) for a text file that has the contents
            MODD is OK

followed by a beep and the end-of-file indicator (Ctrl+Z or decimal value 26).

 

 

 

2. How many megabytes are in a terabyte?

 

 

 

 

3. A DSL modem with a download speed of 5 mbps (5 megabits per second) is used to transfer a 5 GB movie. Estimate the download time required.

 

 

 

 

 

4. The 30-year-old laptop computer in Mr. Hansen’s classroom has a total SSD storage capacity of 32 KB. Approximately how many of those computers would be needed in order to store a typical MP3 file of size 5 MB?

 

 

5. How many cycles per second is 13 GHz?

 

 

 

 

 

6. In a signed dword format, how can you tell that 0xFFFFFEB9 denotes a negative integer? ____________________________ What base-10 integer is represented by 0xFFFFFEB9? Show all work. Be clear, and write neatly! Minor errors will be forgiven.

 

 

 

 

 

 

 

 

 

 

 

 

 

7. For the dword value given in #6, give (in both decimal and hex) the integer that is 1 greater. Answers: Decimal ______________ and hex _______________ .

8. Complete the thought: Computers never actually “subtract” one value Y from another value X; instead, they ___________ the ____________________________________________ of Y to ______________.

9. What format is 0x0000E58B in? __________________________ Convert 0x0000E58B to binary _______________________________________________ and then to base 10, showing all steps for the base 10 conversion.

 

 

 

 

 

 

 

 

 

 

10. Subtract the dword integer 0x718AC32D from 0x0000E58B. Show and explain all steps. After you have computed the final answer in hex, convert the final answer to decimal (base 10), explaining your steps.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11. Fill in each blank with the word or phrase that best fits.

 

The American Standard Code for Information Interchange is pronounced ________________________________________ .

 

A byte equals _______ bits or _________ hex digits.

 

The total number of different possible keys that could be created using 128 bits is ____________________ as a power of 2, or about _________________ as a power of 10.

 

1024 = (2 to what power)? _________