Binary and Hexadecimal Homework

Name __________________________

1. Convert each of the following BINARY representations to HEXADECIMAL representations. The first one is done for you. 0001 1001 = Hex 19 1111 0000 = Hex __ __ 0001 1000 = Hex __ __ 0011 0001 = Hex __ __

2. Convert the following HEXADECIMAL dump to binary. Group the binary digits in groups of 4. 3132 64FE = BINARY ____ ___ ____ ____ ____ ____ ____ ____ ____ ____

3. The HEX value X'69' is a set of program flags in memory. Which bits are ON? Check the ones which are on? (The first bit is bit 1). ____ _____ ____ ____ _____ ____

4. In memory, we have the following big-endian 4 byte integers. Determine their values in decimal. The first two are done for you. 0000 0B2A = ___2858___ (10 + 2*16 + 11*16^2 = 10 32 11*256= 2816 ---- 2858 0001 1024 __69668___ (4 + 2*16 + 0 * 16^2 + 1*16^3 + 1*16^4 = 4 32 4096 65536 ----- 69668 0000 0020 _________________ 0000 000E _________________ 0000 00FF _________________ 0000 1111 _________________ 000F 0051 _____________________________

5. Consider this text file: Line 1111 Line 2222 a B 1

   We dumped this file using a hex dump utility which produced this output:

   0000000: 4c69 6e65 2031 3131 310d 0a4c 696e 6520 Line 1111..Line 0000010: 3232 3232 0d0a 610d 0a42 0d0a 310d 0a 2222..a..B..1..

   What hexadecimal byte(s) are used to demark the end of each line of text? _______________

   Is this end of line sequence used after the last line? ____________

   What is the hex code for ASCII 'L'? _______ for '1'? _______

6. An Intel (little-endian) integer has the value: X'35010200'

   Write this as big-endian (i.e. do the reversals) in hex. ___________________________

   BONUS: What is this integer in decimal? _______________________

7. A little-endian number in memory is X148e. What is this in decimal? Show steps of flipping bytes, then converting.

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