CS 2204 Self-Quiz Unit 3
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Self-Quiz Unit 3
Started on
Tuesday, 30 April 2024, 5:00 PM
State
Finished
Completed on
Tuesday, 30 April 2024, 5:04 PM
Time taken
3 mins 26 secs
Grade
10.00
out of 10.00 (
100
%)
Question
1
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Question text
In 4B/5B encoding, some symbols are used for signaling rather than data. The following provide an example of these:
Question 1Select one:
a.
START
b.
END
c.
RESET
d.
All of the above
Feedback
Your answer is correct.
The correct answer is: All of the above
Question
2
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Question text
Short Message Service (SMS) first became available on 3G mobile phones.
Question 2Select one:
True
False
Feedback
The correct answer is 'False'.
Question
3
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Question text
What are the frequency bands used by Wi-Fi 802.11n?
Question 3Select one:
a.
5 GHz exclusively
b.
2.4 GHz exclusively
c.
2.4 GHz and 5 GHz
d.
None of the above
Feedback
Your answer is correct.
The correct answer is: 2.4 GHz and 5 GHz
Question
4
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If Wi-Fi error rates or collision rates are high, a sender can send a large packet as multiple fragments, each receiving its own link-layer ACK.
Question 4Select one:
True
False
Feedback
The correct answer is 'True'.
Question
5
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Question text
The preferred Wi-Fi encryption standard is Wired-Equivalent Privacy, or WEP.
Question 5Select one:
True
False
Feedback
The correct answer is 'False'.
Question
6
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Wi-Fi Link-Layer ACKs contain the following information:
Question 6Select one:
a.
A timestamp
b.
A sequence number
c.
The number of bytes which are being acknowledged
d.
None
Feedback
Your answer is correct.
The correct answer is: None
Question
7
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Question text
The use of _________ lets the base station receive CDMA messages from unsynchronized mobile phones.
Question 7Select one:
a.
large antennas
b.
expensive digital filter components
c.
sophisticated software algorithms
d.
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Related Questions
Question 11
Not yet answered
P Flag question
A computer system uses 8 bits to represent floating-point values. The 8 bits are organised as follows:
The first bit is a sign bit (0 for positive, 1 for negative).
The middle 3 bits are the exponent, which uses bias of 3.
The last 4 bits are the significand, which is normalised in the same way as the significand is normalised in IEEE-754
formats.
The format does not reserve any special values.
The following arithmetic operation is performed on this system:
00011000 x 11000110
The result is then stored in the same 8-bit floating-point format.
What is the relative error of the stored result comapred to the value of the result of the arithmetic operation? Answer
s
are rounded to 5 decimal places.
O a. None of the other answers.
O b. 0.03030%
O c. 0.03125%
O d. 0.97865%
O e. 0%
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True/False
In Floating Point Addition, the exponents of the two numbers being added need to be made equal before the mantissa fields can be added, as this ensures that the bit positional values are now aligned
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6-In the representation Complement to 1, we
the number when
Code the absolute value
thus is negative:
A = True
B- False
7- The result
in base 10'
A - 44.25
B-42015
C- 51. 13
45. 75
8- The result
AT 40.
B + 61
q
of the transformation (101001.10) 2
usi
o
the transformation (52) a in bose 10 is:
C² 42
D-41
WWW
30
O
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add x5, x5, x8Every binary digit must be either 0 or 1 or X.
If it appears in multiple bits, then you must input multiple bits, e.g.: 0011xx11Control Signal: Value
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1. In a binary coded decimal (BCD) system, 4 bits are used to represent a
decimal digit from 0 to 9. For example, 3710 is written as 00110111BCD.
(a) Write 28910 in BCD
(b) Convert 100101010001BCD to decimal
(c) Convert 01101001BCD to binary
(d) Explain why BCD might be a useful way to represent numbers
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You are hired to decrypt a message that has the following binary sequence:
0100 0101 0100 1100 0100 0011 0110 1111 0110 0100 0110 1001 0100 0111
0110 1111 0100 0101 0101 0011 0011 0011 0011 0111 0011 0101 0011 0001
0011 0110 0011 0010
The message must be displayed on a 7-segment display, it is only known that the encoding is in ASCII.
1.Approach, encoding of the message and truth table.
2.Functional electronic circuit to display the message.
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24. Refer to Table 6–2. Determine the string of ASCII codes for the following message
including the spaces: CAUTION! High Voltage.
25.
Refer to Table 6-2. Decode the following ASCII coded message:
1001000 1100101 1101100 1101100 1101111 0101110 0100000 1001000 1101111
1110111 0100000 1100001 1110010 1100101 0100000 1111001 1101111 1110101
0111111
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Instructions
Number Representations
Indicate the sign (-) of the number only when negative.
For signed-no. representation, use a minimum number of bits to represent the number (8 or 16)
For 32-bit no. representation, use 0...0 for additional zeroes
DON’T use space for all your answers
Use caret ( ^ ) for exponent
DON’T use comma ( , ) in any case
Given the decimal number below, provide the following:-94.827Conversion to binary _____________
The normal form equivalent ____________
32-bit number representation _____________
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For 10 bits floating point representation using: seeeefffff, what is the bias for denormalized numbers?
A. 7
B. 6
C. 4
D. 3
E. 2
What is the range of integers that can be represented using 8 bits 2's complement?
A. -127 to 127
B. -128 to 127
C. -127 to 128
D. 0 to 255
E. 0 to 256
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10-1010
Express the following bit patterns in hexadecimal notation:
Question 5
10100000101%3D
110001111011=
000010111110
001101010011
To submit your assignment:
Please answer the question on the Lab Document and submit your file throug
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Please note this says grey encoding.
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Round the following binary numbers (rounding position is bolded – it is the bit at the 2-4 position) following the rounding rules of the IEEE floating point representation.
I. 1.00111112
II. 1.10010012
III. 1.01111002
IV. 1.01101002
For each of the four (4) resulting rounded binary numbers, indicate
- what type of rounding you performed and
- compute the value that is either added to or subtracted from the initial binary number (listed above) as a result of the rounding process. In other words, compute the error introduced by the rounding (approximation) process.
please note that the rounding is based on the bolded numbers!!! Not the 2s in the end those are just binary signs
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3. Fractional Values
Complete the following table. The first row is filled in to show the kind of values expect
ed. For simplicity, the bits of the floating point numbers are shown in 3 groups - sign,
exponent and significand. For the 8 bit floating point assume 1 bit for the sign bit, 4 for
the exponent, and 3 bits for the significand. The bias is 7 for this type.
Decimal
Binary Fixed Point
8 bit floating point
0.25
0.01
0 0101 000
0.125
1.101
0 1101 100
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An error correcting code has the following code
words: 00000000, 00001111, 01010101, 10101010,
11110000. What is the maximum number of bit
errors that can be corrected ?
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EV:
V7:
VS:
MY:
E5:
30:
A4D:
AD9:
A34:
R08:
Provide the description of the following error codes, and
explain how you would reconcile them:
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The hamming code for the data " 10101010" will be
Note : the first bit is the right most bit
O a. 0101
on
O b. 0100
O c. 0110
O d. 1100
O e. Non of the choices
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True/False
1. The octal number system is a weighted system with eight digits.2. The binary number system is a weighted system with two digits.3. MSB stands for most significant bit.4. In hexadecimal, 9 + 1 = 10.5. The 1’s complement of the binary number 1010 is 0101.6. The 2’s complement of the binary number 1111 is 0000.7. The right-most bit in a signed binary number is the sign bit.8. The hexadecimal number system has 16 characters, six of which are alphabetic characters.9. BCD stands for binary coded decimal.10. An error in a given code can be detected by verifying the parity bit.11. CRC stands for cyclic redundancy check.12. The modulo-2 sum of 11 and 10 is 100.
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Represent -0.65tenin single and double-precision formats:
Final representation: (-1)Sx (1 + Fraction) x 2(Exponent –Bias)
Single: (1 + 8 + 23)
Double: (1 + 11 + 52
)What decimal number is represented by the single-precision number?
1 1000 0001 11000...0000
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Encode (800) 555-0012 in ASCII, including punctuation.
5.Translate the following hexadecimal into binary and then into ASCII: 68 65 78 61 64 65 63 69 6D 61 6C
You have discovered the following string of binary ASCII code; figure out what they mean: 01010111 01100001 01111001 00100000 01110100 01101111 00100000 01100111 01101111 00100001
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value_a = 179
value_b = 215
sum = value a + value b =
(enter answer in decimal)
value_c = 137
value d = 183
sum = value_c + value_d =|
(enter answer in decimal)
In this exercise, the following two16-bit positive integers are to be
added:
value_a = 46861
value_b
= 51071
If only 16 bits are available to represent the answer, then the result
will be,
sum = value_a + value_b
(enter answer in decimal)
You have designed a number system which uses 19-bit positive
integers
In your system what is the result of,
value a = 393710
value_b = 394509
sum = value_a + value_b
(enter answer in decimal)
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1- If the information bits are
unchanged in their values, the code
can be supposed:
Systematic and Nonsystematic codes in the
same time
O Nonsystematic codes
O systematic codes
O Could not be decide
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Number representation and overflow] Consider the following 8 bit binary number numbers below:
A = 11010111
B = 10011101
a. What is the value of A in decimal if we interpreted A as an unsigned number?
b. What is the value of B in decimal if we interpreted B as a two's complement number?
c. In two's complement representations for both A and B:
i. What is the value of (A + B)? Indicate if there is an overflow?
ii. What is the value of (B - A)? Indicate if there is an overflow?
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What bit string is stored in memory for the following 8 character string when using ASCII representation? (Use 8 bit cells):
822-7003
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2.
Convert the IEEE 754 single precision binary representation to a decimal number
1001 1001 1011 0000 0000 0000 0000 0000
Note: make sure that in final answer the fraction is in base 10 (at most 3 digits). You don't need
to change the power of 2 in a power of 10.
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Using the signed-1's complement format, the representation of -7 is_
1000
0111
1111
1001
This is a standard binary code for the alphanumeric characters that uses seven
bits to code 128 characters
Hollerith Code
ASCII Code
EBCDIC Code
Gray Code
This is defined as a single variable within a term, in complemented or
uncomplemented form.
coefficient of variable
unary variable
literal
constant
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TMin - 1 (write in decimal representation):
-TMin:
-TMax:
TMAX>
A
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inal Exam, Computer Organization 110408240, Sep 1 2021
Consider the following binary number that is represented using a floating-point
format with (1 bit) for the sign, (8 bits) for the biased exponent and (8 bits) for the
magnitude, and answer the following
1 10000110 10101001
1- What is the bias value?
2-What is the exponent value?
AGE
NEXT PAC
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In CRC, bits in divisor are
the CRC
Redundant bits
Select one:
O a. More than
O b. Equal to
c. Less than
O d. None
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Manchester encoding guarantees frequent
clock synchronization by changing signal
values. What is the maximum number of bits
which may be encoded without a signal
change?
(Note: The way this question has been asked.
you are not to include the bit which includes a
signal change in your count)
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Define conversion time.
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1. What is the binary representation of the largest positive integer that can be represented with 19 bits
2. What is the LARGEST base ten number that can be represented with 1 BYTE in Binary
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Select the correct statement(s) regarding the difference between analog and digital signals.
a. analog signals are used more extensively in modern computer systems compared to digital signals
b. digital signals are represented by logical and discrete values (i.e., “0” and “1”) and therefore logical bits must be grouped together to represent symbols
c. digital signals are more accurate than analog signals; this is why digital music sounds much better
d. analog networks easily fit into the OSI Reference Model
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Related Questions
- Question 11 Not yet answered P Flag question A computer system uses 8 bits to represent floating-point values. The 8 bits are organised as follows: The first bit is a sign bit (0 for positive, 1 for negative). The middle 3 bits are the exponent, which uses bias of 3. The last 4 bits are the significand, which is normalised in the same way as the significand is normalised in IEEE-754 formats. The format does not reserve any special values. The following arithmetic operation is performed on this system: 00011000 x 11000110 The result is then stored in the same 8-bit floating-point format. What is the relative error of the stored result comapred to the value of the result of the arithmetic operation? Answer s are rounded to 5 decimal places. O a. None of the other answers. O b. 0.03030% O c. 0.03125% O d. 0.97865% O e. 0%arrow_forwardTrue/False In Floating Point Addition, the exponents of the two numbers being added need to be made equal before the mantissa fields can be added, as this ensures that the bit positional values are now alignedarrow_forward6-In the representation Complement to 1, we the number when Code the absolute value thus is negative: A = True B- False 7- The result in base 10' A - 44.25 B-42015 C- 51. 13 45. 75 8- The result AT 40. B + 61 q of the transformation (101001.10) 2 usi o the transformation (52) a in bose 10 is: C² 42 D-41 WWW 30 Oarrow_forward
- add x5, x5, x8Every binary digit must be either 0 or 1 or X. If it appears in multiple bits, then you must input multiple bits, e.g.: 0011xx11Control Signal: Valuearrow_forward1. In a binary coded decimal (BCD) system, 4 bits are used to represent a decimal digit from 0 to 9. For example, 3710 is written as 00110111BCD. (a) Write 28910 in BCD (b) Convert 100101010001BCD to decimal (c) Convert 01101001BCD to binary (d) Explain why BCD might be a useful way to represent numbersarrow_forwardYou are hired to decrypt a message that has the following binary sequence: 0100 0101 0100 1100 0100 0011 0110 1111 0110 0100 0110 1001 0100 0111 0110 1111 0100 0101 0101 0011 0011 0011 0011 0111 0011 0101 0011 0001 0011 0110 0011 0010 The message must be displayed on a 7-segment display, it is only known that the encoding is in ASCII. 1.Approach, encoding of the message and truth table. 2.Functional electronic circuit to display the message.arrow_forward
- 24. Refer to Table 6–2. Determine the string of ASCII codes for the following message including the spaces: CAUTION! High Voltage. 25. Refer to Table 6-2. Decode the following ASCII coded message: 1001000 1100101 1101100 1101100 1101111 0101110 0100000 1001000 1101111 1110111 0100000 1100001 1110010 1100101 0100000 1111001 1101111 1110101 0111111arrow_forwardInstructions Number Representations Indicate the sign (-) of the number only when negative. For signed-no. representation, use a minimum number of bits to represent the number (8 or 16) For 32-bit no. representation, use 0...0 for additional zeroes DON’T use space for all your answers Use caret ( ^ ) for exponent DON’T use comma ( , ) in any case Given the decimal number below, provide the following:-94.827Conversion to binary _____________ The normal form equivalent ____________ 32-bit number representation _____________arrow_forwardFor 10 bits floating point representation using: seeeefffff, what is the bias for denormalized numbers? A. 7 B. 6 C. 4 D. 3 E. 2 What is the range of integers that can be represented using 8 bits 2's complement? A. -127 to 127 B. -128 to 127 C. -127 to 128 D. 0 to 255 E. 0 to 256arrow_forward
- 10-1010 Express the following bit patterns in hexadecimal notation: Question 5 10100000101%3D 110001111011= 000010111110 001101010011 To submit your assignment: Please answer the question on the Lab Document and submit your file througarrow_forwardPlease note this says grey encoding.arrow_forwardRound the following binary numbers (rounding position is bolded – it is the bit at the 2-4 position) following the rounding rules of the IEEE floating point representation. I. 1.00111112 II. 1.10010012 III. 1.01111002 IV. 1.01101002 For each of the four (4) resulting rounded binary numbers, indicate - what type of rounding you performed and - compute the value that is either added to or subtracted from the initial binary number (listed above) as a result of the rounding process. In other words, compute the error introduced by the rounding (approximation) process. please note that the rounding is based on the bolded numbers!!! Not the 2s in the end those are just binary signsarrow_forward
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