? 發問時間: 社會與文化語言 · 1 0 年前

計算機概論題目須解答盡快

1.which of the following value cannot be stored accurately using a floating-point format in which the most signficant bit is the sign bit,next three bits represnt the exponent field in excess notation,and the last four represent the mantissa?

(A).2 1/2 (B).3/16 (C).7 (D).6 1/4

2.which of the following bit-patterns represents the smallest value using the floating-point format in which the most significant bit is the sign bit,the next three bits represent the exponent field in excess notation, and the last four bits represent the mantissa?

(A).01001000 (B).01011000 (C).00101000 (D).01111000

3.which of the following data storage systems provides the most efficient random access to individual data items?

(A).Main memory (B).Magnetic disk (C).Optical CDS and DVDs

4.which of the following storage systems is the best suited for storing and retrieving long strings of data that are processed in their sequential order?

(A).Main memory (B).Magnetic disk (C).Optical CDS and DVDs

5.which of the following mass storage systems does not require physical motion?

(A).Main memory (B).Magnetic disk (C).DVDs (D).Flash dives

6.Assuming that each of the following bit-patterns originally had even parity, which one contains an error?

(A).10110100 (B).11000011 (C).00011000 (D).10001001

7.How many errors per pattern could be corrected when using an error-correcting code in which any two code patterns differ by a Hamming distance of 8 ?

(A).3 (B).4 (C).5 (D).6

8.which of the following is a possible LZW compression of the message " xyz xyz xyz " ?

(A).1234 (B).1234545 (C).232 (D).12

9.How many different symbols can be encoded using Unicode ?

(A).256 (B).4,096 (C).65,536 (D).1,046,476

10.which of the following system is least efficient when encoding numeric values?

(A).Two’s complement notation (B).Excess notation

(C).ASCII (D).Floating-point notation

1 個解答

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  • Ashley
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    1 0 年前
    最佳解答

    1.which of the following value cannot be stored accurately

    using a floating-point format in which the most signficant bit is the sign bit,

    next three bits represnt the exponent field in excess notation,

    and the last four represent the mantissa?

    (B).3/16

    2.which of the following bit-patterns represents the smallest value

    using the floating-point format in which the most significant bit is the sign bit,

    the next three bits represent the exponent field in excess notation,

    and the last four bits represent the mantissa?

    (C).00101000

    3.which of the following data storage systems provides the most efficient random access to individual data items?

    (A).Main memory

    4.which of the following storage systems is the best suited

    for storing and retrieving long strings of data that are processed in their sequential order?

    (C).Optical CDS and DVDs

    5.which of the following mass storage systems does not require physical motion?

    (D).Flash dives

    6.Assuming that each of the following bit-patterns originally had even parity,

    which one contains an error?

    (D).10001001

    7.How many errors per pattern could be corrected when using an error-correcting code

    in which any two code patterns differ by a Hamming distance of 8 ?

    (A).3

    8.which of the following is a possible LZW compression of the message " xyz xyz xyz " ?

    (A).1234

    9.How many different symbols can be encoded using Unicode ?

    (D).1,046,476

    10.which of the following system is least efficient when encoding numeric values?

    (A).Two's complement notation

    參考資料: 個人的學習經驗
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