DBBXA
DBDBC
第4題題目那個數(shù)字沒看明白,沒見過這樣的表示法.:+2-4*1.01110011那是2的-4次冪 能不能簡單解釋一下這幾道題，謝謝啦第1題：對某個音頻信號每秒采樣8000次，每次采樣后的量化值可表述為256級不同的電平，問這個信號每秒鐘需要多少位表述。256級不同的電平需要8個位才能表示（256等于2的8次方），因此每秒需要8*8000個位。 第2題：假設(shè)某個計算機(jī)有4個寄存器（R0~R3），內(nèi)部存儲器包含1024個字，然后支持16種不同的操作（加、減、等等）。假定一條完整的指令類似于add 565 R2，那么該計算機(jī)的指令系統(tǒng)至少為多少位？從列舉的指令格式可以看出操作、內(nèi)部存儲器地址、寄存器一個都不能少。4個寄存器需要2位，1024個字需要10位，16種操作需要4位，因此總共至少需要16位。 第3題：二進(jìn)制數(shù)00100010對應(yīng)的十進(jìn)制數(shù)。這題太基礎(chǔ)，沒什么好講的。 第4題：如果是2的-4次冪，再乘以1.01110011，那么按照IEEE754標(biāo)準(zhǔn)，則符號位為0，8位階碼為01111011，23位小數(shù)部分為01110011后面全是0。因此選A。 第5題：某計算機(jī)有64MB內(nèi)存。該計算機(jī)的一個字是4字節(jié)，那么對單個字尋址需要多少位？64MB÷4 = 16MB，因此字地址是24位。 第6題：某灰度圖片可量化為4個灰度級別，且該圖片分辨率為100*100，那么該圖片占用多少位？4個灰度級別需要2位，因此2*100*100 = 20000 第7題：假設(shè)內(nèi)存地址空間為8MB，每個字為8位，那么對單個字尋址需要多少位？每個字恰好是一字節(jié)，因此字尋址范圍是8M，需要23位。 第8題：下面哪個表述是正確的？A，表述浮點數(shù)的時候通常用一個位來表述小數(shù)點。這是錯誤的。IEEE格式浮點數(shù)是固定格式解析，不需要用某個位表述小數(shù)點。B，表述極小分?jǐn)?shù)時，容易發(fā)生溢出。這是錯誤的。既然是極小，那么容易發(fā)生下溢或者截取，而不是溢出。C，所有十進(jìn)制數(shù)都可以用二進(jìn)制數(shù)精確表示。這是錯誤的。對于整數(shù)，可行；對于小數(shù)，大部分十進(jìn)制數(shù)是無法用二進(jìn)制數(shù)精確表示的。D，用2的補(bǔ)碼形式表示數(shù)字時，一個加法電路加上一個反相電路便可解決加減法運(yùn)算。這是正確的。 第9題：(x99 AND x33) OR (x00 AND xFF)x99 AND x33 = x11x00 AND xFF = x00x11 OR x00 = x11 第10題：下列哪一個代表最大的（數(shù)據(jù)）容量？常識題，沒啥好解釋的。
求大神來解答下面的問題
求大神來解答下面的問題
1．An audio signalis sampled 8000 times per second. Each sample is represented by 256 differentlevels. How many bits are needed to represent this signal?
A.8000 B. 256*8000 C.7*8000 D. 8*8000
2．An imaginarycomputer has four data registers (R0 to R3), 1024 words in memory, and 16different instructions (add, subtract, etc.). What is the minimum size of an instructionin bits if a typical instruction uses the following format: add 565 R2.
A.12 B. 16 C.15 D. 14
3．Given the binary number 00100010 , which one of the following is thecorresponding decimal number?
A.20 B. 34 C.68 D. 36
4．Show the following number in 32-bit IEEE format:+2-4*1.01110011
A.0,01111011,01110011000000000000000
B.0,01111011,10111001100000000000000
C.1,01111011,01110011000000000000000
D.1,00000100,01110011
5．A computer has 64MB of memory. Each word is 4 bytes. How many bitsare needed to address each single word in memory?
A.24 B. 23 C.13 D. 14
6．A gray scale picture is digitized using four different gray levels.If the picture is composed of 100*100 pixels, how many bits are needed torepresent the picture?
A.30000 B. 80000 C.40000 D. 20000
7．If the memory address space is 8MB and the word size is 8 bits, thenbits are needed to access each word.
A.24 B. 10 C.8 D. 23
8．Which one of the following statements is TRUE?
A.When using floating-point notation, we usually use a bit to store the radixpoint.
B.When representing very small fractions, the problem of overflow may occur.
C.All decimal numbers can be represented exactly using binary notation.
D.When two’s complement notation is used to represent numeric values, a circuitfor addition combined with a circuit for negating a value is sufficient forsolving both addition and subtraction problems.
9．Show the result of the following operation:
(x99 AND x33) OR (x00 AND xFF)
A.x33 B. x11 C.x00 D. xFF
10．In the following, which one represents the largest capacity?
A.1024KB B. 100GB C.1TB D. 1024MB
1．An audio signalis sampled 8000 times per second. Each sample is represented by 256 differentlevels. How many bits are needed to represent this signal?
A.8000 B. 256*8000 C.7*8000 D. 8*8000
2．An imaginarycomputer has four data registers (R0 to R3), 1024 words in memory, and 16different instructions (add, subtract, etc.). What is the minimum size of an instructionin bits if a typical instruction uses the following format: add 565 R2.
A.12 B. 16 C.15 D. 14
3．Given the binary number 00100010 , which one of the following is thecorresponding decimal number?
A.20 B. 34 C.68 D. 36
4．Show the following number in 32-bit IEEE format:+2-4*1.01110011
A.0,01111011,01110011000000000000000
B.0,01111011,10111001100000000000000
C.1,01111011,01110011000000000000000
D.1,00000100,01110011
5．A computer has 64MB of memory. Each word is 4 bytes. How many bitsare needed to address each single word in memory?
A.24 B. 23 C.13 D. 14
6．A gray scale picture is digitized using four different gray levels.If the picture is composed of 100*100 pixels, how many bits are needed torepresent the picture?
A.30000 B. 80000 C.40000 D. 20000
7．If the memory address space is 8MB and the word size is 8 bits, thenbits are needed to access each word.
A.24 B. 10 C.8 D. 23
8．Which one of the following statements is TRUE?
A.When using floating-point notation, we usually use a bit to store the radixpoint.
B.When representing very small fractions, the problem of overflow may occur.
C.All decimal numbers can be represented exactly using binary notation.
D.When two’s complement notation is used to represent numeric values, a circuitfor addition combined with a circuit for negating a value is sufficient forsolving both addition and subtraction problems.
9．Show the result of the following operation:
(x99 AND x33) OR (x00 AND xFF)
A.x33 B. x11 C.x00 D. xFF
10．In the following, which one represents the largest capacity?
A.1024KB B. 100GB C.1TB D. 1024MB
英語人氣：868 ℃時間：2020-07-25 22:57:31
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