求大神来解答下面的问题
求大神来解答下面的问题
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
DBBXA
DBDBC
第4题题目那个数字没看明白,没见过这样的表示法.:+2-4*1.01110011那是2的-4次幂 能不能简单解释一下这几道题,谢谢啦第1题:对某个音频信号每秒采样8000次,每次采样后的量化值可表述为256级不同的电平,问这个信号每秒钟需要多少位表述。256级不同的电平需要8个位才能表示(256等于2的8次方),因此每秒需要8*8000个位。 第2题:假设某个计算机有4个寄存器(R0~R3),内部存储器包含1024个字,然后支持16种不同的操作(加、减、等等)。假定一条完整的指令类似于add 565 R2,那么该计算机的指令系统至少为多少位?从列举的指令格式可以看出操作、内部存储器地址、寄存器一个都不能少。4个寄存器需要2位,1024个字需要10位,16种操作需要4位,因此总共至少需要16位。 第3题:二进制数00100010对应的十进制数。这题太基础,没什么好讲的。 第4题:如果是2的-4次幂,再乘以1.01110011,那么按照IEEE754标准,则符号位为0,8位阶码为01111011,23位小数部分为01110011后面全是0。因此选A。 第5题:某计算机有64MB内存。该计算机的一个字是4字节,那么对单个字寻址需要多少位?64MB÷4 = 16MB,因此字地址是24位。 第6题:某灰度图片可量化为4个灰度级别,且该图片分辨率为100*100,那么该图片占用多少位?4个灰度级别需要2位,因此2*100*100 = 20000 第7题:假设内存地址空间为8MB,每个字为8位,那么对单个字寻址需要多少位?每个字恰好是一字节,因此字寻址范围是8M,需要23位。 第8题:下面哪个表述是正确的?A,表述浮点数的时候通常用一个位来表述小数点。这是错误的。IEEE格式浮点数是固定格式解析,不需要用某个位表述小数点。B,表述极小分数时,容易发生溢出。这是错误的。既然是极小,那么容易发生下溢或者截取,而不是溢出。C,所有十进制数都可以用二进制数精确表示。这是错误的。对于整数,可行;对于小数,大部分十进制数是无法用二进制数精确表示的。D,用2的补码形式表示数字时,一个加法电路加上一个反相电路便可解决加减法运算。这是正确的。 第9题:(x99 AND x33) OR (x00 AND xFF)x99 AND x33 = x11x00 AND xFF = x00x11 OR x00 = x11 第10题:下列哪一个代表最大的(数据)容量?常识题,没啥好解释的。