46家中外知名企业面试题目
微软
智力题
1.烧一根不均匀的绳子,从头烧到尾总共需要1个小时,问如何用烧绳子的方法来确定
半小时的时间呢?
2.10个海盗抢到了100颗宝石,每一颗都一样大小且价值连城。他们决定这么分:
(1)抽签决定自己的号码(1~10);
(2)首先,由1号提出分配方案,然后大家表决,当且仅当超过半数的人同意时,按照
他的方案进行分配,否则将被扔进大海喂鲨鱼;
(3)如果1号死后,再由2号提出分配方案,然后剩下的4个人进行表决,当且仅当超过
半数的人同意时,按照他的方案进行分配,否则将被扔入大海喂鲨鱼;
(4)依此类推……
条件:每个海盗都是很聪明的人,都能很理智地做出判断,从而做出选择。
问题:第一个海盗提出怎样的分配方案才能使自己的收益最大化?
3.为什么下水道的盖子是圆的?
4.中国有多少辆汽车?
5.你让工人为你工作7天,回报是一根金条,这根金条平分成相连的7段,你必须在每
天结束的时候给他们一段金条。如果只允许你两次把金条弄断,你如何给你的工人付费?
6.有一辆火车以每小时15公里的速度离开北京直奔广州,同时另一辆火车以每小时20
公里的速度从广州开往北京。如果有一只鸟,以30公里每小时的速度和两辆火车同时启动,
从北京出发,碰到另一辆车后就向相反的方向返回去飞,就这样依次在两辆火车之间来回地
飞,直到两辆火相遇,这只鸟一共飞行了多远?
7.你有两个罐子以及50个红色弹球和50个蓝色弹球,随机选出一个罐子,随机选出一
个弹球放入罐子,怎样给出红色弹球最大的选中机会?在你的计划里,得到红球的几率是多
少?
8.想像你站在镜子前,请问,为什么镜子中的影像可以左右颠倒,却不能上下颠倒呢
?
9.如果你有无穷多的水,一个3公升的提捅,一个5公升的提捅,两只提捅形状上下都
不均匀,问你如何才能准确称出4公升的水?
10.你有一桶果冻,其中有黄色、绿色、红色三种,闭上眼睛抓取同种颜色的两个。抓
取多少次就可以确定你肯定有两个同一颜色的果冻?
11.连续整数之和为1000的共有几组?
12.从同一地点出发的相同型号的飞机,可是每架飞机装满油只能绕地球飞半周,飞机
之间可以加油,加完油的飞机必须回到起点。问至少要多少架次,才能满足有一架绕地球一
周。
参考答案:
1.两边一起烧。
2.96,0,1,0,1,0,1,0,1,0。
3.因为口是圆的。
4.很多。
5.分1,2,4。
6.6/7北京到广州的距离。
7.100%。
8.平面镜成像原理(或者是“眼睛是左右长的”)。
9.3先装满,倒在5里,再把3装满,倒进5里。把5里的水倒掉,把3里剩下的水倒进5里
,再把3装满,倒进5里,ok!
10.一次。
11.首先1000为一个解。连续数的平均值设为x,1000必须是x的整数倍。假如连续数的
个数为偶数个,x就不是整数了。x的2倍只能是5,25,
125才行。因为平均值为12.5,要连续80个达不到。125/262.5是可以的。即62,63
,61,64,等等。连续数的个数为奇数时,平均值为整数。1000为平均值的奇数倍。
10002×2×2×5×5×5;x可以为2,4,8,40,200
排除后剩下40和200是可以的。所以答案为平均值为62.5,40,200,1000的4组整数。
12.答案是5架次。一般的解法可以分为如下两个部分:
(1)直线飞行
一架飞机载满油飞行距离为1,n架飞机最远能飞多远?在不是兜圈没有迎头接应的情况
,这问题就是n架飞机能飞多远?存在的极值问题是不要重复飞行,比如两架飞机同时给一
架飞机加油且同时飞回来即可认为是重复,或者换句话说,离出发点越远,在飞的飞机就越
少,这个极值条?
窍匀坏模蛭猲架飞机带的油是一定的,如重复,则浪费的油就越多。比如最后肯定是只
有一架飞机全程飞行,注意“全程”这两个字,也就是不要重复的极值条件。如果是两架飞
机的话,肯定是一架给另一架加满油,并使剩下的油刚好能回去,就说第二架飞机带的油耗
在3倍于从出发?
郊佑偷穆烦躺希腥芊苫谌艽挠秃脑?倍于从出发到其加油的路程上,所以n架飞
机最远能飞行的距离为s1+1/3+…+1/(2n+1)这个级数是发散的,所以理论上只要
飞机足够多最终可以使一架飞机飞到无穷远,当然实际上不可能一架飞机在飞行1/(2n+1)
时间内同时给n
61485;1个飞机加油。
(2)可以迎头接应加油
一架飞机载满油飞行距离为1/2,最少几架飞机能飞行距离1?也是根据不要重复飞行的
极值条件,得出最远处肯定是只有一架飞机飞行,这样得出由1/2处对称两边1/4肯定是一架
飞机飞行,用上面的公式即可知道一边至少需要两架飞机支持,(1/3+1/5)/2>1/4(左边
除以2是一架飞机
飞行距离为1/2),但是有一点点剩余,所以想像为一个滑轮(中间一个飞机是个绳子,两
边两架飞机是个棒)的话5摹K源鸢肝骄滴?2.5,40,200,1000的4组整数。
逻辑推理题
1.此题源于1981年柏林的德国逻辑思考学院,98%的测验者无法解答此题。
有五间房屋排成一列;所有房屋的外表颜色都不一样;所有的屋主来自不同的国家;所
有的屋主都养不同的宠物;喝不同的饮料;抽不同的香烟。
(1)英国人住在红色房屋里;(2)瑞典人养了一只狗;(3)丹麦人喝茶;(4)绿色
的房子在白色的房子的左边;(5)绿色房屋的屋主喝咖啡;(6)吸 Pall
Mall香烟的屋主养鸟;(7)黄色屋主吸Dunhill香烟;(8)位于最中间的屋主喝牛奶;(
9)挪威人住在第一间房屋里;(10)吸Blend香烟的人住在养猫人家的隔壁;(11)养马的
屋主在吸Dunhill香烟的人家的隔壁;(12)吸Blue
Master香烟的屋主喝啤酒;(13)德国人吸Prince香烟;(14)挪威人住在蓝色房子隔壁;
(15)只喝开水的人住在吸Blend香烟的人的隔壁
问:谁养鱼?
提示:首先确定
房子颜色:红、黄、绿、白、蓝 Color 1 2 3 4 5
国籍:英、瑞、丹、挪、德=> Nationality 1 2 3 4 5
饮料:茶、咖、奶、酒、水=> Drink 1 2 3 4 5
烟:PM、DH、BM、PR、混=> Tobacco 1 2 3 4 5
宠物:狗、鸟、马、猫、鱼=> Pet 1 2 3 4 5
然后有:
(9)=>N1=挪威
(14)=>C2=蓝
(4)=>如C3=绿,C4=白,则(8)和(5)矛盾,所以C4=绿,C5=白
剩下红黄只能为C1,C3
(1)=>C3=红,N3=英国,C1=黄
(8)=>D3=牛奶
(5)=>D4=咖啡
(7)=>T1=DH
(11)=>P2=马
那么:
挪威 ? 英国 ? ?
黄 蓝 红 绿 白
? ? 牛奶 咖啡 ?
DH ? ? ? ?
? 马 ? ? ?
(12)=>啤酒只能为D2或D5,BM只能为T2或T5=>D1=矿泉水
(3)=>茶只能为D2或D5,丹麦只能为N2或N5
(15)=>T2=混合烟=>BM=T5,
所以剩下啤酒=D5,茶=T2=>丹麦=D2
然后:
挪威 丹麦 英国 ? ?
黄 蓝 红 绿 白
矿泉水 茶 牛奶 咖啡 啤酒
DH 混合烟 ? ? BM
? 马 ? ? ?
(13)=>德国=N4,PR=T4
所以,瑞典=N5,PM=T3
(2)=>狗=P5
(6)=>鸟=P3
(10)=>猫=P1
得到:
挪威 丹麦 英国 德国 瑞典
黄 蓝 红 绿 白
矿泉水 茶 牛奶 咖啡 啤酒
DH 混合烟 PM PR BM
猫 马 鸟 ? 狗
所以,最后剩下的鱼只能由德国人养了。
2.
. . .
. . .
. . .
请仅用一笔画四根直线,将上图9个点全部连接。
3.对一批编号为1~100全部开关朝上(开)的灯进行以下操作:
凡是1的倍数反方向拨一次开关;2的倍数反方向又拨一次开关;3的倍数反方向又拨一
次开关……
问:最后为关熄状态的灯的编号。
微软招聘总经理助理的三道面试题
1.某手机厂家由于设计失误,有可能造成电池寿命比原来设计的寿命短一半(不是冲
放电时间),解决方案就是更换电池或给50元购买该厂家新手机的折换券。请给所有已购买
的用户写信告诉解决方案。
2.一高层领导在参观某博物馆时,向博物馆馆员小王要了一块明代的城砖作为纪念,
按国家规定,任何人不得将博物馆收藏品变为私有。博物馆馆长需要如何写信给这位领导,
将城砖取回?
3.王小姐由于工作失误,将2万元的笔记本电脑以1.2万元错卖给李先生,王小姐的经
理应该怎么写信给李先生将钱要回?
英文面试题目
1. Algorithms
* What’s the difference between a linked list and an array?
* Implement an algorithm to sort a linked list. Why did you pick the method
you did?
* Implement an algorithm to sort an array. Why did you pick the method you
did?
* Implement strstr() (or some other string library function).
* Reverse a string. Optimize for speed. Optimize for space.
* Count the number of set bits in a number. Now optimize for speed. Now
optimize for size.
* How would you find a cycle in a linked list?
* Give me an algorithm to shuffle a deck of cards, given that the cards are
stored in an array of ints.
* Write a function that takes in a string parameter and checks to see
whether or not it is an integer, and if it is then return the int城砖作为纪念,
按国家规定,任何人不得将博物馆收藏品变为私有。博物馆馆长需要如何写信给这位领导,
将城砖取回?
3.王小姐由于工作失误,将2万元的笔记本电脑以1.2万元错卖给李先生,王小姐的经
理应该怎么写信给李先生将钱要回?
英文面试题目
1. Algorithms
* What’s the difference between a linked list and an array?
* Implement an algorithm to sort a linked list. Why did you pick the method
you did?
* Implement an algorithm to sort an array. Why did you pick the method you
did?
* Implement strstr() (or some other string library function).
* Reverse a string. Optimize for speed. Optimize for space.
* Count the number of set bits in a number. Now optimize for speed. Now
optimize for size.
* How would you find a cycle in a linked list?
* Give me an algorithm to shuffle a deck of cards, given that the cards are
stored in an array of ints.
* Write a function that takes in a string parameter and checks to see
whether or not it is an integer, and if it is then return the integer value.
* Write a function to print all of the permutations of a string.
* Implement malloc.
* Write a function to print the Fibonacci numbers.
* Write a function to copy two strings, A and B. The last few bytes of
string A overlap the first few bytes of string B.
* How would you print out the data in a binary tree, level by level,
starting at the top?
2. Applications
* How can computer technology be integrated in an elevator system for a
hundred story office building? How do you optimize for availability? How would
variation of traffic over a typical work week or floor or time of day affect
this?
* How would you redesign an ATM?
* Suppose we wanted to run a microwave oven from the computer. What kind of
software would you write to do this?
* How would you design a coffee-machine for an automobile.
3. Thinkers
* How are M&Ms made?
* If you had to learn a new computer language, how would you go about doing
it?
* If MS told you we were willing to invest million in a start up of your
choice, what business would you start? Why?
* If you could gather all of the computer manufacturers in the world
together into one room and then tell them one thing that they would be compelled
to do,what would it be?
* Explain a scenario for testing a salt shaker.
* If you are going to receive an award in 5 years, what is it for and who is
the audience?
* How would you explain how to use Microsoft Excel to your grandma?
* Why is it that when you turn on the hot water in any hotel, for example,
the hot water comes pouring out almost instantaneously?
微软亚洲技术支持中心面试题目
1.进程和线程的差别。
2.Heap与stack的差别。
3.Windows下的内存是如何管理的?
4.介绍.Net和.Net的安全性。
5.客户端如何访问.Net组件实现Web Service?
6.C/C++编译器中虚表是如何完成的?
7.谈谈COM的线程模型。然后讨论进程内/外组件的差别。
8.谈谈IA32下的分页机制。
9.给两个变量,如何找出一个带环单链表中是什么地方出现环的?
10.在IA32中一共有多少种办法从用户态跳到内核态?
11.如果只想让程序有一个实例运行,不能运行两个。像winamp一样,只能开一个窗口
,怎样实现?
12.如何截取键盘的响应,让所有的‘a’变成‘b’?
13.Apartment在COM中有什么用?为什么要引入?
14.存储过程是什么?有什么用?有什么优点?
15.Template有什么特点?什么时候用?
16.谈谈Windows DNA结构的特点和优点。
微软研究院笔试题目
1.#include
#include
class CBuffer
{
char * m_pBuffer;
int m_size;
publc:
CBuffer()
{
m_pBuffer=NULL;
}
~CBuffer()
{
Free();
}
void Allocte(int size)
{
m_size=size;
cBuffer buffer1;
buffer1.SaveString(“Microsoft”);
printf(buffer1.GetBuffer());
}
}
找出Allocate, SaveString, main的错误。
2.打印“Welcome MSR Asia”
#include
#include
char * GetName (void)
{
//To return “MSR Asia” String
char name[]=“MSR Asia”;
return name;
}
void main(int argc, char* argv[])
{
char name[32];
//Fill in zeros into name
for(int i=0;i<=32;i++)
{
name[1]=‘{post.content}‘;
}
//copy “Welcome” to name
name=“Welcome”;
//Append a blank char
name[8]=”;
//Append string to name
strcat(name,GetName());
//print out
printf(name);
}
找出程序中的错误。
3.#include
class A
{
public:
void FuncA()
{
printf(“FuncA called/n”);
}
virtual void FuncB()
{
printf(“FuncB called/n”);
}
};
class B: public A
{
public:
void FuncA()
{
A::FuncA();
printf(“FuncAB called/n”);
}
virtual void FuncB()
{
printf(“FuncBB called/n”);
}
};
void main(void)
{
B b;
A *pa;
pa=&b;
A *pa2=new A;
b.FuncA();
b.FuncB();
pa->FuncA();
pa->FuncB();
pa2->FuncA();
pa2->FuncB();
delete pa2;
}
What is the output of the above program?
4.#include
#include
int FindSubString(char* pch)
{
int count=0;
char* p1=pch;
while(*p1!=‘{post.content}’)
{
if(*p1==p1[1]-1)
{
p1++;
count++;
}
else
{
break;
}
}
int count2=count;
while(*p1!=‘{post.content}’)
{
if(*p1!==p1[1]+1)
{
p1++;
count2--;
}
else
{
break;
}
if(count2==0)
return count;
return 0;
}
void ModifyString(char* pText)
{
char* p1=pText;
char* p2=p1;
while(*p1!=‘{post.content}’)
{
int count=FindSubString(p1);
if(count>0)
{
*p2++=*p1;
sprintf(p2, “%I”, count);
while(*p2!= ‘{post.content}’)
{
p2++;
}
p1+=count+count+1;
}
else
{
*p2++=*p1++;
}
}
}
void main(void)
{
char text[32]=“XYBCDCBABABA”;
ModifyString(text);
printf(text);
}
In the main() function, after ModifyString(text) is called, what’s the
value of ‘text’?
微创笔试题目(微创,微软在中国的合资公司)
1.上海的苏州河由于遭受多年的工业污染,一直是条臭水沟。上海市政府下了很大决
心清理苏州河,你觉得需要几年能让河水变清?你的依据是什么?
2.找出字符串A中包含的字符可以进行的所有不同组合。例如:abccd中,ab,ac,bc
,cc,abd等都是可能的组合。(请用C/C++编程,不允许上机操作)
3.请估算月球的体积。
4.经常去的技术网站,请举例。
5.对软件开发过程的理解。
6.上海有多少外籍和港澳台人士?你的依据是什么?(不得引用政府和调研机构数据
)
7.字符串A是由n个小写英文字母(a ~ z)构成的,定义为char A[n]。你能用更少的
空间表示这个字符串吗?请写出从char A[n]到你的新的储存格式的转换函数。(请用
C/C++编程,不允许上机操作)
8.哈希表和数组的定义,区别,优缺点。
9.用递归实现菲波列数列。
10.用dhtml写页面。
11.一楼到十楼的每层电梯门口都放着一颗钻石,钻石大小不一。你乘坐电梯从一楼到
十楼,每层楼电梯门都会打开一次,只能拿一次钻石,问怎样才能拿到最大的一颗?
12.U2合唱团在17分钟内得赶到演唱会场,途中必需跨过一座桥,四个人从桥的同一端出发
,你得帮助他们到达另一端,天色很暗,而他们只有一只手电筒。一次同时最多可以有两人
一起过桥,而过桥的时候必须持有手电筒,所以就得有人把手电筒带来带去,来回桥两端。
ono需花1分钟过桥,Edge需花2分钟过桥,Adam需花5分钟过桥,Larry需花10分钟过桥。他们要如 何在17分钟内过桥呢?(有个同济的学生写文章说他当时在微软面试时就是碰到了这道题,
最短只能做出在19分钟内过桥,微软的人对他讲这样的结果已经是不错的了!)
13.烧一根不均匀的绳要用一个小时,如何用它来判断半个小时?(参考答案:两边一
起烧)
14.为什么下水道的盖子是圆的?(从复旦大学一位计算机系教授那里听来的答案:因
为如果是方的、长方的或椭圆的,那无聊之徒拎起来它就可以直接扔进地下道啦!但圆形的
盖子嘛,就可以避免这种情况了)
15.有7克、2克砝码各一个,天平一只,如何只用这些物品三次将140克的盐分成50、
90克各一份?
Intel笔试面试题目
智力题
1.每天中午从法国塞纳河畔的勒阿佛有一艘轮船驶往美国纽约,在同一时刻纽约也有
一艘轮船驶往勒阿佛。已知横渡一次的时间是7天7夜,轮船匀速航行,在同一航线,轮船近
距离可见。
请问今天中午从勒阿佛开出的船会遇到几艘从纽约来的船?
2.巴拿赫病故于1945年8月31日。他的出生年份恰好是他在世时某年年龄的平方,问:
他是哪年出生的?
答案:
设他在世时某年年龄为x,则x的平方<1945,且x为自然数。其出生年份x的平方
xx (x1),他在世年龄1945x(x1)。1945的
平方根& #61501;44.1,则x应为44或略小于此的数。而x44时,x(x1)&
#61501;44×431892,算得其在世年龄为1945189253;又
x43时,x(x1)43×421806,得其在世年龄为
19451806139;若x再取小,其在世年龄越大,显然不妥。故x&
#61501;44,即他出生于1892年,终年53岁。
3.
(图形描述:一个各边相等的十字图案)
上图中各边相等,要求:用最少的分割,拼成一个正方形。
笔试题目
1.设计一个重采样系统,说明如何anti-alias。
2.y1(n)x(2n),y2(n)x(n/2),问:
如果y1为周期函数,那么x是否为周期函数?
如果x为周期函数,那么y1是否为周期函数?
如果y2为周期函数,那么x是否为周期函数?
如果x为周期函数,那么y2是否为周期函数?
3.如果模拟信号的带宽为5kHz,要用8k的采样率,怎么办。
4.某个程序在一个嵌入式系统(200M的CPU,50M的SDRAM)中已经最优化了,换到另一
个系统(300M的CPU,50M的SDRAM)中运行,还需要优化吗?
5.x^4+a*x^3+x^2+c*x+d最少需要做几次乘法。
6.三个float:a,b,c
问值:
(a+b)+c(b+a)+c
(a+b)+c(a+c)+b此的数。而x44时,x(x1)&
#61501;44×431892,算得其在世年龄为1945189253;又
x43时,x(x1)43×421806,得其在世年龄为
19451806139;若x再取小,其在世年龄越大,显然不妥。故x&
#61501;44,即他出生于1892年,终年53岁。
3.
(图形描述:一个各边相等的十字图案)
上图中各边相等,要求:用最少的分割,拼成一个正方形。
笔试题目
1.设计一个重采样系统,说明如何anti-alias。
2.y1(n)x(2n),y2(n)x(n/2),问:
如果y1为周期函数,那么x是否为周期函数?
如果x为周期函数,那么y1是否为周期函数?
如果y2为周期函数,那么x是否为周期函数?
如果x为周期函数,那么y2是否为周期函数?
3.如果模拟信号的带宽为5kHz,要用8k的采样率,怎么办。
4.某个程序在一个嵌入式系统(200M的CPU,50M的SDRAM)中已经最优化了,换到另一
个系统(300M的CPU,50M的SDRAM)中运行,还需要优化吗?
5.x^4+a*x^3+x^2+c*x+d最少需要做几次乘法。
6.三个float:a,b,c
问值:
(a+b)+c(b+a)+c
(a+b)+c(a+c)+b
7.把一个链表反向填空。
8.下面哪种排序法对12354最快? 。
A. quick sort
B. buble sort
C. merge sort
9.哪种结构平均来讲获取一个值最快? 。
A. binary tree
B. hash table
C. stack
10.
#include “stdafx.h”
#include
struct bit
{ int a:3;
int b:2;
int c:3;
};
int main(int argc, char* argv[])
{ bit s;
char *c = (char*)&s;
*c = 0x99;
cout << s.a < return 0;
}
Output:?
return pd;
}
main()
{
char string[40]= “Hello World!”;
char *pstr=string;
printf(“%s”, pstr);
printf(“%s”, reverse(pstr));
}
实验室笔试题
1.写出下列信号的奈亏斯特频率
(1)f(t)1cos(2000pait)sin(4000pait)
(2)f(t)sin(4000pait)/pait
(3)f(t)(sin(4000pait)的平方)/pait
2.有两个线程
void producer()
{
while(1)
(1)I1
(2)T14*I
(3)T2address(A)4
(4)T3T2[T1]
(5)T4address(B)4
(6)T54*I
(7)T6T4[T5]
(8)T7T3*T5
(9)sumsum+T6
(10)II+1
(11)IF I<20 GOTO (2)
面试题目
1.下面这段代码不符合Pipeline要求,请你改动一下
if(a>b)
i0;
else
i1;
2.对于运行在ring3上的这个指令,请你指出CPU和操作系统分别参与了哪部分操作?
mov eax, [0x12345678]
3.如果有一个芯片,只是裸机,如何写它的操作系统?最难的部分在哪儿?如何解决
?
4.如何写一个主板的BIOS?
5.没有操作系统来给你完成它的一些初始化工作,如何写出PCI的driver?
Intel 2004北京笔试题
问答题
1.你觉得C程序中为什么会有main(),有没有想过exit,return,或什么都不做也可以
让程序正常终止?
2.TOTAL个人围一圈,从1开始数到N,谁数到N出圈,下一个人继续从1开始数,返回最
后一个出局的人。
#define TOTAL 15;
int xxxx(int N)
{
int ring[TOTAL] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1} //全是1
int nextstart = 0, counter=0;
for (i =1; i counter = 0;
while(counter if (_______________)
( ;)
else
(____________;)
}
ring[nextstart]=0
}
return nextstart +1;
}
3.列举Intel四种架构
4.概率题
(1)x, y为随机变量,联合概率密度f(x,y) intig(0,1)*
dx*intig(0,x)*k*dy,k为常数,求k? E(xy) ?
注:intig(a,b)为a到b的定积分。
(2)A,B为随机事件,以下哪个正确 。
A.P(A U B)*p(AB) < P(A)P(B)
B.P(A U B)*p(AB) > P(A)P(B)
C.P(A U B)*p(AB) < P(A) + P(B)
D.P(A U B)*p(AB) > P(A) + P(B)
5.信道带宽200kHz,信噪比10dB,求信道波特率?
6.以下代码运行结果是 。
int main()
{
int a,b,c,abc = 0;
a=b=c=40;
if(c)
{
int abc;
abc = a*b+c;
}
printf(“%d,%d”, abc, c);
return 0;
}
7.给出了从纽约出发和到达洛杉机的各种航班信息,写出找到一条从纽约到洛杉机的
最短距离的航班组合的代码。
8.从计算机图形上截取某个物体边缘的若干个坐标,求这个物体的面积,并判断是方
形还是圆形,说明原因。
9.离散卷机与DFT的区别与关系。快速求出不满足2^N长度的离散傅立叶变换的方法有
哪些?如何用fft求N*M点的离散卷机?
10.给出fir和iir的优缺点。
11.如何计算线性标量量化器的量化噪声?需要哪些假设?
IBM
IBM笔试题目
字母矩阵题目(15分钟)
给你一个矩阵:
(一) (二) (三) (四) (五)
1 a b c d e
2 b c a e d
3 c b e a d
4 c e d b a
5 e d a c b
回答以下问题。
(1)将第一行和第四行交换后,第一行第四个字母下面的左边的下面的右边的字母是
。
①a ②b ③c ④d ⑤e
(2)将所有出现在d左边的字母从矩阵中删掉。将所有出现在a左边的c字母从矩阵中删
掉。如果矩阵中剩下的字母的种类的数目大于3,答案为原矩阵中左上方至右下方对角线上
出现两次的字母。如果矩阵中剩下的字母的种类的数目小于或者等于3,答案为原矩阵中右
上至左下对角线上
出现4次的字母是 。
①a ②b ③c ④d ⑤e
(3)将所有的a用4替换,所有的d用2替换,哪一列的总和 最大
①第1列 ②第2列 ③第3列 ④第4列 ⑤第五列
(4)从左上角的字母开始,顺时针沿矩阵外围,第4次出现的字母是 。
①a ②b ③c ④d ⑤e
(5)沿第5列从上到下,接着沿第3列从下到上,接着沿第4列从上到下,接着沿第1列
从下到上,接着沿第2列从上到下,第1个出现5次的字母是 。
①a ②b ③c ④d ⑤e
(6)从左上角的字母开始,顺时针沿矩阵外围,第4次出现的字母是以下哪个 。
①a ②b ③c ④d ⑤e
智力题
1.有50家人家,每家一条狗。有一天警察通知,50条狗当中有病狗,行为和正常狗不
一样。每人只能通过观察别人家的狗来判断自己家的狗是否生病,而不能看自己家的狗,如
果判断出自己家的狗病了,就必须当天一枪打死自己家的狗。结果,第一天没有枪声,第二
天没有枪声,第?
炜家徽笄瓜欤剩阂还菜懒思柑豕罚?
2.已知两个数字为1~30之间的数字,甲知道两数之和,乙知道两数之积,甲问乙:“
你知道是哪两个数吗?”乙说:“不知道”。乙问甲:“你知道是哪两个数吗?”甲说:“
也不知道”。于是,乙说:“那我知道了”,随后甲也说:“那我也知道了”,这两个数是
什么?
3.一个经理有三个女儿,三个女儿的年龄加起来等于13,三个女儿的年龄乘起来等于
经理自己的年龄。有一个下属已知道经理的年龄,但仍不能确定经理的三个女儿的年龄,这
时经理说只有一个女儿的头发是黑的,然后这个下属就知道了经理的三个女儿的年龄。请问
三个女儿的年龄?
社会招聘笔试题
1.一个粗细均匀的长直管子,两端开口,里面有4个白球和4个黑球,球的直径、两端
开口的直径等于管子的内径,现在白球和黑球的排列是wwwwbbbb,要求不取出任何一个球,
使得排列变为bbwwwwbb。
2.一只蜗牛从井底爬到井口,每天白天蜗牛要睡觉,晚上才出来活动,一个晚上蜗牛
可以向上爬3尺,但是白天睡觉的时候会往下滑2尺,井深10尺,问蜗牛几天可以爬出来?
3.在一个平面上画1999条直线最多能将这一平面划分成多少个部分?
4.在太平洋的一个小岛上生活着土人,他们不愿意被外人打扰,一天,一个探险家到
了岛上,被土人抓住,土人的祭司告诉他,你临死前还可以有一个机会留下一句话,如果这
句话是真的,你将被烧死,是假的,你将被五马分尸,可怜的探险家如何才能活下来?
5.怎样种四棵树使得任意两棵树的距离相等。
6.27个小运动员在参加完比赛后,口渴难耐,去小店买饮料,饮料店搞促销,凭三个
空瓶可以再换一瓶,他们最少买多少瓶饮料才能保证一人一瓶?
7.有一座山,山上有座庙,只有一条路可以从山上的庙到山脚,每周一早上8点,有一
个聪明的小和尚去山下化缘,周二早上8点从山脚回山上的庙里,小和尚的上下山的速度是
任意的,在每个往返中,他总是能在周一和周二的同一钟点到达山路上的同一点。例如,有
一次他发现星期?
坏?点30和星期二的8点30他都到了山路靠山脚的3/4的地方,问这是为什么?
8.有两根不均匀分布的香,每根香烧完的时间是一个小时,你能用什么方法来确定一
段15分钟的时间?
英文面试题目
1. Describe your greatest achievement in the past 4-5 years?
2. What are your short & long term career objectives? What do you think is
the most ideal job for you?
3. Why do you want to join IBM? What do you think you can contribute to IBM?
宝洁公司(P&G)面试题目
宝洁公司招聘题号称由高级人力资源专家设计,无论您如实或编造回答,都能反应您某
一方面的能力。核心部分的题目如下:
Please provide concise examples that will help us better understand your
capabilities.
1. Describe an instance where you set your sights on a high/demanding goal
and saw it through completion.
2. Summarize a situation where you took the initiative to get others going
on an important task or issue, and played a leading role to achieve the results
you wanted.
3. Describe a situation where you had to seek out relevant information,
define key issues, and decide on which steps to take to get the desired results.
4. Describe an instance where you made effective use of facts to secure the
agreement of others.
5. Give an examples of how you worked effectively with people to accomplish
an important result.
6. Describe a creative/innovative idea that you produced which led to a
significant contribution to the success of an activity or project.
7. Provide an example of how you assessed a situation and achieved good
results by focusing on the most important priorities.
8. Provide and example of how you acquired technical skills and converted
them to practical application
解答范例:
1. Demnding Goal: To design a musical and dramatic show to celebrate the
centennial Anniversary of Tianjin University.
The person who reach this goal: Chairman of Tianjin University Student Union
What I learned from this observation: It is not necessary for a true leader to
be an expert in such or such field of his career. But he must possessthe
charismatic and the capacity to drive different people, who have diverging
opinions, or even conflicting interests, to proceed togother to the
sameorganizational goal.
2. The activity I initiated: To organize a group to sing English anthems on
Charistmas Eve, visit all domitories in university and send christmas gifts on
behalf of our English Association The desired result: To broaden the students’
horizons about Western culture.
My leading role: Combine the representatitives’ suggestions with my idea
and draw the decision on:
* What songs to play?
* Who could attend the choir?
* Which spots we performed on?
The result: Many students said that they felt the warmness we sent to them
and they hoped we would hold such activities next Charistmas.
3. Background: I organized the first activity after the establishment of the
Management School English Association.
The desired result: To help the freshmen and the sophomores with their
English while publicizing our group.
Key issue:
* What aspect of the students’ English abilitinjin University Student Union
What I learned from this observation: It is not necessary for a true leader to
be an expert in such or such field of his career. But he must possessthe
charismatic and the capacity to drive different people, who have diverging
opinions, or even conflicting interests, to proceed togother to the
sameorganizational goal.
2. The activity I initiated: To organize a group to sing English anthems on
Charistmas Eve, visit all domitories in university and send christmas gifts on
behalf of our English Association The desired result: To broaden the students’
horizons about Western culture.
My leading role: Combine the representatitives’ suggestions with my idea
and draw the decision on:
* What songs to play?
* Who could attend the choir?
* Which spots we performed on?
The result: Many students said that they felt the warmness we sent to them
and they hoped we would hold such activities next Charistmas.
3. Background: I organized the first activity after the establishment of the
Management School English Association.
The desired result: To help the freshmen and the sophomores with their
English while publicizing our group.
Key issue:
* What aspect of the students’ English abilities needed refining? Relevant
Information:
* What kind of entertainment was popular among students and also offered
chances for them to learn English most effectively?
* Which foreign teacher was suitable for this position?
* When was our member free?
* Whch place was convenient for most attendances?
Rehearsal: I worked together with those who were in charge of the lights,
sounds and scenes to create the perfect artistic effect.
On stage: I reminded my fellows with gestures and eye expressions. Also, we
coped with an emergency coherently.
The result: Our military team won the second prize in this competition.
6. Activity: To hold the Perspective Entrepreneur Contest.
The innovative idea I produced: To simulat a board meeting of a company, in
which our candidates debated the feasibility of selling modern fitness equipment
according to the market information they collected.
The result: The contest was hold based on my proposal.
7. Background: On one morning when our promotion month first began, I found
that the inventories in some department stores were not adequate.
My assessment of the situation: The four promoting stomores with their
English while publicizing our group.
Key issue:
* What aspect of the students’ English abilities needed refining? Relevant
Information:
* What kind of entertainment was popular among students and also offered
chances for them to learn English most effectively?
* Which foreign teacher was suitable for this position?
* When was our member free?
* Whch place was convenient for most attendances?
objective and effective information.
飞利浦笔试试题
1.用逻辑门和cmos电路实现ab+cd。
2.用一个二选一mux和一个inv实现异或。
3.给了reg的setup和hold时间,求中间组合逻辑的delay范围。
4.如何解决亚稳态。
5.用Verilog/VHDL写一个fifo控制器。
6.用Verilog/VDDL检测stream中的特定字符串。
阿尔卡特(中国)的面试题目
全部用C语言完成:
1.自己定义数据结构,写出程序:在一个单向链表中,往I位置插入一个节点。
2.自己定义数据结构,写出程序:二叉树的前序遍历。
3.不允许使用系统时间,写出一个随机数生成函数。
Google
这次是连环游戏,每一题的答案将在下一题中用到。
1、{first 10-digit prime found in consecutive digits e}.com.
e中出现的连续的第一个10个数字组成的质数。
2、7427466391.com
Congratulations,Youve made it to level 2. Go to www.Linux.org and enter
Bobsyouruncle as the login and the answer to this equation as the password.
f(1)=7182818284
f(2)=8182845904
f(3)=8747135266
f(4)=7427466391
f(5)=__________
update:提示:f(1)到f(4)是e中连续的10个数字满足总和等于49的前4个,f(5)当然是
让你搜索第5个咯,编个小程序吧。
答案:5966290435
3、www.Linux.org
4、www.google.com/labjobs/
via:
Google recruits eggheads with mystery billboard
Mysterious Billboard May Be Google Recruitment Ad
Myserious billboard
Google is behind mystery geek trap
写一句俳句来描述搜索流量季节性预测的可能方法。
用三种颜色为一个二十面体涂颜色,每面都要覆盖,你能够用多少种不同的涂法?你将
选择哪三种颜色?
这是一个我们故意留给你你空白,请填充一些你喜欢的东西。
戴尔
I.Choose one question and write down the trouble shooting steps in English (
4-5 steps )
1.Customer report his computer cannot start after sudden power lost. How
will you trouble shoot and find out the cause of the failure.
2.One computer was used normally last day, but today, the user cannot
connect to internet via dial-up networking.
3.Customer complain the system send out great noise. What’s the detail
action to identify the faulty part?
4.My computer was suddenly disconnected from LAN, how to trouble shoot?
5.My computer was hung up. After reboot, only one cursor blinked on the
upper-left corner. How to fix this problem.
II. Reading and translation:
Passage 1.
Customer called in and reported the battery weren’t charging, System
LED indicator was in yellow.
1.Suggested customer remove the battery from the battery bay by sliding
the latch at the bottom of Notebook. Checked the battery power level by pressing
the check button on the battery. It indicated no power.
Different kinds of computers use different methods, or protocols, to
communicate with each other. Macintosh computers use the AppleTalk protocol.
Macintosh as well as PCs can use TCP/IP to share information on the Internet.
Some PCs
require a Network Operatomer provide the DSN number from the fail battery.
CN-05H980-69502-21U-01GB.
Informed customer that we would send a replaced battery to her.
Passage 2.
Customer bought a Notebook 20 day ago, then discovered that when she
adjusted the Brightness of the LCD, the LCD would turn to very dim. She must
reboot the Notebook few times before the LCD might display normally.
1.Suggested her try gently apply pressure above the keyboard near the
LEDS and power button.
2.Suggested her swivel the LCD back and forth and lightly tap the
plastic back of LCD.
3.Suggested her gently apply pressure on the bezel surrounding the
screen. the problem persisted, after these testing.
4.Requested customer to update BIOS and alter the LCD Brightness control
setting in the BIOS. After checking BIOS the problem persisted.
I told customer we would have engineer onsite replace the LCD Panel.
Computer communications
Different kinds of computers use different methods, or protocols, to
communicate with each other. Macintosh computers use the AppleTalk protocol.
Macintosh as well as PCs can use TCP/IP to share information on the Internet.
Some PCs
require a Network Operating System (NOS) to communicate. For example, Novell
Netware is a popular NOS with PC users.
意法半导体软件试题
A Test for The C Programming Language
I. History
1. C was originally designed for and implemented on the (what) operating
system on the DEC PDP-11, by (who) .
2. The most recently approved ANSI/ISO C standard was issued in (when) , and
single line comments notation “//” is or isn’t a feature of C89.
II. Syntax and Semantics
1. In a runtime C program, auto variables are stored in , static variables
are stored in , and function parameters are stored in .
a. stack b. heap c. neither stack nor heap
2. The statement “extern int x;” is a , and the keyword extern is used
during .
a. variable declaration b. variable definition
c. compilation time d. runtime
3. There is a complicated declaration: void ( * signal (int, void (*)(int))
) (int);
If a statement “typedef void (*p) (int);” is given, please rewrite this
complicated declaration.
4. The following code is a segment of C program.
..........
void func(int *p)
{...........}
..........
main()
{
int num=0;
.........
func(&num);
........
}
..........
Here, the function argument “&num” is passed .
a. by value b. by reference
III. Practice
Create a tree, which has h (h>0) layers, and its each node has w (w>0)
sub-nodes.
Please complete the following incomplete solution.
#include
#include
struct tree{
char info;
p_sub; //link to sub-nodes
};
// allocate memory and initiate
void dnode ( struct tree* tmp )
{
= malloc( sizeof (struct tree) );
= 0x41;
= NULL;
}
struct tree *dtree (struct tree* subtree, int height, int width)
{
int i;
if ( !subtree ) //if necessary, allocte memory for subtree
denode(subtree);
if ( height == 1 )
return subtree;
else if ( height == 2 ) {
struct tree *root = NULL;
root = dtree (root, h, w) ; // h and w are integers get from input
.........
}
Sony笔试题
1.完成下列程序
*
*.*.
*..*..*..
*...*...*...*...
*....*....*....*....*....
*.....*.....*.....*.....*.....*.....
*......*......*......*......*......*......*......
*.......*.......*.......*.......*.......*.......*.......*.......
#include
#define N 8
int main()
{
int i;
int j;
int k;
---------------------------------------------------------
| |
| |
| |
---------------------------------------------------------
return 0;
}
2.完成程序,实现对数组的降序排序
#include
void sort( );
int main()
{
int array[]={45,56,76,234,1,34,23,2,3}; //数字任//意给出
sort( );
return 0;
}
void sort( )
{
}
3.费波那其数列,1,1,2,3,5……编写程序求第十项。可以用递归,也可以用其他
方法,但要说明你选择的理由。
#include
int Pheponatch(int);
int main()
{
printf("The 10th is %d",Pheponatch(10));
return 0;
}
int Pheponatch(int N)
{
--------------------------------
| |
| |
--------------------------------
}
4.下列程序运行时会崩溃,请找出错误并改正,并且说明原因。
#include
#include
typedef struct{
TNode* left;
TNode* right;
int value;
} TNode;
TNode* root=NULL;
void append(int N);
int main()
{
append(63);
append(45);
append(32);
append(77);
append(96);
append(21);
append(17); // Again, 数字任意给出
}
void append(int N)
{
TNode* NewNode=(TNode *)malloc(sizeof(TNode));
NewNode->value=N;
if(root==NULL)
{
root=NewNode;
return;
}
else
{
TNode* temp;
temp=root;
while((N>=temp.value && temp.left!=NULL) || (Nright!=NULL
))
{
while(N>=temp.value && temp.left!=NULL)
temp=temp.left;
while(N temp=temp.right;
}
if(N>=temp.value)
temp.left=NewNode;
else
temp.right=NewNode;
return;
}
}
华为笔试题
1.请你分别画出OSI的七层网络结构图和TCP/IP的五层结构图。
2.请你详细地解释一下IP协议的定义,在哪个层上面?主要有什么作用?TCP与UDP呢
?
3.请问交换机和路由器各自的实现原理是什么?分别在哪个层次上面实现的?
4.请问C++的类和C里面的struct有什么区别?
5.请讲一讲析构函数和虚函数的用法和作用。
6.全局变量和局部变量有什么区别?是怎么实现的?操作系统和编译器是怎么知道的
?
7.8086是多少位的系统?在数据总线上是怎么实现的?
联想笔试题
1.设计函数 int atoi(char *s)。
2.int i=(j=4,k=8,l=16,m=32); printf(“%d”, i); 输出是多少?
3.解释局部变量、全局变量和静态变量的含义。
4.解释堆和栈的区别。
5.论述含参数的宏与函数的优缺点。
普天C++笔试题
1.实现双向链表删除一个节点P,在节点P后插入一个节点,写出这两个函数。
2.写一个函数,将其中的/t都转换成4个空格。
3.Windows程序的入口是哪里?写出Windows消息机制的流程。
4.如何定义和实现一个类的成员函数为回调函数?
5.C++里面是不是所有的动作都是main()引起的?如果不是,请举例。
6.C++里面如何声明const void f(void)函数为C程序中的库函数?
7.下列哪两个是等同的
int b;
A const int* a = &b;
B const* int a = &b;
C const int* const a = &b;
D int const* const a = &b;
8.内联函数在编译时是否做参数类型检查?
void g(base & b){
b.play;
}
void main(){
son s;
g(s);
return;
}
大唐电信
DTT笔试题
考试时间一小时,第一部分是填空和选择:
1.数列6,10,18,32,“?”,问“?”是几?
2.某人出70买进一个x,80卖出,90买回,100卖出,这桩买卖怎么样?
3.月球绕地球一圈,至少要多少时间?
4.7个人用7小时挖了7米的沟,以同样的速度在50小时挖50米的沟要多少人?
5.鱼头长9,鱼尾等于鱼头加半个鱼身,鱼身等于鱼头加鱼尾,问鱼全长多少?
6.一个小姐买了一块手表,回家发现手表比她家的表慢了两分钟,晚上看新闻的时候
又发现她家的表比新闻里的时间慢了两分钟,则 。
A 手表和新闻里的时间一样
B 手表比新闻里的时间慢
C 手表比新闻里的时间快
7.王先生看到一则招聘启事,发现两个公司除了以下条件不同外,其他条件都相同
A 半年年薪50万,每半年涨5万
B 一年年薪100万,每一年涨20万
王先生想去一家待遇比较优厚的公司,他会去哪家?
10.问哪个袋子里有金子?
A袋子上的标签是这样写的:B袋子上的话是对的,金子在A袋子。
B袋子上的标签是这样写的:A袋子上的话是错的,金子在A袋子里。
11.3个人住酒店30块钱,经理找回5块钱,服务生从中藏了2块钱,找给每人1块钱,3
×(101)+2=29,问这是怎么回事?
12.三篇写作,均为书信形式。
(1)一片中文的祝贺信,祝贺某男当了某公司xx
(2)两篇英文的,一是说有事不能应邀,派别人去;另一篇是讨债的,7天不给钱就走
人(主要考business letter格式)。
大唐面试试题
1.什么是中断?中断发生时CPU做什么工作?
2.CPU在上电后,进入操作系统的main()之前必须做什么工作?
3.简述ISO OSI的物理层Layer1,链路层Layer2,网络层Layer3的任务。
4.有线电话和无线电话有何区别?无线电话特别需要注意的是什么?
5.软件开发五个主要step是什么?
6.你在开发软件的时候,这5个step分别占用的时间百分比是多少?
7.makefile文件的作用是什么?
8.UNIX显示文件夹中,文件名的命令是什么?能使文件内容显示在屏幕的命令是什么
?
9.(选做)手机用户在从一个基站漫游到另一个基站的过程中,都会发生什么?
网通笔试题
选择题(每题5分,只有一个正确答案)
1.中国1号信令协议属于 的协议。
A ccs B cas C ip D atm
2.isdnpri协议全称是 。
A 综合业务模拟网基速协议
B 综合业务模拟网模拟协议
C 综合业务数字网基率协议
D 综合业务数字网基次协议
3.路由协议中, 协议是用距离作为向量的。
A ospf B bgp C is-is D rip
4.中国智能网中,ssp与scp间最上层的ss7协议是 。
A incs B is41b C is41c D inap
5.dtmf全称是 。
A 双音多频 B多音双频 C多音三频 D三音多频
6.计算机的基本组成部分中,不包含下面设备的是 。
A cpu B输入设备 C存储器 D接口
7.脉冲编码调制的简称是 。
A pcm B pam C (delta)M D atm
8.普通电话线接口专业称呼是 。
A rj11 B rj45 C rs232 D bnc
9.现有的公共数据网都采用 。
A电路交换技术 B报文交换技术
C语音插空 D分组交换
10.ss7协议中的制止市忙消息简写为 。
A stb B slb C sub D spb
2.isdnpri协议全称是 。
A 综合业务模拟网基速协议
B 综合业务模拟网模拟协议
C 综合业务数字网基率协议
D 综合业务数字网基次协议
3.路由协议中, 协议是用距离作为向量的。
A ospf B bgp C is-is D rip
4.中国智能网中,ssp与scp间最上层的ss7协议是 。
A incs B is41b C is41c D inap
5.dtmf全称是 。
A 双音多频 B多音双频 C多音三频 D三音多频
6.计算机的基本组成部分中,不包含下面设备的是 。
A cpu B输入设备 C存储器 D接口
7.脉冲编码调制的简称是 。
A pcm B pam C (delta)M D atm
8.普通电话线接口专业称呼是 。
A rj11 B rj45 C rs232 D bnc
9.现有的公共数据网都采用 。
A电路交换技术 B报文交换技术
C语音插空 D分组交换
10.ss7协议中的制止市忙消息简写为 。
A stb B slb C sub D spb
简答题(每题10分)
1.简述普通电话与IP电话的区别。
2.简述随路信令与公路信令的根本区别。
3.说明掩码的主要作用。
4.ss7协议中,有三大要素决定其具体定位,哪三大要素?
5.描述ss7的基本通话过程。
6.简述通信网的组成结构。
7.面向连接与面向非连接各有何利弊?
8.写出爱尔兰的基本计算公式。
9.数据网主要有哪些设备?
10.中国一号协议是如何在被叫号码中插入主叫号码的?
东信笔试题目
笔试:30分钟。
1.压控振荡器的英文缩写。
2.动态随机存储器的英文缩写。
3.选择电阻时要考虑什么?
4.单片机上电后没有运转,首先要检查什么?
5.计算机的基本组成部分及其各自的作用。
6.怎样用D触发器、与或非门组成二分频电路?
机械类笔试试题
1. Briefly describe what is blanking(cutting), forming, coining and
embossing in stamping process.
2. What is metal clading?
3. What is the purpose of adding glass fiber to thermoplastic material?
4. In contrast with metal and thermoplastic material,which has a higher
coefficient of thermal expansion(CTE).
5. The most suitable material for a integral hinge design (typical plastic
thickness=0.25 to 0.5mm at hinge)
6. Can a bending load makes both compressive and tensile stress in a member?
7. What is the design criteria used in plastics catch/snap?
8. What is FEA?
9. Why is natural frequency important in vibration analysis?
10. What is the deflection equation of a cantilever beam fixed at one edge?
EE笔试试题
1. Name 3 Vehicle Buses.
2. Name 2 possible sources of Electromagnetic interference on Electronics
Circuit ASM.
3. Wavelength for 12MHz frequency signal is____
4. Name 2 important considerations for car radio performan -ce related to
audio signal processing under multipath condition?
5. What is the typical FM receiver RF signal strength to achieve 30dB S/N
机械类笔试试题
1. Briefly describe what is blanking(cutting), forming, coining and
embossing in stamping process.
2. What is metal clading?
3. What is the purpose of adding glass fiber to thermoplastic material?
4. In contrast with metal and thermoplastic material,which has a higher
coefficient of thermal expansion(CTE).
5. The most suitable material for a integral hinge design (typical plastic
thickness=0.25 to 0.5mm at hinge)
6. Can a bending load makes both compressive and tensile stress in a member?
7. What is the design criteria used in plastics catch/snap?
8. What is FEA?
9. Why is natural frequency important in vibration analysis?
10. What is the deflection equation of a cantilever beam fixed at one edge?
EE笔试试题
1. Name 3 Vehicle Buses.
2. Name 2 possible sources of Electromagnetic interference on Electronics
Circuit ASM.
3. Wavelength for 12MHz frequency signal is____
4. Name 2 important considerations for car radio performan -ce related to
audio signal processing under multipath condition?
5. What is the typical FM receiver RF signal strength to achieve 30dB S/N
for car radio?
6. When a radio is tuned to 98.1 MHz & with a LO of 108.8 MHz, what is the
image frequency?
7. For a system with a matched impedance, what is the Reflection Coefficient
and SWR?
8. Which property of the output capacitor is the primary cause of Low Drop
Out(LDO) regulator loop instability?
(1)Equivalent series resistance(ESR)
(2)Effective series inductance(ESL)
(3)Capacitance value
(4)Dielectric material
9. The switching regulator is capable of:
(1)Higher power conversion efficiency
(2)Providing an output voltage that is higher than the input
(3)Generating an output boltage oppsite in polarity to the input
(4)All of the above
10. A linear regulator op Vin(max) = 10v, Vout(min) = 4.8v, Iout(max) =
2.5mA, Iq(max) = 2
3. Wavelength for 12MHz frequency signal is____
4. Name 2 important considerations for car radio performan -ce related to
audio signal processing under multipath condition?
5. What is the typical FM receiver RF signal strength to achieve 30dB S/N
for car radio?
6. When a radio is tuned to 98.1 MHz & with a LO of 108.8 MHz, what is the
image frequency?
7. For a system with a matched impedance, what is the Reflection Coefficient
and SWR?
8. Which property of the output capacitor is the primary cause of Low Drop
Out(LDO) regulator loop instability?
(1)Equivalent series resistance(ESR)
(2)Effective series inductance(ESL)
(3)Capacitance value
(4)Dielectric material
9. The switching regulator is capable of:
(1)Higher power conversion efficiency
(2)Providing an output voltage that is higher than the input
(3)Generating an output boltage oppsite in polarity to the input
(4)All of the above
10. A linear regulator op Vin(max) = 10v, Vout(min) = 4.8v, Iout(max) =
2.5mA, Iq(max) = 2.5mA, Ta(max) = 8.5摄氏度,The regulator is available in 3
packages.Each package has the following thermal characteristics:
Package Rja(摄氏度/W) Rjc(摄氏度/W)
SO14 125 30
D1P8 100 52
Choose the most suitable package to handle the power dissipation requirement
without a heat sink and why.
软件笔试题
1. How do you code an infinite loop in C?
2. Volatile:
(1)What does the keyword volatile mean? Give an example
(2)Can a parameter be both const and volatile? Give an example
(3)Can a pointer be volatile? Give an example