shaileshagarwal1
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1of 1 vote
AnswersDesign an Email sender, need to send 100,000000 emails and you have 5 machines how could you do it efficiently.
- shaileshagarwal1 in India for Transportation Team| Report Duplicate | Flag | PURGE
Amazon SDE-2 Software Design - 1
0of 0 votes
AnswerGiven an URL you need to analyze all the images( they may be in 1000’s of number) and return the cumulative quality of images present in that url.
- shaileshagarwal1 in India for Transportation Team
lets say: you can configure image quality as very good, good, average, poor..etc, so you have to return one value among them.The given URL may contain several other URLs and they also contain lot of images . you need to consider all of them. lot of questions like how to avoid visiting same url again,
how would you determine the quality of an image if you encounter an url that contains only an image..etc.| Report Duplicate | Flag | PURGE
Amazon SDE-2 Software Design - 0
0of 0 votes
AnswersDesign Elevator system. And then write an algorithm for that Design such that, the user request should be completed in logN time in a N story building with M elevators.
- shaileshagarwal1 in India for Transportation Team| Report Duplicate | Flag | PURGE
Amazon SDE-2 Software Design - 1
0of 0 votes
AnswerIn an online teaching system, there are n number of teachers and each one teaches only one subject to any number of students.
- shaileshagarwal1 in India for Transportation Team
And a student can join to any number of teachers to learn those subjects.
And each student can give one preference through which he can get updates about the subject or class timings etc.
Those preferences can be through SMS or twitter/facebook or email..etc.
Design above system and draw the diagram for above.| Report Duplicate | Flag | PURGE
Amazon SDE-2 Software Design
With smallest use of memory and O(n^2) .
- shaileshagarwal1 October 13, 2015public class StringCompress
{
public static String compress(final String source)
{
String str = source;
final StringBuilder sb = new StringBuilder();
int i = 0;
int max = 1;
max = firstSubstringWithoutDuplication(source);
String last = str.substring(i,i+max);
int j=i+1;
i = i+max;
int count = 1;
boolean flag = true;
String current = "";
while (i < str.length())
{
if(i+max<=str.length())
current = str.substring(i,i+max);
else
current = str.substring(i);
if (current.equals(last))
{
count++;
i = i+max;
flag = false;
}
else if(flag)
{
sb.append(count);
sb.append(last.charAt(0));
count = 1;
max = firstSubstringWithoutDuplication(source.substring(j));
if(j+max<=str.length())
last = str.substring(j,j+max);
else
last = str.substring(j);
i=j+max;
j=j+1;
}
else
{
sb.append(count);
sb.append(last);
count = 1;
max = firstSubstringWithoutDuplication(source.substring(i));
last = str.substring(i,i+max);
i=i+max;
}
}
sb.append(count);
sb.append(last);
return sb.toString();
}
public static void main(final String[] args)
{
System.out.println(compress("aab"));
System.out.println(compress("aasasatb"));
System.out.println(compress("abcdbcdff"));
System.out.println(compress("xyzabcdbcdff"));
}
public static int firstSubstringWithoutDuplication(String str) {
int maxLength = 1;
int checker = 0;
for (int i = 0; i < str.length(); i++) {
int val = str.charAt(i) - 'a';
if ((checker & (1 << val)) > 0){ return i; }
checker |= (1 << val);
}
return maxLength;
}
}
Yes they can send emails simultaneously and machines having equal processing power.
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class GasStation {
- shaileshagarwal1 June 26, 2016public static int canCompleteCircuit(int[] gas, int[] cost) {
if(gas == null || cost == null) return -1;
int total = 0;
int upToNow = 0;
int startPos = 0;
for(int i=0; i<gas.length; i++) {
int delta = gas[i] - cost[i];
if(upToNow >= 0) upToNow += delta;
else {
upToNow = delta;
startPos = i;
}
total += delta;
}
return total >= 0 ? startPos : -1;
}
public static void main(String[] args) {
int[] gas = {3,5,7};
int[] cost = {8,4,3};
System.out.println(canCompleteCircuit(gas, cost));
}
}