Apkudo Interview Question for SDE1s


Country: United States
Interview Type: Written Test




Comment hidden because of low score. Click to expand.
1
of 1 vote

Id did it with a min heap. I don't know how efficient it was but worked and they liked it!
I created a 'Word' class which store 'string word' and 'List<int> line_numbers'.

Please let me know your ideas and make sure to pay attention to the constraint 'Large Text File'.

- yasharonline January 11, 2017 | Flag Reply
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0
of 0 vote

Hi. Did you take into account the case when say the heap size will overflow? Say, with the ram size of 1-2 GB there can be issues...?

- Nik January 11, 2017 | Flag Reply
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0
of 0 vote

Java implementation.... comments are welcomed.

public void findAndShow(String s) {
		Map<String,List<Integer>> map = new HashMap<String, List<Integer>>();
		String lines[] = s.split("\n");
		for(int i=0; i < lines.length; i++) {
			String words[] = lines[i].split("\\s+");
			if(words.length == 0)
				continue;
			for(int j=0; j < words.length; j++) {
				String word = words[j].toLowerCase();
				List<Integer> wordLines = map.get(word);
				if(wordLines == null)
					wordLines = new LinkedList<Integer>();
				wordLines.add(i+1);
				map.put(word, wordLines);
			}
		}
		String words[] = map.keySet().toArray(new String[0]);
		List<String> keys = Arrays.asList(words);
		Collections.sort(keys);
		for(String word: keys) {
			System.out.print(word+" ");
			for(Integer line: map.get(word)) {
				System.out.print(line+" ");
			}
			System.out.println("");
		}
	}

- Anonymous January 12, 2017 | Flag Reply
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0
of 0 vote

This is what should be done ( ZoomBA )

d = fold ( file( 'foo.txt') , sdict() ) -> {
  line_no = $.i + 1 
  partial = $.p
  line = $.o 
  tokens ( line , '\S+') -> {  
    word = $.o.toLowerCase 
    if ( word @ partial ){
      partial[word] += line_no
    } else {
      partial[word] = list( line_no )
    }
  }
  $.p // return the partial 
}
// print the stuff 
for ( d ) { printf('%s : %s\n', $.key , str( $.value , ' ' ) ) }

- NoOne January 12, 2017 | Flag Reply
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0
of 0 vote

C# implementation:

string str = "This is\nsome kind OF text it\nIs an example of text";
List<Store> store = new List<Store>();
List<string> storing = new List<string>();
string[] newArr = str.Split('\n');
for (int i = 0; i < newArr.Length; i++)
{
var massive = newArr[i].ToString().ToLower().Split(new char[0],
StringSplitOptions.RemoveEmptyEntries);
store.Add(new Store(massive , i + 1));
}
foreach (var item in store)
{
for (int i = 0; i < item.array.Count(); i++)
{
Console.WriteLine("{0} : {1}",item.array[i], item.number);
}
}

class Store
{
public int number;
public string[] array;

public Store(string[] array, int number)
{
this.number = number;
this.array = array;
}
}

- west12as January 12, 2017 | Flag Reply
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0
of 0 vote

myfile=open('testfile','r')
wdict=dict()
myfile.seek(0)
linenum=1
for line in myfile:
   words=line.lower().split()
   for i in words:
     try:
        if len(wdict[i]) > 0:
          wdict[i].append(linenum)
     except:
        wdict[i]=[linenum]
   linenum += 1

for k,v in wdict.items():
   print k, v
myfile.close()

- Phu Sam January 15, 2017 | Flag Reply


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