CareerCup

I attended a telephonic round for appstore testing and successfully cleared this round. Following was the 2nd question(apart from tell me abt yourself,etc):

Give all testcases for creating and renaming a folder in a parent directory, say c drive

I attended a telephonic round for appstore testing and successfully cleared this round. Following was the First question(apart from tell me abt yourself,etc):

Give me all possible test cases for gmail registration page.

give me the code for :
Given a string say "I am a human being" the output should reverse all letters of each word but not the whole string as such.
Eg: O/p should be "I ma a namuh gnieb"

I somewhat wrote the code, but i was asked what if there are extra spaces etc.
(i am able to write the code sitting at my desktop at one short but there front of interviewer i am struggling. Need to build up my confidence)
let me know the best and optimised way of writing this code.
Also i suggest people to aviod using inbuilt functions as much as possible



My Answer is as below in perl

#i want the reverse of the letters of all words in a string
#eg Input is "I am a human being" then o/p shud be "I ma a namuh gnieb"
$str="I am a human being";
@arr=split(' ',$str);
print @arr;
for($i=@arr-1;$i>=0;$i--)
{
$_=@arr[$i];
####intead of above for loop if we use foreach(@arr) then it will reverse the whole string
@word=split('',$_);
{
foreach $n (@word)
{
unshift(@final,$n);
}
}
}
print "\n @final \n";

give me a code to find all anagrams or combnations of a given work.
Say if the word given was "hello"
then
hel
he
hell
leho
lleho
and so on

Given an array say [0,1,2,3,5,6,7,11,12,14,20]
given a number say 5.
Now find the sum of elements which sum to 5
eg:2+3=5, 0+5=5 etc.
I guess the interviewer wanted all possible combinations eg 0+2+3=5, etc