InterviewBit Problems   Longest Common Prefix : Unsolved

Please add 2 ABCD ADCB test case (1)
WA for correct output (1)
Shows wrong answer while running and correct answer on same input in custom input (1)
Wrong answer with same expected and returned value? (1)
Getting same error, my ouput is abc and expected output is also abc but then also it is showing a error (1)
Getting some weird error, even though the output is matching with the expected va (3)
Different result while testing and submitting (2)
Why does this throw an error of undefined reference (1)
A : [ "abcd", "abcd", "efgh" ] your function returned the following : expected ou (2)
Am i supposed to malloc memory for preparing the output string...? (2)
A : [ "ABCD" ] Your function returned the following : ABCD The expected returned (1)
What to do when you get internal error? (1)