Designing business solutions - Software engineering interview

In case of a waterfall model, the stages are in a sequence. Once one stage is over, the process moves to the next phase.....
Component testing, Database testing, Infrastructure testing, Security testing, Integration testing, User acceptance and usability testing, Stress, capacity, and performance testing, Capacity testing, Performance testing, Regression testing, Recording the number of bugs......
Envisioning phase of a project gathers the scope of the project, identifies risks etc......
Gathering information from an individual focuses all the attention on the individual......
Prototyping should be used when the requirements are not concrete. This is because prototyping involves......
Actors catalog collects all the actors’ information and definitions in one artifact......
Object role modeling is a method to design and query a database at a concept level....
A usage scenario gives a feeling of the real world example. It helps to realize how the interaction will take place between the user and the system...
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  • a base64String = Replace(base64String, vbCrLf, "") base64String = Replace(base64String, vbTab, "") base64String = Replace(base64String, " ", "") 'The source must consists from groups with Len of 4 chars dataLength = Len(base64String) If dataLength Mod 4 <> 0 Then Err.Raise 1, "Base64Decode", "Bad Base64 string." Exit Function End If ' Now decode each group: For groupBegin = 1 To dataLength Step 4 Dim numDataBytes, CharCounter, thisChar, thisData, nGroup, pOut ' Each data group encodes up To 3 actual bytes. numDataBytes = 3 nGroup = 0 For CharCounter = 0 To 3 ' Convert each character into 6 bits of data, And add it To ' an integer For temporary storage. If a character is a '=', there ' is one fewer data byte. (There can only be a maximum of 2 '=' In ' the whole string.) thisChar = Mid(base64String, groupBegin + CharCounter, 1) If thisChar = "=" Then numDataBytes = numDataBytes - 1 thisData = 0 Else thisData = InStr(1, Base64Chars, thisChar, vbBinaryCompare) - 1 End If If thisData = -1 Then Err.Raise 2, "Base64Decode", "Bad character In Base64 string." Exit Function End If nGroup = 64 * nGroup + thisData Next 'Hex splits the long To 6 groups with 4 bits nGroup = Hex(nGroup) 'Add leading zeros nGroup = String(6 - Len(nGroup), "0") & nGroup 'Convert the 3 byte hex integer (6 chars) To 3 characters pOut = Chr(CByte("&H" & Mid(nGroup, 1, 2))) + _ Chr(CByte("&H" & Mid(nGroup, 3, 2))) + _ Chr(CByte("&H" & Mid(nGroup, 5, 2))) 'add numDataBytes characters To out string sOut = sOut & Left(pOut, numDataBytes) Next base64_decode = sOut End Function Private Function MyASC(OneChar) If OneChar = "" Then MyASC = 0 Else MyASC = Asc(OneChar) End Function End Class ' ***** Tests ***** dim myObj, encode Set myObj = New Base64 encode = myObj.base64_encode("{""device"":""pc"",""user"":{""id"":10,""level"":1,""login_id"":""lorem29"",""login_name"":""회원가입신청"",""language"":""en""}}") Response.Write myObj.base64_decode(encode) Set myObj = Nothing %>
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