This is the complementary material for the paper: "Relationships between Software Architecture and Source Code in Practice: An Exploratory Survey and Interview", which is currently under review. We provide a brief description of the files and folder. 1. Valid Responses of the Questionnaire.xlsx comprises the 87 valid survey responses that were collected by sending the questionnaire to 1000 participants. 2. Interview Transcript includes eight files (Interview Transcript_IP1.docx - Interview Transcript_IP8.docx) of the interview transcripts from eight practitioners. 3. Data Labeling & Encoding.mx18 is the results of data labeling and encoding that were analyzed by the MAXQDA tool. We extracted the answers of open questions from the questionnaire and interview instrument, labeled them with the number of respondents and interviewees (e.g., Respondent1, Respondent2, Interview Transcript_IP1), and encoded the extracted data using Grounded Theory. The file can be opened by MAXQDA 18 or higher versions, which are available at https://www.maxqda.com/ for download. You may also use the free 14-day trial version of MAXQDA 2018, which is available at https://www.maxqda.com/trial for download.