Thx sylar11 for your reply. Requesting for earlier interview dates with company Y and Z are impossible, interview with company Y comes in the form of a presentation to the panel of directors and the date is firm. In the case of company Z, the hr contacted me on Thursday and since Friday is a replacement holiday for them, that makes the earliest interview date, Monday clashes with my first working day with company X.

One possible strategy is to delay my start date with company X but is this better or worse than taking mc on the second day of work ? Pls advice

Company Y and Z are both FMCG mnc,

Quite straight forward. Just send an email to them saying that you do not want to take up the job due to personal issues. Apologize for the trouble you caused . If they called you up just apologize and say that you cannot take up that job due to unforeseen circumstances and it is not convenient to reveal it. At least this shows that you respect the company.

Here is my answer:

i. WOOKIE. No problem.
ii. WOOKIE. Well understood.
iii. (a) Open your mouth + provide 'em with valid and sensible reason(s) by (a) call 'em up (b) walk-in to 'em and tell 'em
iii. (b) No. No effect on you or whatsoever.

For your information, please don't be a dummy even though you are in the Software Development line.

Regards, Joey

This sounds appropriate. I don't want to show disrespect to anyone. Thanks!