Yes same. Polytechnic is a diploma or vocational course in which an institute focuses on delivering technical education. Generally, polytechnic courses are a three year programme after completion of which candidates obtain a certificate.

Undergraduate usually refers to a student studying their first degree. Completing an undergraduate course leads to the award of a diploma, advanced diploma, associate degree, or - most commonly - a bachelor degree. Undergraduate courses can be studied at university or at private higher education providers.

For more information :-https://engineering.careers360.com/articles/polytechnic

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