In engineering courses yes it is considered as 12th class and you are eligible to go for lateral entry admission in undergraduate engineering courses diploma courses are specialized academic program that focuses on a specific field or industry in which your practical knowledge is enhanced.

Some courses dont allow diploma degrees if they mention that 12th or 10+2 equivalent than they will surely consider diploma equivalent to 12 th.choose degrees according to your future plan.

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In Uttarakhand, as in many other regions in India, a three-year diploma obtained after completing 10th grade is often considered equivalent to the 12th class for certain purposes, especially in terms of eligibility for higher education or employment. This equivalency can vary depending on the specific institution or organization.

Many universities and colleges recognize a three-year diploma as equivalent to 12th grade for admission into undergraduate programs, particularly in fields related to the diploma. However, it's always best to check with the specific institution or program for their eligibility criteria.