In certain code, VIROLOGY is written as LOGYVIRO. How will SEMANTIC be written in that code?

Let us look at the pattern of the word VIROLOGY:
The word consists of 8 letters and is split exactly into two halves:

First half: VIRO

Second half: LOGY

In the code, the two halves are interchanged: LOGY + VIRO = LOGYVIRO.

Applying the exact same rule to SEMANTIC:

First half: SEMA

Second half: NTIC

Interchanging the two halves gives: NTIC + SEMA = NTICSEMA.