If in a certain code language, "SUNDAY" is written as "TVOEBZ", then how "SCHOOL" shall be written in that language?

Shifting every letter of SCHOOL one step forward in the alphabet gives TDIPPM.

In SUNDAY to TVOEBZ each letter moves ahead by one position, S to T, U to V and so on.

Applying the same single forward shift, S becomes T and C becomes D.

H becomes I, each O becomes P, and L becomes M.

Combining these gives the code TDIPPM.