Coding-Decoding aptitude questions
Coding-Decoding questions are part of the Reasoning section of placement aptitude tests. Write the letter positions and compare the same positions across examples. Below are 5 worked examples with the answer and the working; practise ten fresh ones or take a timed mock when you are ready.
Example 1. In a certain code, the last letter of a word is moved to the front and the rest keep their order. How is GRAPE written in that code?
- A. GRAPE
- B. EGRAP (answer)
- C. EPARG
- D. RAPEG
Moving the last letter (E) to the front gives EGRAP.
Example 2. In a certain code, each letter moves 1 place forward in the alphabet. How is TIGER written in that code?
- A. UJHFS (answer)
- B. VKIGT
- C. TIGER
- D. SHFDQ
Shifting every letter of TIGER forward by 1 gives UJHFS.
Example 3. In a certain code, a word is written by reversing the order of its letters. How is STONE written in that code?
- A. TSONE
- B. ENOTS (answer)
- C. TUPOF
- D. STONE
Reversing STONE gives ENOTS.
Example 4. In a certain code, a word is written by reversing the order of its letters. How is CHAIR written in that code?
- A. RIAHC (answer)
- B. CHAIR
- C. HCAIR
- D. DIBJS
Reversing CHAIR gives RIAHC.
Example 5. In a certain code, each letter moves 1 place forward in the alphabet. How is STONE written in that code?
- A. STONE
- B. TUPOF (answer)
- C. RSNMD
- D. UVQPG
Shifting every letter of STONE forward by 1 gives TUPOF.
More Reasoning practice elsewhere: IndiaBIX, LearnTheta. See the 60-day aptitude plan.