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Home › UPSC › CSAT - Coding-Decoding

CSAT - Coding-Decoding — UPSC Questions & Practice

Practise 116 CSAT - Coding-Decoding questions from UPSC for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on CSAT - Coding-Decoding — with answers

Try each question first, then open the answer. Explanations are included.

1. In a certain code, each letter of the word is shifted forward by 1 position(s) in the alphabet (A becomes B, and so on, wrapping Z back to A). How is the word 'FOREST' written in this code?

  1. AMVYLZA
  2. BLUXKYZ
  3. CHQTGUV
  4. DGPSFTU
Show answer

Answer: D

Each letter of 'FOREST' is shifted forward by 1 position(s) in the alphabet to get 'GPSFTU'.

2. In a certain code, each letter of the word is shifted forward by 4 position(s) in the alphabet (A becomes E, and so on, wrapping Z back to A). How is the word 'WATER' written in this code?

  1. AAEXIV
  2. BZDWHU
  3. CYCVGT
  4. DXBUFS
Show answer

Answer: A

Each letter of 'WATER' is shifted forward by 4 position(s) in the alphabet to get 'AEXIV'.

3. In a certain code, each letter of the word is shifted forward by 1 position(s) in the alphabet (A becomes B, and so on, wrapping Z back to A). How is the word 'DELHI' written in this code?

  1. AJKRNO
  2. BKLSOP
  3. CEFMIJ
  4. DIJQMN
Show answer

Answer: C

Each letter of 'DELHI' is shifted forward by 1 position(s) in the alphabet to get 'EFMIJ'.

4. In a certain code, each letter of the word is shifted forward by 1 position(s) in the alphabet (A becomes B, and so on, wrapping Z back to A). How is the word 'INDIA' written in this code?

  1. AMRHME
  2. BPUKPH
  3. CJOEJB
  4. DOTJOG
Show answer

Answer: C

Each letter of 'INDIA' is shifted forward by 1 position(s) in the alphabet to get 'JOEJB'.

5. In a certain code, each letter of the word is shifted forward by 2 position(s) in the alphabet (A becomes C, and so on, wrapping Z back to A). How is the word 'HOUSE' written in this code?

  1. AOVBZL
  2. BJQWUG
  3. CLSYWI
  4. DMTZXJ
Show answer

Answer: B

Each letter of 'HOUSE' is shifted forward by 2 position(s) in the alphabet to get 'JQWUG'.

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