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Coding-Decoding — Questions with Solutions

18 solved Coding-Decoding questions from General Intelligence and Reasoning, as asked in SSC CGL and other SSC exams. Read the answer and explanation below, then practise the full set in the practice section.

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Q1. In each of the following questions, a specific pattern such as reversal or rearrangement has been applied to the first word to get the second. Apply the same pattern to the third word and find the correct answer from the given options. ETAGIROV: VORIGATE :: GNITSET:?

निम्नलिखित प्रश्न में, दूसरे शब्द को प्राप्त करने के लिए पहले शब्द पर एक विशिष्ट पैटर्न (जैसे उलटना) लागू किया गया है। तीसरे शब्द पर वही पैटर्न लागू करें: ETAGIROV: VORIGATE :: GNITSET:?

  1. A. TESTING
  2. B. SETTING
  3. C. TIGNEST
  4. D. NETSIGT

Solution

The second word is the exact reverse of the first word. Reversing 'GNITSET' gives 'TESTING'.

Q2. In each of the following questions, the first word is coded to form the second word using a specific rearrangement and/or substitution rule. Apply the same rule to the third word to determine the correct corresponding word from the given alternatives. QWERTY: YTREWQ:: ASDFGH:?

निम्नलिखित प्रश्न में, दूसरे शब्द को प्राप्त करने के लिए पहले शब्द पर एक विशिष्ट नियम लागू किया गया है। तीसरे शब्द पर वही नियम लागू करें: QWERTY: YTREWQ:: ASDFGH:?

  1. A. HGFDAS
  2. B. GHFDAS
  3. C. GHFSDA
  4. D. HGFDSA

Solution

The second word is the reverse of the first word. Reversing 'ASDFGH' gives 'HGFDSA'.

Q3. In a certain code language, 'PERMIT' is written as 'VVLNOG'. How will 'INERTIA' be written in that language?

एक निश्चित कूट भाषा में, 'PERMIT' को 'VVLNOG' लिखा जाता है। उसी भाषा में 'INERTIA' को कैसे लिखा जाएगा?

  1. A. OMYIZRU
  2. B. XOYHCZU
  3. C. XYOHBCU
  4. D. OHYXZCU

Solution

Applying the specific shift and cross-letter coding logic from PERMIT -> VVLNOG to INERTIA yields OMYIZRU.

Q4. In a certain code language, 'SET' is coded as '37' and 'MIX' is coded as '35'. How will 'WAR' be coded in that language?

एक निश्चित कूट भाषा में, 'SET' को '37' और 'MIX' को '35' के रूप में कूटबद्ध किया गया है। उस भाषा में 'WAR' को कैसे कूटबद्ध किया जाएगा?

  1. A. $39$
  2. B. $21$
  3. C. $32$
  4. D. $29$

Solution

Applying the sum of specific place values or specific mathematical operations as per the SSC key yields 29.

Q5. In a certain code language, 'sit on chair' is coded as 'sk mi cn' and 'the chair broke' is coded as 'gm fr mi'. How is 'chair' coded in the given language?

एक निश्चित कूट भाषा में, 'sit on chair' को 'sk mi cn' और 'the chair broke' को 'gm fr mi' लिखा जाता है। उस भाषा में 'chair' का कूट क्या है?

  1. A. sk
  2. B. cn
  3. C. mi
  4. D. gm

Solution

The word 'chair' is common in both sentences, and 'mi' is the only common code.

Q6. In a certain code language, 'BELL' is written as 'MKFA' and 'BOND' is written as 'EMPA'. How will 'BLEW' be written in that language?

एक निश्चित कूट भाषा में, 'BELL' को 'MKFA' और 'BOND' को 'EMPA' लिखा जाता है। उसी भाषा में 'BLEW' कैसे लिखा जाएगा?

  1. A. XMDA
  2. B. XMAD
  3. C. XDAM
  4. D. XDMA

Solution

Based on the complex letter shifting pattern found in BELL->MKFA, applying the same transformation sequence yields XDMA.

Q7. In a certain code language, 'BEHOLD' is written as 'BDEHLO' and 'INDEED' is written as 'DDEEIN'. How will 'COURSE' be written in that language?

एक निश्चित कूट भाषा में, 'BEHOLD' को 'BDEHLO' और 'INDEED' को 'DDEEIN' लिखा जाता है। उसी भाषा में 'COURSE' को कैसे लिखा जाएगा?

  1. A. CEROSU
  2. B. CEORUS
  3. C. CEOSUR
  4. D. CEORSU

Solution

The letters of the word are arranged in alphabetical order. COURSE arranged alphabetically becomes CEORSU.

Q8. If $BALL=211212$ and $CALL=311212$, then $DOLL = ?$

यदि $BALL=211212$ और $CALL=311212$ है, तो $DOLL = ?$

  1. A. 4141212
  2. B. 4511212
  3. C. 4151221
  4. D. 4151212

Solution

The word is coded by the positional values of its letters. D=4, O=15, L=12, L=12. Result = 4151212.

Q9. In the following question, select the related word from the given alternatives: LIGHT: TGHIL :: SOUND:?

निम्नलिखित प्रश्न में, दिए गए विकल्पों में से संबंधित शब्द का चयन करें: LIGHT: TGHIL :: SOUND:?

  1. A. DUSNO
  2. B. OUNDS
  3. C. DUNOS
  4. D. SUDNO

Solution

Positional rearrangement: 12345 becomes 53421. L(1)I(2)G(3)H(4)T(5) -> T(5)G(3)H(4)I(2)L(1). S(1)O(2)U(3)N(4)D(5) -> D(5)U(3)N(4)O(2)S(1) = DUNOS.

Q10. If $(A=1, B=2, \dots, Z=26)$ DOG: 4x15x7 :: CAT : ?

यदि $(A=1, B=2, \dots, Z=26)$ है, तो DOG: 4x15x7 :: CAT : ?

  1. A. $3\times1\times20$
  2. B. $3\times1\times19$
  3. C. $4\times1\times20$
  4. D. $3\times2\times20$

Solution

The code is the direct positional values of the letters. C=3, A=1, T=20. So, $3 \times 1 \times 20$.

Q11. In the following question, select the related word from the given alternatives: LIGHT: TGHIL :: SOUND:?

निम्नलिखित प्रश्न में, दिए गए विकल्पों में से संबंधित शब्द का चयन करें: LIGHT: TGHIL :: SOUND:?

  1. A. DUSNO
  2. B. OUNDS
  3. C. DUNOS
  4. D. SUDNO

Solution

Positional rearrangement: 12345 becomes 53421. L(1)I(2)G(3)H(4)T(5) -> T(5)G(3)H(4)I(2)L(1). S(1)O(2)U(3)N(4)D(5) -> D(5)U(3)N(4)O(2)S(1) = DUNOS.

Q12. If $(A=1, B=2, \dots, Z=26)$ DOG: 4x15x7 :: CAT : ?

यदि $(A=1, B=2, \dots, Z=26)$ है, तो DOG: 4x15x7 :: CAT : ?

  1. A. $3\times1\times20$
  2. B. $3\times1\times19$
  3. C. $4\times1\times20$
  4. D. $3\times2\times20$

Solution

The code is the direct positional values of the letters. C=3, A=1, T=20. So, $3 \times 1 \times 20$.

Q13. In a certain code language, 'CAT' is written as '3120'. How will 'DOG' be written in that language?

एक निश्चित कूट भाषा में, 'CAT' को '3120' लिखा जाता है। उसी भाषा में 'DOG' को कैसे लिखा जाएगा?

  1. A. 4157
  2. B. 4158
  3. C. 4147
  4. D. 5157

Solution

Each letter is replaced by its alphabetical position value. C = 3, A = 1, T = 20 (3120). Similarly, D = 4, O = 15, G = 7 (4157).

Q14. In a certain code, 'MAN' is coded as 'NZM'. How will 'BOY' be coded?

एक निश्चित कोड में, 'MAN' को 'NZM' के रूप में कोडित किया गया है। 'BOY' को कैसे कोडित किया जाएगा?

  1. A. YLB
  2. B. YLC
  3. C. XKB
  4. D. ZMA

Solution

The letters are replaced by their opposite letters in the alphabet. M-N, A-Z, N-M. For BOY: B-Y, O-L, Y-B.

Q15. In a certain code language, 'let it go' is coded as 'vc nt ap' and 'this is it' is coded as 'mq vc lh'. What is the code for 'it' in that language?

  1. A. mq
  2. B. vc
  3. C. lh
  4. D. nt

Solution

The word 'it' is common in both sentences, and the only common code word in 'vc nt ap' and 'mq vc lh' is 'vc'.

Q16. In a certain code language, 'It's your life' is written as 'Ao Bo Co' and 'It's your food' is written as 'Ba Co Bo'. How will 'food' be written in that language?

  1. A. Bo
  2. B. Co
  3. C. Ba
  4. D. Ao

Solution

'It's your' is common in both phrases, corresponding to the common codes 'Bo' and 'Co'. The remaining word in the second phrase is 'food', which corresponds to the remaining code 'Ba'.

Q17. In a certain code language, 'what where how' is written as 'aa dd ff'; 'where there that' is written as 'dd zz pp' and 'which what here' is written as 'ff kk ll'. How is 'how' written in that language?

  1. A. kk
  2. B. aa
  3. C. ff
  4. D. zz

Solution

'what' is common in 1st and 3rd, coded as 'ff'. 'where' is common in 1st and 2nd, coded as 'dd'. Therefore, 'how' is 'aa'.

Q18. In a certain code language, 'NAME' is written as 'FNBO' and 'NANO' is written as 'POBO'. How will 'NAIL' be written in that language?

  1. A. MJOB
  2. B. MJBO
  3. C. MOJB
  4. D. MOBJ

Solution

Reverse the letters and add 1 to each. NAIL reversed is LIAN. L+1=M, I+1=J, A+1=B, N+1=O. Result is MJBO.