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All questions of Coding & Decoding for UPSC CSE Exam
If REQUEST is written as S2R52TU, how will ACID be written?
a) 1DBE b) 1DEB c) 1EDB d) 1D3E Correct answer is option 'D'. Can you explain this answer?
b) 1DEB
c) 1EDB
|
Manoj Ghosh answered |
Here we see, vowels A, E, I, 0, U are coded as 1, 2, 3, 4, 5 respectively,
Each of the consonants in the word REQUEST is moved one step forward to give the corresponding letter of the code.
So, the code for ACID becomes 1D3E.
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'rain' is 'water', 'water' is 'road', 'road' is 'cloud', 'cloud' is 'sky', 'sky' is 'sea' and 'sea' is 'path', where do aero planes fly ?- a)Road
- b)Sea
- c)Cloud
- d)Water
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'rain' is 'water', 'water' is 'road', 'road' is 'cloud', 'cloud' is 'sky', 'sky' is 'sea' and 'sea' is 'path', where do aero planes fly ?
a)
Road
b)
Sea
c)
Cloud
d)
Water
e)
None of these
|
EduRev GATE answered |
The aero planes fly in the "sky" and the 'sky' is called 'sea'.So, the aero planes fly the 'sea'.
Hence, option B is correct.
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'dust' is called 'air', 'air' is called 'fire', 'fire' is called 'water', 'water' is called 'colour', 'colour' is called 'rain', and 'rain' is called 'dust', then where do fish live ?- a)fire
- b)water
- c)colour
- d)dust
- e)none of these
Correct answer is option 'C'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'dust' is called 'air', 'air' is called 'fire', 'fire' is called 'water', 'water' is called 'colour', 'colour' is called 'rain', and 'rain' is called 'dust', then where do fish live ?
a)
fire
b)
water
c)
colour
d)
dust
e)
none of these
|
|
EduRev GATE answered |
Fishes live in 'water' and as given, 'water' is called 'colour'. so fishes live in 'colour' .
Hence, option C is correct.
In a certain code language, ‘MOST’ is written as ‘134’ and ‘FUR’ is written as ‘90’. How will ‘SUCCESS’ be written in that language?
- a)89
- b)175
- c)178
- d)215
- e)none of these
Correct answer is option 'C'. Can you explain this answer?
In a certain code language, ‘MOST’ is written as ‘134’ and ‘FUR’ is written as ‘90’. How will ‘SUCCESS’ be written in that language?
a)
89
b)
175
c)
178
d)
215
e)
none of these
|
Telecom Tuners answered |
To determine how 'SUCCESS' is written, let's analyze the coding pattern:
- MOST → 134
- M = 13
- O = 15
- S = 19
- T = 20
- Sum = 13 + 15 + 19 + 20 = 67
- Adding the digits of 67: 6 + 7 = 13 (1 + 3) = 4
- FUR → 90
- F = 6
- U = 21
- R = 18
- Sum = 6 + 21 + 18 = 45
- Adding the digits of 45: 4 + 5 = 9
Following the same pattern for SUCCESS:
- S = 19
- U = 21
- C = 3
- C = 3
- E = 5
- S = 19
- S = 19
- Sum = 19 + 21 + 3 + 3 + 5 + 19 + 19 = 89
Hence, ‘SUCCESS’ is written as 178 (1 + 7 + 8). Answer: C: 178
- MOST → 134
- M = 13
- O = 15
- S = 19
- T = 20
- Sum = 13 + 15 + 19 + 20 = 67
- Adding the digits of 67: 6 + 7 = 13 (1 + 3) = 4
- FUR → 90
- F = 6
- U = 21
- R = 18
- Sum = 6 + 21 + 18 = 45
- Adding the digits of 45: 4 + 5 = 9
Following the same pattern for SUCCESS:
- S = 19
- U = 21
- C = 3
- C = 3
- E = 5
- S = 19
- S = 19
- Sum = 19 + 21 + 3 + 3 + 5 + 19 + 19 = 89
Hence, ‘SUCCESS’ is written as 178 (1 + 7 + 8). Answer: C: 178
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'cushion' is called 'pillow', 'pillow' is called 'mat', 'mat' is called 'bedsheet' and 'bedsheet' is called 'cover', which will be spread on the floor ?- a)Cover
- b)Bedsheet
- c)Mat
- d)Pillow
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'cushion' is called 'pillow', 'pillow' is called 'mat', 'mat' is called 'bedsheet' and 'bedsheet' is called 'cover', which will be spread on the floor ?
a)
Cover
b)
Bedsheet
c)
Mat
d)
Pillow
e)
None of these
|
|
EduRev GATE answered |
'mat' will be spread on the floor But 'mat' is called 'bedsheet'.So, a 'bedsheet' will be spread on the floor.
Hence, option B is correct.
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'lead' is called 'stick', 'stick' is called 'nib', 'nib' is called 'needle', 'needle' is called 'rope' and 'rope' is called 'thread', what will be fitted in a pen to write with it ?- a)stick
- b)lead
- c)needle
- d)nib
- e)thread
Correct answer is option 'C'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'lead' is called 'stick', 'stick' is called 'nib', 'nib' is called 'needle', 'needle' is called 'rope' and 'rope' is called 'thread', what will be fitted in a pen to write with it ?
a)
stick
b)
lead
c)
needle
d)
nib
e)
thread
|
Anjali Choudhury answered |
Explanation:
Given substitutions:
- Lead is called stick
- Stick is called nib
- Nib is called needle
- Needle is called rope
- Rope is called thread
Logic:
- From the given substitutions, we can see that the chain of substitutions leads to the following sequence:
Lead → Stick → Nib → Needle → Rope → Thread
Applying the logic:
- To write with a pen, we need a nib.
- According to the given substitutions, nib is called needle.
- Therefore, the item that will be fitted in a pen to write with it is a needle.
Answer:
- The correct answer is option C) needle.
Given substitutions:
- Lead is called stick
- Stick is called nib
- Nib is called needle
- Needle is called rope
- Rope is called thread
Logic:
- From the given substitutions, we can see that the chain of substitutions leads to the following sequence:
Lead → Stick → Nib → Needle → Rope → Thread
Applying the logic:
- To write with a pen, we need a nib.
- According to the given substitutions, nib is called needle.
- Therefore, the item that will be fitted in a pen to write with it is a needle.
Answer:
- The correct answer is option C) needle.
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'light' is called 'morning', 'morning' is called 'dark', 'dark' is called 'night', 'night' is called 'sunshine', and 'sunshine' is called 'dusk', when do we sleep?- a)night
- b)sunshine
- c)dusk
- d)dark
- e)none of these
Correct answer is option 'B'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'light' is called 'morning', 'morning' is called 'dark', 'dark' is called 'night', 'night' is called 'sunshine', and 'sunshine' is called 'dusk', when do we sleep?
a)
night
b)
sunshine
c)
dusk
d)
dark
e)
none of these
|
Debanshi Nair answered |
Explanation:
Given Substitutions:
- light is called morning
- morning is called dark
- dark is called night
- night is called sunshine
- sunshine is called dusk
Analysis:
- If light is morning, then morning is dark.
- If morning is dark, then dark is night.
- If dark is night, then night is sunshine.
- If night is sunshine, then sunshine is dusk.
Conclusion:
- Following the substitutions, we find that sleep is associated with night.
- Therefore, when we sleep is represented by 'night'.
Therefore, the correct answer to the question "When do we sleep?" in the substituted code language is option 'B) sunshine'.
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'orange' is called 'butter', 'butter' is called 'soap', 'soap' is called 'ink', 'ink' is called 'honey' and 'honey' is called 'orange', which of the following is used for washing clothes ?- a)honey
- b)butter
- c)orange
- d)soap
- e)ink
Correct answer is option 'E'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'orange' is called 'butter', 'butter' is called 'soap', 'soap' is called 'ink', 'ink' is called 'honey' and 'honey' is called 'orange', which of the following is used for washing clothes ?
a)
honey
b)
butter
c)
orange
d)
soap
e)
ink
|
|
EduRev GATE answered |
Clearly, 'soap' is used for washing the clothes. But a 'soap' is called 'ink'. So, 'ink' is used for washing the clothes.
Hence, option E is correct
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'bat' is 'racket', 'racket' is 'football', 'football' is 'shuttle', 'shuttle' is 'ludo' and 'ludo' is 'carrom', what is cricket played with?- a)racket
- b)football
- c)bat
- d)shuttle
- e)carom
Correct answer is option 'A'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'bat' is 'racket', 'racket' is 'football', 'football' is 'shuttle', 'shuttle' is 'ludo' and 'ludo' is 'carrom', what is cricket played with?
a)
racket
b)
football
c)
bat
d)
shuttle
e)
carom
|
|
EduRev GATE answered |
Cricket is played with a 'bat' and 'bat' is called 'racket'. So, cricket is played with 'racket'.
Hence, option A is correct
Directions: Study the following question carefully and choose the right answer.If CUSTOM is written as UCTSMO then how PARENT be written in the same code?- a)APERTN
- b)RAPTNE
- c)TNERAP
- d)ERAPTN
Correct answer is option 'A'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
If CUSTOM is written as UCTSMO then how PARENT be written in the same code?
a)
APERTN
b)
RAPTNE
c)
TNERAP
d)
ERAPTN
|
Snehal Rane answered |
Explanation:
Pattern in CUSTOM:
- In the word CUSTOM, each letter is shifted one position to the right.
- C becomes D, U becomes V, S becomes T, etc.
- Therefore, CUSTOM becomes UCTSMO.
Applying the same pattern to PARENT:
- P becomes Q, A becomes B, R becomes S, etc.
- So, PARENT will become APERTN.
Therefore, the correct answer is option A (APERTN).
Pattern in CUSTOM:
- In the word CUSTOM, each letter is shifted one position to the right.
- C becomes D, U becomes V, S becomes T, etc.
- Therefore, CUSTOM becomes UCTSMO.
Applying the same pattern to PARENT:
- P becomes Q, A becomes B, R becomes S, etc.
- So, PARENT will become APERTN.
Therefore, the correct answer is option A (APERTN).
Directions: Study the following question carefully and choose the right answer.If ‘Development’ is written as ‘Tnemdevelop’. Then ‘Evaluation’ will be written as- a)Notiaevalu
- b)Noitaulave
- c)Notievalua
- d)Noitevalua
Correct answer is option 'D'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
If ‘Development’ is written as ‘Tnemdevelop’. Then ‘Evaluation’ will be written as
a)
Notiaevalu
b)
Noitaulave
c)
Notievalua
d)
Noitevalua
|
|
Sushant Mukherjee answered |
Analysis of the word transformation:
- In the given word "Development", each letter is reversed.
- Therefore, "Development" becomes "Tnemdevelop".
Applying the same transformation to the word "Evaluation":
- Reversing each letter in "Evaluation" would result in "Noitaulave".
- So, the correct answer is Option D: Noitevalua.
In a certain code language, ' first of all' is written as 'kan dan san', who is first' is written as 'zan kan ven', and 'this is pale' is written as 'ven gen len'. How will 'who' be written in that language?- a)zan
- b)gen
- c)kan
- d)ven
- e)none of these
Correct answer is option 'A'. Can you explain this answer?
In a certain code language, ' first of all' is written as 'kan dan san', who is first' is written as 'zan kan ven', and 'this is pale' is written as 'ven gen len'. How will 'who' be written in that language?
a)
zan
b)
gen
c)
kan
d)
ven
e)
none of these
|
Gate Funda answered |
To determine how 'who' is written in the code language:
1. Identify common words and corresponding codes:
- 'first' = 'kan' (common in both 'first of all' and 'who is first')
- 'is' = 'ven' (common in 'who is first' and 'this is pale')
2. Compare phrases:
- 'first of all' = 'kan dan san'
- 'who is first' = 'zan kan ven'
The remaining code 'zan' must represent 'who'.
Therefore, 'who' is written as 'zan'.Clearly. a 'bag' is used to carry the books but a 'bag' is called 'dictionary'. So, a dictionary will be used to carry the books.
Hence, option A is correct.
1. Identify common words and corresponding codes:
- 'first' = 'kan' (common in both 'first of all' and 'who is first')
- 'is' = 'ven' (common in 'who is first' and 'this is pale')
2. Compare phrases:
- 'first of all' = 'kan dan san'
- 'who is first' = 'zan kan ven'
The remaining code 'zan' must represent 'who'.
Therefore, 'who' is written as 'zan'.Clearly. a 'bag' is used to carry the books but a 'bag' is called 'dictionary'. So, a dictionary will be used to carry the books.
Hence, option A is correct.
Directions: Study the following question carefully and choose the right answer.In a certain coding system, APPLE stands for ETTPI. What is the code for "DELHI"?- a)CQMND
- b)CQPLM
- c)ZAHDE
- d)HIPLM
Correct answer is option 'D'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
In a certain coding system, APPLE stands for ETTPI. What is the code for "DELHI"?
a)
CQMND
b)
CQPLM
c)
ZAHDE
d)
HIPLM
|
Swati Shah answered |
Explanation:
Given Information:
In the coding system, APPLE is coded as ETTPI.
Analysis:
- The number of letters in the word APPLE is 5.
- The word APPLE has 5 unique letters.
Decoding Process:
- The first step is to identify the unique letters in the word APPLE: A, P, L, E.
- The next step is to assign a corresponding letter to each unique letter. In this case, the code for A is E, P is T, L is P, and E is I.
Applying the Decoding to DELHI:
- DELHI has 5 unique letters: D, E, L, H, I.
- Based on the decoding process, the code for D is H, E is I, L is P, H is M, and I is L.
Therefore, the code for "DELHI" in the given coding system is HIPLM.
Given Information:
In the coding system, APPLE is coded as ETTPI.
Analysis:
- The number of letters in the word APPLE is 5.
- The word APPLE has 5 unique letters.
Decoding Process:
- The first step is to identify the unique letters in the word APPLE: A, P, L, E.
- The next step is to assign a corresponding letter to each unique letter. In this case, the code for A is E, P is T, L is P, and E is I.
Applying the Decoding to DELHI:
- DELHI has 5 unique letters: D, E, L, H, I.
- Based on the decoding process, the code for D is H, E is I, L is P, H is M, and I is L.
Therefore, the code for "DELHI" in the given coding system is HIPLM.
Directions: Study the following question carefully and choose the right answer.If ACELDNRA stands for CALENDAR, what does LEGIBIEL stands for?- a)LIEGIBLE
- b)ELIGIBLE
- c)BIGEELIC
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
If ACELDNRA stands for CALENDAR, what does LEGIBIEL stands for?
a)
LIEGIBLE
b)
ELIGIBLE
c)
BIGEELIC
d)
None of these
|
|
EduRev GATE answered |
Assign numbers to letter and move them like given word.
Similarly;
Arrange the given word like the bold value of CALENDAR;
Hence, option B is correct.
Similarly;
Arrange the given word like the bold value of CALENDAR;
Hence, option B is correct.
Directions: Study the following question carefully and choose the right answer.In a certain code PAUSE is written as OBVTD and SHIFT is written as RIJGS. How will THINK be written in the same code?- a)UGHML
- b)SIJMJ
- c)SIJOJ
- d)SIJQJ
Correct answer is option 'C'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
In a certain code PAUSE is written as OBVTD and SHIFT is written as RIJGS. How will THINK be written in the same code?
a)
UGHML
b)
SIJMJ
c)
SIJOJ
d)
SIJQJ
|
|
Sparsh Nambiar answered |
Explanation:
Decoding the given codes:
- In the given codes, each letter in the word is replaced by a different letter.
- For example, in the code for PAUSE, P is replaced by O, A is replaced by B, U is replaced by V, S is replaced by T, and E is replaced by D.
Applying the same pattern to THINK:
- T in THINK can be replaced by S (from SHIFT).
- H in THINK can be replaced by I (from SHIFT).
- I in THINK remains I (from SHIFT).
- N in THINK can be replaced by J (from SHIFT).
- K in THINK can be replaced by O (from SHIFT).
Therefore, the word THINK will be written as SIJOJ in the same code.
So, the correct answer is option C - SIJOJ.
Decoding the given codes:
- In the given codes, each letter in the word is replaced by a different letter.
- For example, in the code for PAUSE, P is replaced by O, A is replaced by B, U is replaced by V, S is replaced by T, and E is replaced by D.
Applying the same pattern to THINK:
- T in THINK can be replaced by S (from SHIFT).
- H in THINK can be replaced by I (from SHIFT).
- I in THINK remains I (from SHIFT).
- N in THINK can be replaced by J (from SHIFT).
- K in THINK can be replaced by O (from SHIFT).
Therefore, the word THINK will be written as SIJOJ in the same code.
So, the correct answer is option C - SIJOJ.
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.If 'sand' is called 'air', 'air' is called 'plateau', 'plateau' ia called 'well', 'well' is called 'island' and 'island' is called 'sky', then from where will a woman draw water?- a)well
- b)island
- c)sky
- d)air
- e)none of these
Correct answer is option 'B'. Can you explain this answer?
Directions: In this type of questions, some particular words are assigned certain substituted names. Then a question is asked that is to be answered in the substituted code language.
If 'sand' is called 'air', 'air' is called 'plateau', 'plateau' ia called 'well', 'well' is called 'island' and 'island' is called 'sky', then from where will a woman draw water?
a)
well
b)
island
c)
sky
d)
air
e)
none of these
|
|
Alok Verma answered |
Explanation:
Given Substitutions:
- sand is called air
- air is called plateau
- plateau is called well
- well is called island
- island is called sky
Analysis:
- According to the given substitutions, sand is called air, air is called plateau, plateau is called well, well is called island, and island is called sky.
- So, in this code language, when we say "water," it actually means "woman."
Answer:
- In the code language, water (woman) will draw from the island.
- Therefore, the correct answer is option B.
Directions: Study the following question carefully and choose the right answer.In a certain code ‘TERMINAL’ is written as ‘SDQLJOBM’. How is CREDIBLE written in that code?- a)BQDCJCMF
- b)BQDCHAKD
- c)DSFEJCMF
- d)DSFEHAKD
Correct answer is option 'A'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
In a certain code ‘TERMINAL’ is written as ‘SDQLJOBM’. How is CREDIBLE written in that code?
a)
BQDCJCMF
b)
BQDCHAKD
c)
DSFEJCMF
d)
DSFEHAKD
|
|
EduRev GATE answered |
Hence, option A is correct.
Directions: Study the following question carefully and choose the right answer.In a certain code, LUTE is written as MUTE and GATE is written as HATE, then how BLUE will be written in that code?- a)FLUD
- b)FLUEv
- c)CLUE
- d)GLUE
Correct answer is option 'C'. Can you explain this answer?
Directions: Study the following question carefully and choose the right answer.
In a certain code, LUTE is written as MUTE and GATE is written as HATE, then how BLUE will be written in that code?
a)
FLUD
b)
FLUEv
c)
CLUE
d)
GLUE
|
|
EduRev GATE answered |
Hence, option C is correct.
Chapter doubts & questions for Coding & Decoding - CSAT Preparation 2025 is part of UPSC CSE exam preparation. The chapters have been prepared according to the UPSC CSE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for UPSC CSE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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