Aptitude Questions on Coding Decoding for Placements
Q. 1 In a mystical land, a secret tribe communicates using a unique code. If DRAGON is coded as GUDJRP. How will TIGER be coded in the same language?
a) VJHFR
b) VJHIR
c) VKHGR
d) UKHGR
Check Solution
Ans: b) VJHIR
Observe the pattern in coding:
D → G (+3), R → U (+3), A → D (+3), G → J (+3), O → R (+3), N → P (+3).
Thus, each letter is shifted +3 positions forward in the alphabet.
T → W, I → L, G → J, E → H, R → U.
Q. 2 An old manuscript reveals a numerical code where SUGAR is written as 71913, and SALTS as 71320. Using the same code pattern, how would the word GRAIN be translated?
a) 93171
b) 93175
c) 93115
d) 97131
Check Solution
Ans: a) 93171
The code is derived from assigning specific numbers to letters:
S = 7, U = 1, G = 9, A = 1, R = 3.
Similarly, for GRAIN:
G = 9, R = 3, A = 1, I = 7, N = 1.
Q. 3 A spy agency uses a special coding method for confidentiality. If the word MIRROR is written as 123345 and ERROR is written as 34545, how would they encode the word RIMMER?
a) 312345
b) 321435
c) 213345
d) 123345
Check Solution
Ans: b) 321435
From the given codes:
M = 1, I = 2, R = 3, O = 4.
Thus, RIMMER = 321135.
Q. 4 In a magical puzzle book, words are reversed to create a code. For instance, APPLE becomes ELPPA, and TABLE becomes ELBAT. Using the same trick, how would the word CHAIR appear in this code?
a) CHIRA
b) RIAHC
c) HCARC
d) CHIRA
Check Solution
Ans: b) RIAHC
The letters are reversed in order.
Thus, CHAIR becomes RIAHC.
Q. 5 In a certain language, BRIDGE is coded as TIRCVQ. How will GARDEN be coded?
a) VTIEQM
b) VTIFQM
c) VTIQFM
d) UTIEQM
Check Solution
Ans: a) VTIEQM
Each letter is replaced as follows:
B → T, R → I, I → R, D → C, G → V, E → Q.
Similarly:
G → V, A → T, R → I, D → C, E → Q, N → M.
Q. 6 A puzzle club assigns unique codes to animals. For instance, DOG is represented as 415, and CAT as 312. What code would they assign to BAT?
a) 213
b) 312
c) 312
d) 313
Check Solution
Ans: a) 213
The code corresponds to the position of each letter in the alphabet:
D = 4, O = 15, G = 7 → DOG = 415.
B = 2, A = 1, T = 20 → BAT = 213.
Q. 7 In a certain code, FISH is written as 7648, and BOAT is written as 4529. What is the code for SOFA?
a) 8415
b) 8615
c) 8419
d) 8413
Check Solution
Ans: a) 8415
From the given codes:
F = 7, I = 6, S = 4, H = 8, B = 4, O = 5, A = 2, T = 9.
For SOFA: S = 4, O = 5, F = 7, A = 2.
Q. 8 In an enchanted diary, words are turned into numbers. For example, CLOUD is written as 34521, and SPOUT as 67890. What number would represent COLD in this magical diary?
a) 3481
b) 3751
c) 3671
d) 3421
Check Solution
Ans: a) 3481
Mapping letters to numbers:
C = 3, L = 4, O = 5, U = 2, D = 1.
Thus, COLD = 3451.
Q. 9 A group of forest animals has invented their own secret language. In this code, LION is written as PLRM. Following the same rules, how would they encode the word BEAR?
a) FIOV
b) FILV
c) FIPV
d) FIQV
Check Solution
Ans: a) FIOV
The coding rule shifts letters as follows:
L → P (+4), I → L (+3), O → R (+4), N → M (+3).
Similarly:
B → F (+4), E → I (+3), A → P (+4), R → V (+3)
Q. 10 If ROAD is written as WTEG, and LAND is written as OEPG, how will HAND be written?
a) LEQG
b) MEQF
c) MEPG
d) NEPF
Check Solution
Ans: c) MEPG
Each letter shifts alternately by +3 and +2:
R → W (+5), O → T (+5), A → E (+4), D → G (+3).
For HAND:
H → M (+5), A → E (+4), N → P (+5), D → G (+3).
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