Jamia Millia Islamia MCA Coding Decoding Previous Year Questions (PYQs) – Page 1 of 2
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In a certain code, LATE is written as PEXI.
Then code for TRACE is:
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Solution
Pattern observed: Each letter is moved by +4 alphabet positions.
L → P, A → E, T → X, E → I
Similarly,
T → X, R → V, A → E, C → G, E → I
Hence, TRACE → XVEGI
If $\text{LONDON}$ is coded as $\text{MPOEPO}$, what is the code for $\text{DELHI}$?
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Solution
If in a code language COME is coded as XLN V, then the code for CAT will be:
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Solution
The code pattern:
C → X (opposite letter)
O → L
M → N
E → V
Similarly, for CAT:
C → X, A → W, T → G
So, CAT → XWG
$\boxed{\text{Answer: (D) XWG}}$
In a certain code language, "STUBBORN" is written as "VUTAAOSP". How is "SHIPPING" written in that code language?
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Solution
Which of the following is code for CAT in a coding scheme in which JMI is coded as 32?
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Solution
$J=10, M=13, I=9 \Rightarrow 10+13+9=32$.
Similarly, $C=3, A=1, T=20 \Rightarrow 3+1+20=24$.
$\boxed{24}$
Which of the following is code for JMI in a coding scheme in which BAG is coded as 217?
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Solution
BAG → 2,1,7 → 217.
JMI → 10,13,9 → 10139.
$\boxed{10139}$
If CAT means 3, HE means 2, and DELHI means 5, then SAD is …
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Solution
Number represents count of letters in the word.
CAT (3), HE (2), DELHI (5) ⇒ SAD (3).
$\boxed{3}$
If ‘234’ is coded to ‘11’, then ‘123’ is coded to …
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Solution
$2 + 3 + 4 = 9$, but code = $11 = 9 + 2$ → add 2 to digit sum.
For ‘123’: $1 + 2 + 3 = 6$, $6 + 2 = 8$.
If ‘123456’ is coded to ‘615’, then ‘214652’ is coded to …
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Solution
Code logic → first and last combine:
(1,6)→6; (2,1,4,6,5,2) pattern forms 7 and 13 → 713.
$\boxed{713}$
If COMPLETED is coded as MOCELPDET, then DIRECTION will be coded as:
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Solution
In the word COMPLETED, the letters are written in reverse pair-wise:
$CO \rightarrow MO$, $MP \rightarrow CE$, $LE \rightarrow LP$, $TE \rightarrow DE$, $ED \rightarrow T$ pattern reversed.
Simpler observation: COMPLETED → MOCELPDET (reverse in pairs).
Hence, DIRECTION → RIDTCENOI.
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