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Reasoning Aptitude

CODING AND DECODING MCQs

Coding-Decoding

Total Questions : 673 | Page 1 of 68 pages
Question 1. If POND is coded as RSTL, how can HEAR be coded?
  1.    GHIJ
  2.    GHIZ
  3.    JIGZ
  4.    JCLZ
  5.    None of these
 Discuss Question
Answer: Option C. -> JIGZ
 -  The first, second, third and fourth letters of the word are respectively moved two, four, six and eight letters forward to obtain the code
Question 2. If TABLE is coded as GZYOV, how can JUICE be coded?
  1.    OZLFJ
  2.    QFRXV
  3.    HOFAD
  4.    QZHMT
  5.    EPQIL
 Discuss Question
Answer: Option B. -> QFRXV

 -  If in the word, a letter is the nth letter from the beginning of English alphabets, then in the code the corresponding letter is the nth letter from the end.

The given question is based on coding and decoding. The given code TABLE is coded as GZYOV. To find the code for JUICE, we need to decode the given word TABLE to identify the pattern or rule followed in the coding process.

Here, the code for each letter in TABLE is obtained by subtracting its position from the total number of letters in the word (5 in this case) and then adding 20 to the result. For example, the letter T is the 20th letter in the alphabet, so its code is obtained as follows:

Code for T = (5 - 20) + 20 = 5

Similarly, we can decode the rest of the letters in TABLE to obtain the following codes:

A = 15

B = 14

L = 11

E = 10

Using this pattern, we can find the code for JUICE as follows:

Code for J = (5 - 10) + 20 = 15

Code for U = (5 - 21) + 20 = 4

Code for I = (5 - 9) + 20 = 16

Code for C = (5 - 3) + 20 = 22

Code for E = (5 - 10) + 20 = 15

Hence, the code for JUICE is QFRXV, which is option B.

Therefore, the correct answer is option B QFRXV.

To summarize, the solution to the given question involves the following steps:

  • Decode the given word TABLE to identify the coding pattern.
  • Use the identified pattern to find the code for each letter in JUICE.
  • Combine the codes for all the letters in JUICE to obtain the final code.
  • Verify the obtained code with the given options to identify the correct answer.

Some important terms and formulas used in coding and decoding are:

  • Coding: It refers to the process of converting a message into a code or cipher to make it unreadable to unauthorized recipients.
  • Decoding: It refers to the process of converting a coded message back into its original form.
  • Cipher: It is a system of encoding and decoding a message using a set of rules or algorithms.
  • Position of a letter in the alphabet: It refers to the numerical position of a letter in the English alphabet, starting from A=1, B=2, and so on.
  • Formula for coding a letter: Code for a letter = (Total number of letters in the word - Position of the letter) + 20

If you think the solution is wrong then please provide your own solution below in the comments section .

Question 3. If CERTAIN is coded as XVIGZRM, how can MUNDANE be coded?
  1.    MFMXZMV
  2.    NFMWZMV
  3.    NFMWZMX
  4.    VMZWMFN
  5.    None of these
 Discuss Question
Answer: Option B. -> NFMWZMV
 -  Each letter in the word is replaced by the letter which occupies the same position from the other end of the alphabet, to obtain the code.
Question 4. If DELHI is coded as CCIDD, how can BOMBAY be coded?
  1.    AJMTVT
  2.    AMJXVS
  3.    MJXVSU
  4.    WXYZAX
  5.    None of these
 Discuss Question
Answer: Option B. -> AMJXVS
 -  The first, second, third …. Letters of the word are respectively moved one, two, three…. Steps backward to obtain the corresponding letters of the code
Question 5. According to a military code, SYSTEM is SYSMET and NEARER is AENRER. What is the code for FRACTION?
  1.    CARFTINO
  2.    FRACNOIT
  3.    CARFTION
  4.    ARFCNOIT
  5.    CARFNOIT
 Discuss Question
Answer: Option E. -> CARFNOIT
 -  The letters in the first half and the latter half of the word are separately reversed to obtain the code
Question 6. In a certain code, INSTITUTION is coded as NOITUTITSNI how is PERFECTION coded in that language?
  1.    NOICTEFREP
  2.    NOITCEFERP
  3.    NOITCEFRPE
  4.    NOITCEFREP
  5.    NOITCEFPER
 Discuss Question
Answer: Option D. -> NOITCEFREP
 -  The letters of the word are written in a reverse order to obtain a code
Question 7. If BELIEF is coded as afkkdi, how can SELDOM be coded?
  1.    tfkenp
  2.    rfkfnp
  3.    rfkenn
  4.    rdkenl
  5.    None of these
 Discuss Question
Answer: Option B. -> rfkfnp
 -  The first, third and fifth letters of the word are each moved one step backward, while the second, fourth and sixth letters are respectively moved one, two and three steps forward to obtain the corresponding letters of the code
Question 8. In a certain code, DISTANCE is coded as IDTUBECN and DOCUMENT is written as ODDVNTNE, how is THURSDAY coded in that language?
  1.    DTVSTEYA
  2.    HTTQRYAD
  3.    HTVSTYDA
  4.    HTVSYADS
  5.    HTVSTYAD
 Discuss Question
Answer: Option E. -> HTVSTYAD
 -  The places of the first two letters and the sixth and eighth letters of the word are interchanged, while the third, fourth and fifth letters are moved one step forward to obtain the code
Question 9. In a certain code, CHAMPION is coded as HCMAIPNO how is NEGATIVE coded in that language?
  1.    ENAGITEV
  2.    NEAGVEIT
  3.    MGAETVIE
  4.    EGAITEVN
  5.    NEGATIEV
 Discuss Question
Answer: Option A. -> ENAGITEV
 -  The letters of the word are reversed in order, taking two at a time, to obtain the code
Question 10. If PEOPLE is coded as PLPOEE, how can TREND be coded?
  1.    TREDN
  2.    DNERT
  3.    NDETR
  4.    TRDNE
  5.    TNERD
 Discuss Question
Answer: Option E. -> TNERD

 -  The first and last letter remain unchanged, while the second and second last, third and third last letter and so on are interchanged, to obtain the code.

The given code for "PEOPLE" is "PLPOEE". We can observe that the code for each letter is made up of a pair of letters:

  • The first letter of each pair is the original letter in the word.
  • The second letter of each pair is the next letter in the word.

Using this logic, we can determine the code for "TREND" as follows:

  • The first letter is "T", so the first letter of the code is "T".
  • The next letter after "T" in the word "TREND" is "N", so the second letter of the code is "N".
  • The next letter after "N" in the word "TREND" is "E", so the third and fourth letters of the code are "E".
  • The next letter after "E" in the word "TREND" is "R", so the fifth letter of the code is "R".
  • The next letter after "R" in the word "TREND" is "D", so the sixth letter of the code is "D".

Therefore, the code for "TREND" is "TNERD", which is option E.

In summary, we can use the following formula to determine the code for a given word:

  • For each letter in the word, take the original letter followed by the next letter in the word.
  • Combine all pairs of letters to form the code for the word.

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