Important Problems
Q1.) Using certain rules, 16890 is written as TYUVG, and 5341 is written as ORST. How will 34651 be written in that code?
Answer: 34651 would be written as RSYOT using coding because the numbers are coded as alphabets like the following:
3 -> R,
4 -> S,
6 -> Y,
5 -> O, and
1 -> T in given data.
Q2.) Coding the word DELHI using a particular pattern, the word is written as EFMIJ. How would PERSON be written in the same code?
Answer: Every alphabet of DELHI is increased by one, and the result of coding it is a word with the next letter of the respective alphabet. So, PERSON would be written as QFSTPO.
Q3.) Coding the word MOON using a particular pattern, the word is written as NQRR. How would FOREST be written in the same code?
Answer: FOREST would be written as GQUIXZ on coding. It is because the first alphabet in MOON is increased by 1, the second alphabet by 2, the third by 3 and so on.
M -> (+1) -> N
O -> (+2) -> P Q
O -> (+3) -> P Q R
N -> (+4) -> O P Q R
Here, MOON -> NQRR.
Q4.) In a certain language, BIRTHDAY is written as TRIBYADH. How is MOUNTAIN written in this code?
Answer: Let us try to decipher on BIRTHDAY being TRIBYADH. We can see that the word is divided into two parts. Then each part is shuffled as follows:
BIRT -> TRIB
HDAY -> YADH
Similarly, the same pattern is followed for MOUNTAIN:
MOUNTAIN will be written as NUOMNIAT.
Q5.) In a certain code, NUMBER is written as NVOSFC. What would be MOBILE coded as?
Answer: Let us first understand how NUMBER became NVOSFC.
NUM -> MUN -> (incrementing by 1) -> NVO
BER -> REB -> (incrementing by 1) -> SFC
Similarly,
Hence, it can be written as CPNFMJ.
Q6.) In a certain code, NEWJERSEY is written as 124. What would NUMBER be written as on coding?
Answer: In NEWJERSEY, 14+5+23+10+5+18+19+5+25=124.
Using a similar pattern while coding NUMBER, 14+21+13+2+5+18=73. So, the NUMBER would be 73.
Table of letters encoded to numbers(For reference):
Q7.) In a certain code, STARE is written as 27. What would be the code for ACTIVE using the same pattern?
Answer: In STARE,
S=19 -> 1+9=10 (Note: If any letter encoded to a number is not a single-digit number, then add all the digits.)
T=20 -> 2+0=2
A=1
R=18 -> 1+8=9
E=5
Then, add up the values of each = 10+2+1+9+5 = 27
Therefore, ACTIVE would be 24.
Q8.) If BREAD is coded as CQFZE in a certain language, then which word would be coded as TVJOF?
Answer: Every alphabet at odd places in the word is one step behind, and the alphabets at even places are one step ahead of the corresponding alphabet in the code.
Q9.) If 256 means “you are good”, 637 means “you are bad”, and 358 means “good and bad” in a certain code, then which number represents “and” in that code?
Options: 3, 10, 8, 4
Answer: The common digit in the first and third statements is 5, and the common word in both these statements is “good”. This implies that 5 means “good”.
The common digit in the second and third statements is 3, and the common word is “bad”, meaning that 3 is for “bad”. Therefore, 8 means “and” in the third statement.
Q10.) In a certain code, if “lee iff nop” means “what are you”, and “kim lee nop” means “how are you”, then what is the code for “how”?
Answer: The common code in the first and second sentences is “lee” and “nop”, and the common words are “are” and “you”. So in the second sentence, the remaining code is “kim”, which is the code for “how”.
Frequently Asked Questions
What is the difference between coding and decoding?
Coding means encrypting words or numbers in a code, while decoding refers to decrypting the patterns into the original words or the original form of the code.
What are the main kinds of coding questions?
Coding-decoding questions usually have the following types: Letter coding, number coding, substitution coding and mixed coding.
What is substitution coding?
Substitution coding is the kind of coding where particular words are assigned to words or phrases. The given phrase could have a substituted name that needs to be decoded.
Are the exam questions on coding and decoding easy?
The questions on this topic are often asked for 4-6 marks and, despite seeming time-consuming, are easy to answer.
How many kinds of coding-decoding questions are there?
There can be many types of questions in this section, including number pattern coding, letter pattern coding, symbol coding, substitution coding and deciphering questions.
Conclusion
In this article, we covered the concepts of coding, decoding and their types. We also looked at some of the sample questions for practice.
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