RRB NTPC Coding & Decoding Questions Set-2 PDF
Download RRB NTPC Coding & Decoding Questions and Answers Set-2 PDF. Top 15 RRB NTPC Coding & Decoding questions based on asked questions in previous exam papers very important for the Railway NTPC exam.
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Instructions
In a certain language,
‘It is raining outside’ is coded as ‘fun kun sun tun’
‘Don’t play in rain’ is coded as ‘jun gun pun kun’
‘Go play outside’ is coded as ‘run gun sun’
Question 1:Â For how many words can their code words be uniquely determined?
a)Â 4
b)Â 5
c)Â 6
d)Â 8
Question 2: What is the code word for ‘Don’t’?
a)Â Jun
b)Â Pun
c)Â Sun
d)Â Cannot be determined
Question 3: What will be the code word for ‘go’?
a)Â Run
b)Â Gun
c)Â Sun
d)Â Cannot be determined
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Question 4: In a certain language ‘HISTORY’ is coded as ‘ZSPUTJI’. How will ‘FRACTURE’ be coded in the same language?
a)Â FSVVEBSG
b)Â FTVUDBTG
c)Â FQVUDBQG
d)Â FSVUDBSG
Instructions
Study the following information carefully and answer the questions which follow:
In a certain language
‘book blue yes nice’ is coded as ‘zd yt ew bl’
’nice see book clay’ is coded as ‘ew mf zd rc’
‘see book yes game’ is coded as ‘bl rc hs ew’
Question 5: For which of the following word the code is ‘rc’?
a)Â nice
b)Â clay
c)Â see
d)Â yes
Question 6: Which of the following is the code for ‘nice’?
a)Â zd
b)Â bl
c)Â od
d)Â ew
Question 7: How will ‘game’ be coded as?
a)Â bl
b)Â hs
c)Â zd
d)Â ew
Question 8: In a certain language, ‘BRACE’ is coded as ‘CQBBF’ and ‘WRONG’ is coded as ‘XQPMH’. How will ‘GIGANTIC’ be coded in the same language?
a)Â HHHZMSJB
b)Â HJHZOSJB
c)Â HHHZOSJB
d)Â HJHBMUJB
Question 9: In a certain language ‘come again go’ is coded as ‘mi xo zt’ ,‘fly soon again’ is coded as ‘zt ni vu’ and ‘back come do’ is coded as ‘kr xo wr’. What is the code for ‘go’?
a)Â xo
b)Â zt
c)Â ni
d)Â mi
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Question 10: If ‘DRAGON’ is coded as ‘CQZHPO’ and ‘PANTRY’ is coded as ‘OZMUSZ’, how is ‘GLOBAL’ coded as?
a)Â FKNDZN
b)Â FKPAZK
c)Â HMPAZK
d)Â FKNCBM
Question 11: If ‘CRUSH’ is coded as ‘HSUCR’ and ‘BRENT’ is coded as ‘TNEBR’, how will ‘TREAD’ be coded?
a)Â DARET
b)Â DAETR
c)Â ADERT
d)Â DAERT
Question 12:Â A machine codes 3 letter words using the following principle. The machine replaces the letters by their positions in the alphabetical series and then multiplies them.
Eg) CRY will be coded as 3*18*25 = 1350.
A code is said to be decipherable if the letters that make up the code can be retraced from the code (Not necessarily in the same order). If it is known that the machine processes only 3 letter words, then which of the following codes is decipherable?
a)Â 180
b)Â 2058
c)Â 40
d)Â 100
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Question 13:Â What is the code for DREAD if it is known that the code for FRIEND is ESHFME?
a)Â CSDZC
b)Â CSFZC
c)Â CSDBC
d)Â CSFBC
Question 14:Â If BEFORE is coded as FEBERO then JUNGLE is coded as :
a)Â NUJELG
b)Â NUEJDG
c)Â JELGNU
d)Â NUEJGL
Question 15: If INDUS is coded as 03865 and TENNIS is coded as 243305 then STUDENT is coded as: ·
a)Â 5268432
b)Â 5642832
c)Â 5628342
d)Â 5648324
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Answers & Solutions:
1) Answer (A)
We can see that ‘outside’ is common between the first and last sentences. The only code word common between these two sentences is ‘sun’ Hence, outside must be coded as sun. Similarly, only ‘play’ is common between second and third sentences. Hence, ‘play’ must be coded as ‘gun’. We can also see that only ‘rain’ is common between the first two sentences. Hence, using the same logic, we can say that ‘rain’ must be coded as ‘kun’. Thus, we can make the following table for the words and their code words.
2) Answer (D)
We can see that ‘outside’ is common between the first and last sentences. The only code word common between these two sentences is ‘sun’ Hence, outside must be coded as sun. Similarly, only ‘play’ is common between second and third sentences. Hence, ‘play’ must be coded as ‘gun’. We can also see that only ‘rain’ is common between the first two sentences. Hence, using the same logic, we can say that ‘rain’ must be coded as ‘kun’. Thus, we can make the following table for the words and their code words.
3) Answer (A)
We can see that ‘outside’ is common between the first and last sentences. The only code word common between these two sentences is ‘sun’ Hence, outside must be coded as sun. Similarly, only ‘play’ is common between second and third sentences. Hence, ‘play’ must be coded as ‘gun’. We can also see that only ‘rain’ is common between the first two sentences. Hence, using the same logic, we can say that ‘rain’ must be coded as ‘kun’. Thus, we can make the following table for the words and their code words.
4) Answer (D)
The pattern which is being followed here is that first the word is written in reverse order and then each letter is being replaced by the letter which comes next in the english alphabets. For example:
HISTORY => YROTSIH
Y => Z
R => S
O => P
T => U
S => T
I => J
H => I
Using the same logic, FRACTURE will be coded as ‘FSVUDBSG’
Thus, option D is the correct answer.
5) Answer (C)
We know that,
‘book blue yes nice’ is coded as ‘zd yt ew bl’
’nice see book clay’ is coded as ‘ew mf zd rc’
‘see book yes game’ is coded as ‘bl rc hs ew’
Using 1st and 2nd, we can say that book and nice can be either coded as ew or zd, see and clay can be either coded as mf or rc and, blue and yes can be either coded as yt or bl.
For 3, see must be coded as rc, the book must be coded as ew, the game must be coded as hs and yes must be coded as bl.
Thus we have,
Hence, option C is the correct choice.
6) Answer (A)
We know that,
‘book blue yes nice’ is coded as ‘zd yt ew bl’
’nice see book clay’ is coded as ‘ew mf zd rc’
‘see book yes game’ is coded as ‘bl rc hs ew’
Using 1st and 2nd, we can say that book and nice can be either coded as ew or zd, see and clay can be either coded as mf or rc and, blue and yes can be either coded as yt or bl.
For 3, see must be coded as rc, the book must be coded as ew, the game must be coded as hs and yes must be coded as bl.
Thus we have,
Hence, option A is the correct option.
7) Answer (B)
We know that,
‘book blue yes nice’ is coded as ‘zd yt ew bl’
’nice see book clay’ is coded as ‘ew mf zd rc’
‘see book yes game’ is coded as ‘bl rc hs ew’
Using 1st and 2nd, we can say that book and nice can be either coded as ew or zd, see and clay can be either coded as mf or rc and, blue and yes can be either coded as yt or bl.
For 3, see must be coded as rc, the book must be coded as ew, the game must be coded as hs and yes must be coded as bl.
Thus we have,
Hence, option B is the correct choice.
8) Answer (C)
The pattern which is being followed in the given words is that the letters at the odd positions are being replaced by the letters which succeed them in English alphabets while the letters at even positions are being replaced by the letters which precede them in the english alphabets. For example
B and W are first letters (odd positions), hence they have been replaced with C and X. Similarly R is at even position and hence, it has been replaced with Q.
Using the same logic, the code word for GIGANTIC will be HHHZOSJB
9) Answer (D)
‘come again go’ is coded as ‘mi xo zt’ and ‘fly soon again’ is coded as ‘zt ni vu’
So ‘again’ will be coded as ‘zt’.
‘come again go’ is coded as ‘mi xo zt’ and ‘back come do’ is coded as ‘kr xo wr’
So ‘come’ will be coded as ‘xo’.
Thus, ‘go’ must be coded as ‘mi’.
Hence, option D is the right answer.
10) Answer (D)
In each of the following words, the first 3 letters are replaced with the preceding alphabet and the last 3 letters are replaced with the succeeding alphabet.
Thus,
‘GLOBAL’ will be coded as “FKNCBM’.
11) Answer (B)
In every word, the last two letters are reversed and placed in the front. The first two letters are placed at the last.
Hence, ‘TREAD’ will be coded as ‘DAETR’.
12) Answer (B)
180 can be factorized as 2*2*3*3*5.
As we can see, many combinations like (6,6,5), (4,9,5), (6,3,10), etc., are possible. Therefore, we cannot retrace the letters used to make up the word.
2058 – 2*3*7*7*7
The three letters must have been (14, 21, 7). This is the only possible combination.
40 – 2*2*2*5
Again, the letters could have been (4,2,5), (8,1,5), (2,4,5), (20,1,2), (10,2,2), etc.,
100 – 2*2*5*5
Many combinations are possible in this case too.
Therefore, option B is the right answer.
13) Answer (C)
The letters at odd positions {F,I,N} are replaced by the letters preceding them in the alphabetical series (E,H,M} respectively. The letters at even positions {R,E,D} are replaced by the letters succeeding them {S,F,E} respectively.
Following the same logic,
D will be coded as C (Letter preceding it in the alphabetical series).
R will be coded as S (Letter succeeding it in the alphabetical series).
E will be coded as D (Letter preceding it in the alphabetical series).
A will be coded as B (Letter succeeding it in the alphabetical series).
D will be coded as C (Letter preceding it in the alphabetical series).
DREAD will be coded as CSDBC. Therefore, option C is the right answer.
14) Answer (A)
15) Answer (A)
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We hope this Coding & Decoding Set-2 Questions for RRB NTPC Exam will be highly useful for your Preparation.
