Data Structures Algorithms-II MCQs

Page No. 122

Beaufort cipher is an example of ____________


amono-alphabetic cipher

✖


bpoly-alphabetic cipher

✓


ctransposition cipher

✖


dadditive cipher

✖



Vigenere cipher is harder to crack than autokey cipher.


a true

✖


b false

✓


cA & B

✖


d None of the above

✖


View Answer false

What will be the ciphered text if the string “SECRET” is given as input to the code of autokey cipher with keyword as “SANFOUNDRY”?


aKEPWSN

✓


bEKWPSN

✖


cEKWPSNFDED

✖


dKEPWSNFDED

✖


View Answer KEPWSN

In which of the following cipher the plain text and the ciphered text does not have same number of letters?


aaffine cipher

✖


bautokey cipher

✓


ccolumnar cipher

✖


d additive cipher

✖


View Answer autokey cipher

Autokey cipher is also known as?


avigenere cipher

✖


bautoclave cipher

✓


cauto key cipher

✖


dauto cipher

✖


View Answer autoclave cipher

What will be the plain text corresponding to cipher text “ZEYQC” if autokey cipher is used with keyword as “SANFOUNDRY”?


aINDIA

✖


bWorld

✖


cHELLO

✓


dSECRET

✖


View Answer HELLO

Autokey cipher is harder to crack than keyword cipher.


a True

✓


bfalse

✖


cA & B

✖


d None of the above

✖


View Answer True

Autokey cipher is closely related to ___________


aVigenere cipher

✓


bHill cipher

✖


cPlay fair cipher

✖


dRotor cipher

✖


View Answer Vigenere cipher

Which of the following correctly defines poly alphabetic cipher?


aa substitution based cipher which uses multiple substitution at different positions

✓


ba substitution based cipher which uses fixed substitution over entire message

✖


ca transposition based cipher which uses multiple substitution at different positions

✖


da transposition based cipher which uses fixed substitution over entire message

✖



Encryption in Autokey cipher is done using ___________


avigenere formula

✖


bvigenere cycle

✖


cvigenere table

✓


dvigenere addition

✖


View Answer vigenere table

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