Related InterviewSolutions

• Choose from among the following cipher systems, from best to the worst, with respect to ease of decryption using frequency analysis.(a) Random Polyalphabetic, Plaintext, Playfair(b) Random Polyalphabetic, Playfair, Vignere(c) Random Polyalphabetic, Vignere, Playfair, Plaintext(d) Random Polyalphabetic, Plaintext, Beaufort, PlayfairThis question was addressed to me in an interview.This is a very interesting question from Substitution and Transposition Techniques in section Classical Encryption Techniques of Cryptograph & Network Security
• Caesar Cipher is an example of(a) Poly-alphabetic Cipher(b) Mono-alphabetic Cipher(c) Multi-alphabetic Cipher(d) Bi-alphabetic CipherThis question was addressed to me in an online interview.This interesting question is from Substitution and Transposition Techniques topic in chapter Classical Encryption Techniques of Cryptograph & Network Security
• Monoalphabetic ciphers are stronger than Polyalphabetic ciphers because frequency analysis is tougher on the former.(a) True(b) FalseThe question was asked in an interview for internship.This intriguing question originated from Substitution and Transposition Techniques topic in section Classical Encryption Techniques of Cryptograph & Network Security
• The Index of Coincidence for English language is approximately(a) 0.068(b) 0.038(c) 0.065(d) 0.048This question was posed to me in exam.This intriguing question originated from Substitution and Transposition Techniques topic in portion Classical Encryption Techniques of Cryptograph & Network Security
• Reduce the following big-O natations:O[ ax7 + 3 x3 + sin(x)] =(a) O[ax^7](b) O[sin(x)].(c) O[x^7].(d) O[x^7 + x^3].I had been asked this question in an interview for internship.My question comes from Symmetric Cipher Models and Elementary Number Theory in chapter Classical Encryption Techniques of Cryptograph & Network Security
• The estimated computations required to crack a password of 6 characters from the 26 letter alphabet is-(a) 308915776(b) 11881376(c) 456976(d) 8031810176This question was posed to me in quiz.My doubt is from Symmetric Cipher Models and Elementary Number Theory topic in section Classical Encryption Techniques of Cryptograph & Network Security
• In base 26, multiplication of YES by NO gives –(a) THWOE(b) MPAHT(c) MPJNS(d) THWAEThe question was asked in exam.My query is from Symmetric Cipher Models and Elementary Number Theory topic in section Classical Encryption Techniques of Cryptograph & Network Security
• If all letters have the same chance of being chosen, the IC is approximately(a) 0.065(b) 0.035(c) 0.048(d) 0.038I have been asked this question in an international level competition.Question is from Substitution and Transposition Techniques topic in section Classical Encryption Techniques of Cryptograph & Network Security
• Divide (HAPPY)26 by (SAD)26. We get quotient –(a) KD(b) LD(c) JC(d) MCI had been asked this question in a job interview.My doubt stems from Symmetric Cipher Models and Elementary Number Theory in portion Classical Encryption Techniques of Cryptograph & Network Security
• Division of(131B6C3) base 16 by (lA2F) base 16 yeilds –(a) 1AD(b) DAD(c) BAD(d) 9ADThis question was posed to me in a national level competition.Query is from Symmetric Cipher Models and Elementary Number Theory in division Classical Encryption Techniques of Cryptograph & Network Security