Question 51 : What is the meaning of cipher in cryptography?
1. an algorithm that performs encryption
2. an algorithm that generates a secret code
3. an algorithm that performs encryption or decryption
4. a secret code
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Question 52 : Vigenere table consists of _________
1. 26 rows and 26 columns
2. 26 rows and 1 column
3. 1 row and 26 columns
4. 27 rows and 27 columns
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Question 53 : What is the length of the dot in Morse code?
1. 1 Unit
2. 7 Units
3. 5 Units
4. 3 Units
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Question 54 : Which of the following is used as signal duration in Morse Code?
1. Dash
2. Forward Slash
3. Apostrophe
4. Ampersand
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Question 55 : Which word offers a word rate that is typical of 5-letter code groups?
1. PARIS
2. CODEX
3. PARCOD
4. SPACE
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Question 56 : Encryption in Vigenere cipher is done using _________
1. vigenere formula
2. vigenere cycle
3. vigenere square
4. vigenere addition
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Question 57 : In Morse Code, each dot or dash within a character is followed by a period of signal absence. What is the name of that signal?
1. Slash
2. Space
3. Ampersand
4. Asterisk
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Question 58 : Which of the following correctly defines poly alphabetic cipher?
1. a substitution based cipher which uses multiple substitution at different positions
2. a substitution based cipher which uses fixed substitution over entire message
3. a transposition based cipher which uses multiple substitution at different positions
4. a transposition based cipher which uses fixed substitution over entire message
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Question 59 : What will be the ciphered text if the string 'HELLO' is given as input to the code of hill cipher with keyword as 'SANFOUNDRY'?
1. EZJ
2. JEZ
3. ZEJ
4. JZE
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Question 60 : In which of the following cipher the plain text and the ciphered text does not have a same number of letters?
1. affine cipher
2. vigenere cipher
3. columnar cipher
4. additive cipher
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