Hash Functions MCQs

12 MCQs — Computer Networks MCQs (Page 1 of 2)

Practice Hash Functions MCQs with correct answers and explanations. These questions are from the Computer Networks MCQs section.

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Which of the following equation is correct in case of hash function, where M = input, N = hash value, H = hash function?

A. H = m(n)
B. M = h(n)
C. N = h(m)
D. N = m(h)

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What is/are the property(s) of a good hash function in case of producing outputs for set of inputs?

A. Apparently random hash values
B. Evenly distributed hash values
C. Apparently random and evenly distributed values
D. Evenly distributed but not apparently random values

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What is the core objective of the hash functions in producing hash values?

A. Integrity
B. Authenticity
C. Confidentiality
D. Security

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What is the name for hash functions that are used in security applications?

A. Secured hash function
B. Cryptographic hash function
C. Security hash function
D. Crypt-analysis hash function

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Which of the following application in which hash function is employed, refers hash value as message digest?

A. Message authentication
B. Virus detection
C. Digital signatures
D. One-way password file

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What is the other name for key hash function, which is used in message authentication?

A. Message administration control
B. Message authentication code
C. Message administration code
D. Message authentication control

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What is Ci in the bit-by-bit XOR hash function, that is Ci = bi1 + bi2.….. + bim

A. Number of n bit blocks
B. Ith bit of the hash code
C. Ith bit in jth block
D. Xor operation

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When can we detect a collision if the hash values are same for two inputs, that is H(x) = H(y)?

A. When x < y
B. When x > y
C. When x = y
D. When x != y

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What is the formula for pre-images of a given hash value, where data block length = b bits and hash code = n bits?

A. 2b-n
B. 2b+n
C. 2b/n
D. 2n/b

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Which of the following is not a basic property for employing hash function in practical applications?

A. Variable input size
B. Fixed output size
C. Efficiency
D. Preimage resistant

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