MCQs on Computer Security

MCQs on Computer Security

University

14 Qs

quiz-placeholder

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MCQs on Computer Security

MCQs on Computer Security

Assessment

Quiz

Computers

University

Practice Problem

Hard

Created by

Bhaskar p

Used 1+ times

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14 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

DES uses a block size of:

56 bits

64 bits

128 bits

32 bits

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

DES encryption key size is:

64 bits with 8 parity bits

56 bits of effective key

Both A and B

128 bits

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

DES operates in how many rounds?

8

16

10

20

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which structure is used in DES?

Substitution-permutation

Feistel network

Matrix-based

Polyalphabetic

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The initial and final permutations in DES are:

Different

Same

Inverse of each other

Random

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

DES S-boxes are responsible for:

Key expansion

Confusion

Diffusion

Permutation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Feistel structure allows:

Parallel encryption

Same structure for encryption/decryption

Asymmetric key usage

Unlimited key size

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