MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Discrete Mathematics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the block size of RC6 Feistel block cipher? |
| A. | 5013 bits |
| B. | 128 bits |
| C. | 596 bits |
| D. | 1768 bits |
| Answer» C. 596 bits | |
| 2. |
How many combinations of keys can be constructed from a 72 ciphertext stream cipher? |
| A. | 4271 |
| B. | 7345 |
| C. | 3291 |
| D. | 2556 |
| Answer» E. | |
| 3. |
The default key size of RC2 Feistel cipher is _______ |
| A. | 64GB |
| B. | 64 bits |
| C. | 64 bytes |
| D. | 64KB |
| Answer» D. 64KB | |
| 4. |
_______ are used as the base of the Public Key Infrastructure. |
| A. | SSL certificates |
| B. | TLS certificates |
| C. | X.509 certificates |
| D. | HAS certificates |
| Answer» D. HAS certificates | |
| 5. |
In encryption, which of the following is the best text encoding technique? |
| A. | ASCII encoding |
| B. | Hex-encoding |
| C. | Unicode technique |
| D. | Base64 encoding |
| Answer» D. Base64 encoding | |
| 6. |
Let A’s public key is n=6, 736, 180, 7817, 961, 456, 267 and e = 5 and B sends the ciphertext. c = 456, 871, 122, 391, 882, 538 to A. Determine B’s message in numeric format? |
| A. | 235813 |
| B. | 57971.89 |
| C. | 770190.04 |
| D. | 687651.9 |
| Answer» D. 687651.9 | |
| 7. |
TEA cipher uses which of the following structure? |
| A. | standard cipher structure |
| B. | pseudo random structure |
| C. | feistel structure |
| D. | block structure |
| Answer» D. block structure | |
| 8. |
If there are 256 cipher texts per plain text and a total of 218 plaintexts of length 18 exists. Then determine the number of distinct ciphertexts? |
| A. | 761 |
| B. | 274 |
| C. | 186 |
| D. | 289 |
| Answer» C. 186 | |
| 9. |
In which of the following systems, encryption slower than decryption? |
| A. | elliptic curve cryptography |
| B. | parabolic curve cryptography |
| C. | symmetric cryptography |
| D. | antisymmetric cryptography |
| Answer» C. symmetric cryptography | |
| 10. |
How many bytes of the secret key is generated using Diffie-Hellman encryption/decryption scheme? |
| A. | 256 |
| B. | 871 |
| C. | 1024 |
| D. | 962 |
| Answer» B. 871 | |