MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What will be the plain text corresponding to ciphered text BKC if the bifid cipher is used for encryption with key as KEY and period 5? |
| A. | MSD |
| B. | SRT |
| C. | KVK |
| D. | VVS |
| Answer» D. VVS | |
| 2. |
What will be the plain text corresponding to cipher text XKS if the bifid cipher is used with key as KEY and period as 5? |
| A. | IND |
| B. | USA |
| C. | RSA |
| D. | AUS |
| Answer» C. RSA | |
| 3. |
What will be the ciphered text corresponding to ALGORITHM if bifid cipher is used for encryption with key as KEY with a period as 5? |
| A. | SBPISZTKZH |
| B. | PLNSOWGKQM |
| C. | SELFQEXBHM |
| D. | YFSGWNFBW |
| Answer» E. | |
| 4. |
Bifid square combines autokey square with transposition. |
| A. | true |
| B. | false |
| Answer» C. | |
| 5. |
Trifid cipher encrypts the plain text by using bifid cipher twice. |
| A. | true |
| B. | false |
| Answer» C. | |
| 6. |
Bifid cipher combines transposition with which of the following cipher? |
| A. | Polybius square cipher |
| B. | Playfair cipher |
| C. | gronsfeld cipher |
| D. | trifid cipher |
| Answer» B. Playfair cipher | |
| 7. |
Which of the following cipher uses polybius square? |
| A. | bifid cipher |
| B. | beaufort cipher |
| C. | trithemius cipher |
| D. | gronsfeld cipher |
| Answer» B. beaufort cipher | |
| 8. |
What is the period in bifid cipher? |
| A. | length of blocks in which the plain text is divided before encryption |
| B. | number of letters after which the key is repeated |
| C. | number of blocks into which the plain text is divided before encryption |
| D. | number of keys used for encryption |
| Answer» B. number of letters after which the key is repeated | |