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Welcome to the Spread Spectrum Techniques MCQs Page

Dive deep into the fascinating world of Spread Spectrum Techniques with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Spread Spectrum Techniques, a crucial aspect of Digital Communication. In this section, you will encounter a diverse range of MCQs that cover various aspects of Spread Spectrum Techniques, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Digital Communication.

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Check out the MCQs below to embark on an enriching journey through Spread Spectrum Techniques. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Digital Communication.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Spread Spectrum Techniques. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Spread Spectrum Techniques MCQs | Page 7 of 13

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Q61.
The system which has insufficient information available to crypt-analyst is

a.

One-time pad

b.

Unconditionally secure

c.

One-time pad & Unconditionally secure

d.

None of the mentioned

Discuss
Answer: (c).One-time pad & Unconditionally secure
Q62.
Caesar cipher was a mono alphabetic cipher.

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q63.
In Caesar cipher, each plain text is replaced by

a.

Alphabet shift

b.

Numerals

c.

Symbols

d.

None of the mentioned

Discuss
Answer: (a).Alphabet shift
Q64.
The trithemius cipher is a mono alphabetical cipher.

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (b).False
Q65.
In auto key method

a.

Feedback is necessary

b.

Feedback is not necessary

c.

Can be either necessary or not

d.

None of the mentioned

Discuss
Answer: (a).Feedback is necessary
Q66.
In Vigenere method ______ is provided.

a.

Priming key

b.

Feedback

c.

Priming key & Feedback

d.

None of the mentioned

Discuss
Answer: (c).Priming key & Feedback
Q67.
A cipher system is said to have perfect secrecy if

a.

Posteriori probability is equal to priori probability

b.

Posteriori probability is greater than priori probability

c.

Posteriori probability is less than priori probability

d.

None of the mentioned

Discuss
Answer: (a).Posteriori probability is equal to priori probability
Q68.
The conditions for perfect secrecy are

a.

Only one key transforming message should exist

b.

All keys should be equally likely

c.

One key transforming message to each cipher text & all keys should be equally likely

d.

None of the mentioned

Discuss
Answer: (c).One key transforming message to each cipher text & all keys should be equally likely
Q69.
The _____ the uncertainty, the ______ is the information content.

a.

Lesser, greater

b.

Greater, lesser

c.

Lesser, lesser

d.

Greater, greater

Discuss
Answer: (d).Greater, greater
Q70.
The maximum number of message bits contained in each character is called as

a.

True rate

b.

Absolute rate

c.

Optimum rate

d.

None of the mentioned

Discuss
Answer: (b).Absolute rate
Page 7 of 13

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