Cognitive Radio Basics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Cognitive Radio Basics, a fundamental topic in the field of Cognitive Radio. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Cognitive Radio Basics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Cognitive Radio Basics mcq questions that explore various aspects of Cognitive Radio Basics problems. Each MCQ is crafted to challenge your understanding of Cognitive Radio Basics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Cognitive Radio tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Cognitive Radio Basics MCQs are your pathway to success in mastering this essential Cognitive Radio topic.

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

So, are you ready to put your Cognitive Radio Basics knowledge to the test? Let's get started with our carefully curated MCQs!

Cognitive Radio Basics MCQs | Page 9 of 11

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Q81.
____ aids in the exploitation of unused channels.

a.

Spectrum awareness

b.

Self awareness

c.

Radio resource awareness

d.

Location awareness

Discuss
Answer: (a).Spectrum awareness Explanation:A radio that is aware of spectrum occupancy can use this information to exploit open channels on a non-interference basis. This is the first step in efficient usage of available spectrum. It is done in such a way that primary user of the spectrum is unaffected.
Q82.
____ proposes the presence of secondary users for improved spectral efficiency.

a.

Cognitive radio

b.

Software defined radio

c.

Software capable radio

d.

Programmable digital radio

Discuss
Answer: (a).Cognitive radio Explanation:Cognitive radio technologies support the presence of lower priority secondary users. This involves sensing the environment to find unused available spaces in the licensed spectrum for communication. It aims at effective usage of frequency, time and energy.
Q83.
____ gives available and unavailable spectrum frequency.

a.

Unlicensed user pattern

b.

Spectrum use pattern

c.

Licensed space pattern

d.

Licensed user pattern

Discuss
Answer: (b).Spectrum use pattern Explanation:Spectrum use pattern gives the frequencies which are unavailable and unavailable in the band of interest at a particular time and location. It is also known as radio environment, or electromagnetic environment.
Q84.
The secondary user intentionally senses surrounding environment in ____

a.

policy approach

b.

database approach

c.

active awareness

d.

passive awareness

Discuss
Answer: (c).active awareness Explanation:In active awareness, the secondary user actively senses surrounding environment and performs transmission based on the obtained information. In passive awareness, the radio environment information is obtained outside the secondary communication system.
Q85.
____ involve the measurement of distinctive features to label and describe individuals.

a.

Electrical signals

b.

Biometrics

c.

Biostatistics

d.

Physical signals

Discuss
Answer: (b).Biometrics Explanation:Biometrics involves the measurement of distinctive features to label and describe individuals. These features are either physiological or behavioural. Different aspects of human physiology, chemistry, and behaviour can be used for biometric authentication.
Q86.
Which among the following is not a behavioural biometric identifier?

a.

Voice recognition

b.

Gait

c.

Fingerprint

d.

Typing rhythm

Discuss
Answer: (c).Fingerprint Explanation:Behavioural biometrics is a subclass of biometrics involving the measurement of unique, distinctive and measurable pattern in individuals. Software is required for analysis. It is cost effective means to improve security.
Q87.
Which among the following is not a characteristic of biometric?

a.

Measurability

b.

Shape

c.

Universality

d.

Permanence

Discuss
Answer: (b).Shape Explanation:Universality indicates every individual should possess the trait. Permanence indicates the selected trait must remain invariant for longer period of time. Measurability indicates the means to obtain the biometric.
Q88.
During ____, the biometric of an individual is captured and stored.

a.

sampling

b.

enrollment

c.

admission

d.

learning

Discuss
Answer: (b).enrollment Explanation:The first time an individual uses a biometric system is called as enrollment. During enrollment, the biometric of an individual is captured and stored. At any time, the biometric information is detected and compared with the information stored at the time of enrollment.
Q89.
The first step in verification mode is to ____ users.

a.

perform one to one comparison of

b.

perform one to may comparison among

c.

run recognition of

d.

generate reference model for

Discuss
Answer: (d).generate reference model for Explanation:Verification mode involves three steps. The first step is to generate reference models for users. Then samples are matched with reference model to generate a threshold for recognition. The third step involves testing.
Q90.
Triangulation may be used for geo-location.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True Explanation:Triangulation is the process of determining the location of an unknown point by forming triangles to it from known points. In the absence of GPS, triangulation may be used for geo-location based on cooperative and non-cooperative sensing.
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