NTA UGC NET/JRF Exam, September-2022 (Electronic Science)

Total Questions: 100

91. Read the following paragraph and answer the five questions that follow:

The internet of things (IOTs) and data analytics are the most significant emerging technologies in recent years that have a disruptive and transformational effect to every industry around the world.

The IOT is a technology digitizing the physical world and is a promiment driver to the fourth industrial revolution (IR) that will have the impacts across the business and industry continuum around the world. Business executives and informed citizens are positively anticipating of the fourth IR and digital revolution with low impacts on employments.

Applying IOT in to realm of our lives opens-up a host of new opportunities and challenges for consumers, enterprise and Government, IOT products and services enable improvements in productivity and time to market and create thousands of businesses and millions of jobs. Our lives are improved but at the cost of higher energy consumption that directly impacts our environment.
Which of the following is not used as a security protocols?

Correct Answer: D. XMPР

92. Which of the following is most commonly used IOT standards for Medium Access Control (MAC)?

Correct Answer: A. IEEE, 802.15.4

93. Match List-I with List-II:

List-I (Technologies for IOT)List-II (Definitions)
(a) SensorsI. Analytical tools that improve the ability to describe phenomenons
(b) NetworksII. Commonly accepted prescriptions for action
(c) Augmented intelligenceIII. A device that generates an electronic signal from a physical condition
(d) StandardsIV. A mechanism for communicating an electronic signal

Choose the correct answer from the options given below:

(a)(b)(c)(d)
A.IIIIIIIV
B.IIIIVIII
C.IIIIVIII
D.IIIIVIII
Correct Answer: C.

94. Arrange the following IOT technologies in ascending order of their wireless rang

(a) Near-field communication
(b) Wi-Fi
(c) Blue tooth low energy
(d) Cellular networks
Choose the correct answer from the options given below:

Correct Answer: B. (a), (c), (b), (d)

95. Which of the following communication technologies has highest data rate?

Correct Answer: B. 4G

96. Read the following paragraph and answer the five questions that follow:

A digital counter is a set of flipflops whose states change in response to the pulses applied at Input. Counters can be asynchronous counters or synchronous counters. A counter is an example of a state machines; the number of states is called the modulus.

Two basic types of state machines are the Moore and the Mealy. In Moore machine, the combinational logic is a gate array with outputs that determine the next state of the flip-flops in the memory. For.Mealy machine, the present state affects just as in Moore machine but in addition, the inputs also affect the outputs.
The components of a synchronous counter are given below. Arrange these in order of their occurrence for design of synchronous counters.
(a) Next-state table
(b) Flip-flop transition table
(c) Karnaugh maps
(d) State diagram
(e) Logic expressions for flipflop inputs
Choose the correct answer from the options given below:

Correct Answer: C. (d), (a), (b), (c), (e)

97. A binary ripple counter is required to count upto 16,38310. If the clock frequency is 8,192 MHz, the number of flip-flops required and frequency of the output of MSB respectively are:

Correct Answer: D. 14,500 Hz

98. Which of the following statements is correct about counter?

Correct Answer: B. The main drawback of Asynchronous counters is their low speed as clock is propagated through a number of flip-flops

99. In a 4-bit asynchronous binary counter, each D flip-flop is negative edge-triggered and has a propagation delay for 10 nanoseconds. What is the highest frequency allowed for the couner to avoid problems due to propagation delay?

Correct Answer: C. 25 MHz

100. Which of the following statements is not correct about Glitch?

Correct Answer: B. Glitch causes more problems with synchronous counters than with asynchronous counters