Dear candidates you will find MCQ questions of Computer Architecture and Organization here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Explanation: mac address spoofing is an example of data-link layer vulnerability.
Explanation: route spoofing is an example of network layer vulnerability. other examples of network layer vulnerabilities are ip address spoofing and identity & resource id vulnerability.
Explanation: fiber optics is considered to have the highest transmission speed among the all mentioned above. the fiber optics transmission runs at 1000mb/s. it is called as 1000base-lx whereas ieee standard for it is 802.3z. it is popularly used for modern day network connections due to its high transmission rate.
Explanation: in analog modulation, digital low frequency baseband signal (digital bit stream) is transmitted over a higher frequency. whereas in digital modulation the only difference is that the base band signal is of discrete amplitude level. the bits are represented by only two frequency levels, one for high and one for low.
Explanation: anything dealing with a network cable or the standards in use – including pins, connectors and the electric current used is dealt in the physical layer (layer 1). physical layer deals with bit to bit delivery of the data aided by the various transmission mediums.
Explanation: physical layer accepts data or information from the data link layer and converts it into hardware specific operations so as to transfer the message through physical cables. some examples of the cables used are optical fiber cables, twisted pair cables and co-axial cables.
Explanation: wireless transmission is carried out by radio waves, microwaves and ir waves. these waves range from 3 khz to above 300 ghz and are more suitable for wireless transmission. radio waves can penetrate through walls and are used in radio communications, microwaves and infrared (ir) waves cannot penetrate through walls and are used for satellite communications and device communications respectively.
Explanation: in digital communication system, signals from different frequency bands are orthogonal thus interference won’t occur.
Explanation: some of the properties of impulse function are symmetry, time scaling and shifting.
Explanation: some of the properties of fourier transform are duality property, time scaling property, time shifting property, modulation property and many more.
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