Full Test 5 - EKT CSE - AFCAT MCQ

When J=1 and K=1 then the race condition is occurs that means both output wants to be HIGH, it is called toggling.

ASCII stands for American Standard Code for Information Interchange is a character encoding standard for electronic communication. ASCII characters are represented by seven bits. ASCII codes are of two types- ASCII-7 and ASCII-8. ​The standard ASCII character has 7 bits and the basic set ranges from 0 to 127.​The extended ASCII character has 8 bits and the basic set ranges from 0 to 255.

Optical fibre works on the principle of total internal reflection. Here light is used to transmit information from one place to another.

In circuit switching entire channel capacity is used for single communication.

Two types of switched services are used in Wide Area Network:

(1). Circuit Switching: In circuit switching, a dedicated channel, called circuit, is set up between two stations for the duration of the transmission.The circuit must be established to make a complete end-to-end  connection before any data transmission.The whole bandwidth is dedicated to to this connection even if no data is being transferred.

(2). Packet Switching: In packet switching there is no dedicated circuit between any two end nodes, links can be dynamically shared among several communications over time. To provide the link sharing, user data must be segmented into discrete, variable length units called packets.

RAM(Random access memory) is volatile while ROM(Read only memory), PROM(programmable read only memory) and EPROM(Erasable programmable read only memory) are non-volatile memories means their data will be retained even when the power is turned off.

The charge carriers in an n-channel FET are electrons alone

Bridge works at data link layer, it transmits frames from one LAN to another.

Tesla (T) is a measure of magnetic flux density.
Electrical potential measures in volts (V).
Magnetic potential measures in Amperes (A).

If both inputs of JK flip flop are same, then it acts as T flip flop. If both the inputs are low, then the output will be same as the previous output. If both the inputs are high, then the output will be complement of the previous output.

Twisted-pair wire has slowest transmission speed while fibre-optic cable has highest transmission speed.

The below truth table is for OR gate.

From the above truth table we can say that if one of the input is high, the output will be high.
The below truth table is for AND gate.

From the above truth table we can say that if one of the input is low, the output will be high.

Converting in decimal we have

61 = 63-2, as 63 is represented by 111111, subtracting 2 will give 111101.

A full adder can be realized by using two half adders and one OR gate.

Let the side of the square is x
Now, the area of square is, A = x²
Given that area of the square increased by 69%, the area will be 1.69 A
Let the increased side of the square is nx
⇒ (nx)² = 1.69x²
⇒ n = 1.3

A multiplexer has many inputs and one output and selection lines.

A network that has only one entry and exit point is called stub network.

When it is interrupted by a scheduler which is possible when its time quanta is complete.

Total balls in the bag are = 15
Sample space = 15c₃
The probability that all the balls are red is 

In order to schedule processes fairly, a round-robin scheduler generally employs time-sharing, giving each job a time slot or quantum (its allowance of CPU time), and interrupting the job if it is not completed by then. It is designed especially for time-sharing systems.

In the OSI model of computer networking, a frame is the protocol data unit at the data link layer. Frames are the result of the final layer of encapsulation before the data is transmitted over the physical layer. A frame is the unit of transmission in a link layer protocol, and consists of a link layer header followed by a packet.

Long term scheduler is also called job scheduler. Long term scheduler determines which programs are admitted to the system for processing. Job scheduler selects processes from the process queue and loads them into memory for execution (new to ready state). The primary objective of the job scheduler is to provide a balanced mix of jobs, such as I/O bound and processor bound. It also controls the degree of multiprogramming. If the degree of multiprogramming is stable, then the average rate of process creation must be equal to the average departure rate of processes leaving the system.

In an AC circuit, resonance occurs when capacitive reactance equals reactive reactance.

At resonance, X_L = X_C, Z = R

Banker’s algorithm is a Deadlock avoidance algorithm, it doesn’t detect or prevent deadlock, it acquires prior knowledge of all the currently executing processes, so that it can help to avoid deadlock.

The current at a point in the circuit is the amount of charge that passes that point in one second. A current of 1 A is flowing in a circuit if a charge of 1 coulomb passes any point in the circuit every second.

Multiplying matrix A by itself, we get 

As weak entity can be identified by using partial key + key of owner entity, the relationship set needs to be total participation.

An Embedded system is typically the part of some big electrical or mechanical system which are working in real time, so it must be running on a real-time OS.

When x is 45 degrees sinx + cosx attains maxima.

A file system is said to exhibit data dependence when any of the file’s data characteristics change, all data access programs are subject to change.