Explore topic-wise InterviewSolutions in Current Affairs.

(d) matplotlib

Line Chart:

A Line Chart or Line Graph is a type of chart which displays information as a series of data points called ‘markers’ connected by straight line segments. A Line Chart is often used to visualize a trend in data over intervals of time – a time series – thus the line is often drawn chronologically. 

Example: Line plot

import matplotlib.pyplot as plt

years= [2014,2015,2016,2017,2018] 

totaljopulations = [8939007, 8954518,8960387,8956741, 8943721]

plt.plot (years, total_populations)

plt.title (“Year vs Population in India”)

plt.xlabel (“Year”)

plt.ylabel (“Total Population”)

plt.legend( )

pit. show( )

In this program,

Plt.title( ) → specifies title to the graph

Plt.xlabel( ) → specifies label for X-axis

Plt.ylabel( ) → specifies label for Y-axis

There are many types of Visualizations under Matplotlib.

Some of them are:

1. Line plot 

2. Scatter plot 

3. Histogram 

4. Box plot 

5. Bar chart and 

6. Pie chart

In command prompt type pip — version. If it is installed already, you will get version. Python -m pip install – U pip 

C:\Users\YourName\AppData\Local\Programs\Python\ Python36-32\Scripts>pip – version 

C:\Users\YourName\AppData\Local\Programs\Python\ Python36-32\Scripts>pip list

(a) A is correct

We can install matplotlib using pip. Pip is a management software for installing python packages. After installing Matplotlib, we will begin coding by importing Matplotlib using the command: import matplotlib.pyplot as plt

Answer is Databases

The representation of information in a graphic format is called Infographics

1. Data Visualization help users to analyze and interpret the data easily.

2. It makes complex data understandable and usable.

3. Various Charts in Data Visualization helps to show relationship in the data for one or more variables.

Data Visualization

Correct answer is (a) Paid software

(d) Free and Open-source software

Organizations related to Open Source

1. Apache Software Foundation 

2. The Document Foundation

3. The Eclipse Foundation

4. Free Software Foundation

5. Linux Foundation

6. Open Course Ware Consortium

7. Open Source Initiative

Open Source Software

The advantage of the proprietary software is that it gives more control, support, training, security and stability for user making the software reliable to the users.

Answer is (b) MacOs

(c) both a and b

The goal is for Open NMS to be an actually distributed, scalable management application platform for all features of the FCAPS (Fault, configuration, accounting, performance, security) network management model. Presently the emphasis is on Fault and Performance Management.

Open-Source Software and Developers: OSS projects are collaboration opportunities that improve skills and build connections in the field.

Domains that developers can contribute to the open source community include:

1. Communication tools.

2. Distributed revision control systems.

3. Bug trackers and task lists.

4. Testing and debugging tools.

Network simulation tool – NS2:

• In computer network, network simulation is a method whereby a software program , models the activities of a network by calculating the communication between the different network objects such as(routers, nodes, switches, access points, links etc.).
• A network simulator is a software program that replicates the functioning of a computer network.
• In simulators, the computer network is typically demonstrated with devices, traffic etc. and the performance are evaluated.
• Normally, users can then adapt the simulator to accomplish their precise analysis needs. The network parameters define the state of the network (node placement, existing links) and the events (data transmissions, link failures, etc.).
• A significant output of simulation is the trace files. Trace files can document every incident that happened in the simulation and are used for examination.
• NS2 is the abbreviation of NETWORK SIMULATOR version 2. It was considered explicitly for exploration in network communication and event-driven open-source simulator in computer.
• OTCL and C++ used to create and run NS2. NS2 works on Windows and Linux platforms, that supports wired or wireless network and also use the command line interface as a user interface, API a pure event base software tool with super simulation design, it has more models which help the user to get desired output easily.

Difficult to work for beginners, Exchange of files to other software, Some time Lack of Responsibility, service and problems with hardware compatible.

Open-Source Software vs. Free Software: Although the terms are often used interchangeably, OSS is slightly different from free software. Both deal with the ability to download and modify software without restriction or charge.

However, free software a concept developed in the 1980s by an MIT computer science researcher, Richard Stallman is defined by four conditions, as outlined by the nonprofit Free Software Foundation. These “four freedoms” emphasize the ability of users to use and enjoy software as they see fit.

In contrast, the OSS criteria, which the Open Source Initiative developed a decade later, place more emphasis on the modification of software, and the consequences of altering source code, licensing, and distribution.

Obviously, the two overlap; some would say the differences between OSS and free software are more philosophical than practical. However, neither should be confused with freeware. Freeware usually refers to proprietary software that users can download at no cost, but whose source code cannot be changed.

Open NMS is the world’s first software for Network Monitor and Management with Open Source options.

Looping is repeating a set of instructions until a specific condition is met

endless loop.

(b) pay to download

(d) MIT license

(d) The round Foundation

Open NMS

• Open NMS (Network Management System)is a free and open-source initiative grade network monitoring and management platform.
• It is established and maintained by a community of users,developers and by the Open NMS Group, it offering services, training and support.
• The goal is for Open NMS to be an actually distributed, scalable management application platform for all features of the FCAPS (Fault, configuration, accounting, performance, security) network management model.
• Presently the emphasis is on Fault and Performance Management. It was intended to cope tens of thousands of devices from a single server as well as achieve unlimited devices using a cluster of servers.
• Open NMS comprises a discovery engine to routinely configure and manage network devices without operator intervention.
• It is written in Java and is issued under the GNU (General Public License.)
• Open NMS is the Worlds first software for Network monitor and management with open source options. There are two types in this Meridian and Horizon.
• When we need stability and long term support choose Meridian which is best for Enterprises as well as businesses, for Horizon used where innovation occurs frequently. It is Best for IT-ecosystem, new technologies monitoring.

Open Source Hardware:

1. Remix

2. Remake

3. Remanufacture

4. Redistribute

5. Resell

6. Study and Learn

(d) distributors

1. Software can be used without any cost and restrictions.

2. Sharing of ideas with the team.

3. User friendly.

4. We can add the most required features in the software.

5. We can learn many ideas.

6. We can make our program writing skills more efficient

7. We can use any software that suits our needs

1. Service monitoring, where a number of monitor modules can govern if network-based services (ICMP, HTTP, DNS, etc.) are accessible.

2. Data Gathering by using SNMP and JMX. 

3. Event management and notifications, which comprises of alarm reduction and a robust announcement system with accelerations and duty schedules.

Commercial programs that are made available to the public illegally are often called Warez.

Correct option is B. Part time

(b) e-learning

The natural tendency of objects to resist a change in their state of rest or of uniform motion is called inertia.

Aluminium is essential part of our life. Aluminium foil is used on inner packing of food materials and toffees. Aluminium and copper mixture is used in currency coins, medals and statues. Aluminium is used in electrical appliances, automobiles, satellites, space crafts, aeroplanes, cooking utensils, machinery, decorative materials. This indicates wherever we go we observe articles made up of aluminium. So we require aluminium for better living.

1) The process which two nuclei of light elements combine to form a heavy nucleus is called nuclear fusion. 

2) Ex : 2H₁ + 2H₁ → 3He₂ + ¹n₀ + Energy.

1) The process in which heavy nucleus of a radioactive atom splits up into smaller nuclei when bam bared with low energy neutrons is called nuclear fission.

2) Ex : ²³⁵U₉₂ + ¹n₀  \(\rightarrow\) ¹³⁹Ba₅₆  + ⁹⁴Kr₃₆ + ³¹n₀ + Energy

By decreasing the current flowing in the solenoid, the intensity of magnetic field decreases.

Correct option is C) horseshoe

When an electric charge flows in a conductor, a magnetic field is produced around it. 

: (i) By increasing current. (ii) By increasing no. of turns.

Correct option is B) Nail not magnetized

(i) Soft iron has less retentivity so it acquires the magnetic properties only when the current flows through the coil wound on it and loses the magnetic properties as the current is switched off. 

(ii) The soft iron intensifies the magnetic field of the electromagnet because of its high permeability. 

An electromagnet is a solenoid containing a soft iron core within it. It is a temporary strong magnet. It acquires the magnetic properties only when an electric current flows through the solenoid and loses the magnetic properties as the current is switched off.

 Magnitude of induced e.m.f. depends on (i) Magnitude of current. (ii) No. of turns in the coil.

(i) Since (2, 3) and (2, 7) ∈ R₁ 

⇒ R₁ (2) = 3 and R₁ (2) = 7 

So R₁ (2) does not have a unique image. Thus R₁ is not a function. 

(ii) R₂ = {(x, |x |) / x ∈R} For every x ∈ R there will be unique image as |x | ∈ R. 

Therefore R₂ is a function.

According to the question,

A = {–1, 2, 3} and B = {1, 3}

(i) A × B

{–1, 2, 3} × {1, 3}

So, A × B = {(–1, 1), (–1, 3), (2, 1), (2, 3), (3, 1), (3, 3)}

Hence, the Cartesian product = {(–1, 1), (–1, 3), (2, 1), (2, 3), (3, 1), (3, 3)}

(ii) B × A.

{1, 3} × {–1, 2, 3}

So, B × A = {(1, –1), (1, 2), (1, 3), (3, –1), (3, 2), (3, 3)}

Hence, the Cartesian product = {(1, –1), (1, 2), (1, 3), (3, –1), (3, 2), (3, 3)}

(iii) B × B

{1, 3} ×{1, 3}

So, B × B = {(1, 1), (1, 3), (3, 1), (3, 3)}

Hence, the Cartesian product = {(1, 1), (1, 3), (3, 1), (3, 3)}

(iv) A × A

{–1, 2, 3} × {–1, 2, 3}

So, A × A = {(–1, –1), (–1, 2), (–1, 3), (2, –1), (2, 2), (2, 3), (3, –1), (3, 2), (3, 3)}

Hence, the Cartesian product ={(–1, –1), (–1, 2), (–1, 3), (2, –1), (2, 2), (2, 3), (3, –1), (3, 2), (3, 3)}

difference between a commercial bank and a central bank.