Question Discussion & Solution

Given:

The only one figure that satisfies the given pattern is: 

Hence, A is the correct answer.

Key Points

txtFirst + Last Name:

False, the + symbol is an illegal character for control names.

The remaining all are acceptable control in visual basic.

Hence the correct answer is btnCalc, txtAge, lblDistance.

OSI Model

• OSI stands for Open System Interconnection is a reference model that describes how information from a software application in one computer moves through a physical medium to the software application in another computer.
• OSI consists of seven layers, and each layer performs a particular network function.
• OSI model was developed by the International Organization for Standardization (ISO) in 1984, and it is now considered as an architectural model for inter-computer communications.

There are seven OSI layers. Each layer has different functions. A list of seven layers are given below:

1) Physical Layer: 

• The main functionality of the physical layer is to transmit the individual bits from one node to another node.
• It is the lowest layer of the OSI model.

2) Data-Link Layer: 

• This layer is responsible for the error-free transfer of data frames.
• It defines the format of the data on the network.
• It provides reliable and efficient communication between two or more devices.

3) Network Layer: 

• It is a layer 3 that manages device addressing, tracks the location of devices on the network.
• It determines the best path to move data from source to destination based on the network conditions, the priority of service, and other factors.
• Logical Addressing and Routing are functions of the Network Layer.

4) Transport Layer: 

• The Transport layer is a Layer 4 ensures that messages are transmitted in the order in which they are sent and there is no duplication of data.
• The main responsibility of the transport layer is to transfer the data completely.

5) Session Layer:

• The Session layer is used to establish, maintain, and synchronizes the interaction between communicating devices.

​6) Presentation Layer:

• It acts as a data translator for a network.
• This layer is a part of the operating system that converts the data from one presentation format to another format.

7) Application Layer: 

• An application layer serves as a window for users and application processes to access network service.
• This layer provides network services to the end-users.
• HTTP is an application layer protocol designed within the framework of the Internet protocol suite. Its definition presumes an underlying and reliable transport layer protocol, and Transmission Control Protocol (TCP) is commonly used.

​Thus, HTTP is an application layer in the OSI Model of Networking.

The correct answer is in 1957.

• Rajasthan State Sports Council was established in 1957.

Key Points

• Rajasthan State Sports Council is the premier body in Rajasthan at the State level which looks after the development of sports activities and providing coaching to the state players.
• It was set up in the year 1957.
• Its headquarters is in Jaipur, Rajasthan.
• Ashok Chandna is the current sports minister of Rajasthan.

Water Pollution:

• Water pollution occurs when harmful substances often chemicals or microorganisms contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
• Water pollution is a major environmental issue in India.
• The largest source of water pollution in India is untreated sewage.
• Other sources of pollution include agricultural runoff and unregulated small-scale industry.
• Most rivers, lakes, and surface water in India are polluted due to industries, untreated sewage, and solid wastes.

Hence, option 1 is the correct answer. 

​

​Untreated Sewage

• A 2007 study found that the discharge of untreated sewage is the single most important source of pollution of surface and groundwater in India.
• There is a large gap between the generation and treatment of domestic wastewater in India.
• The problem is not only that India lacks sufficient treatment capacity but also that the sewage treatment plants that exist do not operate and are not maintained.

1. Agriculture run-off: Farms discharge large quantities of agrochemicals, organic matter, drug residues, sediments, and saline drainage into water bodies. Nevertheless, agricultural pollution, aggravated by increased sediment runoff and groundwater salinization, is also becoming an issue.
2. Unregulated small-scale industries and religious practices comparatively have less contribution to water pollution in major rivers of India.