Question Discussion & Solution

The correct answer is Ammeter. 

Key Points

• An ammeter is the instrument used to measures the electric current in a circuit.
• Electricity is the flow of free electrons.
• Unit of Current - Ampere.
• Father of  Electricity - Michael Faraday. 

Additional Information

Ohmmeter

• The instrument used to measure the electrical resistance.
• Electrical resistance opposes the flow of electric current in a circuit.
• Unit of Resistance - Ohm
• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
• V=IR, where (R) Resistance is the proportionality constant.

Thermometer

• An instrument used to measure the temperature.
• The first Mercury Thermometer was invented by Gabriel Fahrenheit.

​Gyroscope

• The instrument used to measure or maintaining the orientation of angular velocity.
• Gyroscope was invented by Leon Foucault.

Binary semaphores are also known as Mutex locks, as they are locks that provide mutual exclusion.

Explanation:-

Binary semaphores:- This is also known as mutex lock. It can have only two values 0 and 1. Its value is initialized to 1. It is used to implement the solution of critical section problems with multiple processes.

 Important PointsCounting semaphores:- Its value can range over an unrestricted domain. It is used to control access to a resource that has multiple instances

Using mutex:- A mutex provides mutual exclusion, either producer or consumer can have the key (mutex) and proceed with their work. 

Shared variable:- A semaphore is a shared variable that is used to implement mutual exclusion between system processes.
 Additional InformationSemaphore used:- Semaphores are typically used in one of two ways: To control access to a shared device between task. A Printer is a good example. You don'twant 2 tasks sent to the printer at once, so you create a binary semaphore to control printer access.

The correct answer is 1 i.e. propanal.

Concept:

IUPAC nomenclature:

• A systematic method of naming organic compounds.
• Naming is based on their structures.
• It is devised by the International Union of Pure and Applied chemistry.
• Many rules are followed while naming the compounds and it is different for different functional groups.
• The rules are known as IUPAC rules.

Explanation:

• This compound contains 3 carbon atoms, so its parent alkane is propane.
• It also contains an aldehyde group (-CHO-) group which is indicated by using 'al' as suffix or ending.
• So by replacing the last 'e' of butane with 'al', the name becomes propanal.
• Thus, the IUPAC name of the compound CH3CH2CHO is propanal.
• The common name of propanal is Propionaldehyde.

​Additional Information

• The chart for priority order and suffix name is given below:

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 Mr Sachin Pilot.

• As of June 2020, Mr. Sachin Pilot is the Minister of Science and Technology, Panchayati Raj of Rajasthan.

Key Points

• Mr. Sachin Pilot s the Minister of Science and Technology, Panchayati Raj of Rajasthan.
• He is also the current Deputy Chief Minister of Rajasthan.
• His constituency is Ajmer, Rajasthan.
• He is associated with Indian National Congress.

Additional Information

• Mr. Ashok Gehlot is the current Chief Minister of Rajasthan in the Government of Rajasthan.
• Mr. Bulaki Das Kalla is the Minister of Energy, Public Health & Engineering, Ground Water, Art, Literature, Culture & Archeology in the Government of Rajasthan.
• Master Bhanwarlal Meghwal is the Minister of Social Justice and Empowerment in the Government of Rajasthan.