Question Discussion & Solution

The correct answer is ​Ahar.

• Ahar civilization:
  • Ancient name
    • Tamravati Nagari
    • Aghatpur
    • Aghat Pur
  • Upnaam
    • Banas culture
    • Mounds of the dead

Key Points

• Ahar civilization-
  • It is situated in Udaipur.
  • It was excavated by-
    • Akshay Kirti Vyas in 1953 AD.
    • Ratan Chand Agrawal in 1956 AD.
    • Dheeraj Lal Sankaliya in 1961 AD.
  • It was known as Tamravati / Aghatpur / Dhulkot in ancient times.
  • It is also known as mounds of dead.
  • Ahar's houses were built with soft black stone and raw briquette.
  • One/ two/ six stoves were also found in Ahar's houses.
  • Red black ware also found there.
  • It was a copper-age civilization.
  • Agriculture and animal rearing were also done by Aharvasi.
  • Soil-made ox statue was also found there, which is known as the Banasiyal bull.

Additional Information

• Bairath civilization-
  • It is situated in Shahpura, Jaipur.
  • It is also known as Virat Nagar.
  • It is situated on the bank of the Banganga river.
  • It was firstly searched by Rai Bahadur Dayaram Sahani in 1936 AD.
  • Its survey and excavation were done by Kailash Dixit and Neel Ratna Banarjee. 
• Bagore civilization- 
  • It is situated in Bhilwara on the bank of the Kothari river.
  • It was excavated by Dr. V.N. Misra and Dr. L.S. Laishnik.
  • It has evidence of the most ancient animal rearing of India.
  • It is also known as the museum of primitive culture.
  • Swastik sign was used there for Vastu dosh prevention.
• Kalibanga civilization-
  • It was excavated by Amlanand Ghosh (firstly) in 1952 AD.
  • It was also excavated by Brijvasi Lal and Balkrishna Thapar in 1961-69 AD.
  • It is situated on the bank of the Ghaggar river.

CONCEPT:

Logic Gates:

• The logic gates are used in electronic circuits that give a certain output for a given set of Inputs.
• and which is based on a certain logic. 
• Input and output are in binary form that is 1 and 0.
• It is based on certain Logic.
• Some basic logic gates are AND gate, OR gate, NOT gate. 
• To build digital logic we develop a combination of these gates. 

AND Gate

•  If both the inputs are high, it produces a high output.
• The Boolean algebra for AND gate is X = A. B
• It means that if any of the input of A and B is zero, the output will be zero.
• If both are one, the output will be one.

The correct option is AND Gate. 

Additional Information

NOT gate:  

• It inverts the input. Whatever the input is given, it changes its value at the output.
• The Boolean algebra for NOT gate is X = X̅

The correct answer is option 1.

Concept:

When a process requests for the resource that is been held another process that needs another resource to continue, but is been held by the first process, then it is called a deadlock.

There are 4 conditions necessary for the occurrence of a deadlock.

Mutual Exclusion:

Only one process can hold a resource at a time. In other words, if a process P1 is utilizing a resource R at a specific moment in time, another process P2 cannot hold or utilize the same resource R at that same moment. Process P2 can make a request for that resource R, but it cannot use it at the same time as process P1.

Hold and Wait:

A process can hold several resources at the same time while also requesting resources from another process. A process P1, for example, can have two resources R1 and R2 while also requesting a resource R3 that is currently owned by process P2.

No preemption:

A resource cannot be forcibly removed from a process by another process. If a process P1 is using a resource R, for example, another process P2 cannot take that resource by force. If that's the case, what's the point of using different scheduling algorithms?  Process P2 can make a request for the resource R and then wait for process P1 to liberate it.

Circular Wait:

The first process is waiting for the resource held by the second process, and the second process is waiting for the resource held by the third process, and so on. Finally, the last process is waiting for the first process's resource. As a result, each process is waiting for the other to release the resource, with no one releasing their own. Everyone is waiting for the resource to arrive. This is referred to as a circular wait.

Hence the correct answer is Mutual Exclusion, Hold and Wait, No Preemption, and Circular Wait.

(E_Name, Salary_in_Lakhs) is the key

(E_Name, Salary_in_Lakhs) → {E_ID, E_Age, E_mail}

E_Name: Nitesh is repeated

Check only for Nitesh

(Nitesh, 9) → (XE005, 24, nitestSE@123)

(Nitesh, R) → (XE023, 24, nitestCE@123)

Since right hand side is not same

Therefore, R cannot be equal to 9

The correct answer is option 4, i.e. ZIP.

Additional Information