Questions

Q:

What is Primary Key in DBMS?

Answer

A primary key is a special relational database table column or combination of columns designated to uniquely identify all table records. That is, A primary key is a column or set of columns in a table that uniquely identifies tuples (rows) in that table.


A primary key, also called a Primary Keyword.



Main Features Primary key are ::


It must contain a unique value for each row of data.


It cannot contain null values.

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Q:

Cybercards are most useful for

A) writing to-do lists B) creating new inventions
C) keeping a personal diary D) tracking Internet-based research
 
Answer & Explanation Answer: D) tracking Internet-based research

Explanation:
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Q:

Which country is the largest producer of sugarcane in the world?

A) Brazil B) Russia
C) China D) India
 
Answer & Explanation Answer: A) Brazil

Explanation:

The country Brazil is the largest producer of sugarcane in the world.

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Q:

Earth is known as Blue planet?

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

We know that, 


Earth is known as Watery planet.


Neptune is known as Blue planet. 

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Q:

Who has become the first ever Indian shuttler to enter a badminton final at the Asian Games?

A) Saina Nehwal B) PV Sindhu
C) Hima Das D) None of the above
 
Answer & Explanation Answer: B) PV Sindhu

Explanation:
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Q:

Which process occurs inside the chloroplasts?

A) Photosynthesis B) Glycolysis
C) Oxidation D) None of the above
 
Answer & Explanation Answer: A) Photosynthesis

Explanation:

The process that occurs inside the chloroplasts is photosynthesis. The light from the sun is obserbed and combining with water and CO2, plants prepare food for the plants.

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Q:

The Indian-Australian mathematician who is one of four winners of mathematics prestigious Fields medal, known as the Nobel Prize for math was

A) Akshay Venkatesh B) Manoj prabhakar
C) N.K Surna D) None of the above
 
Answer & Explanation Answer: A) Akshay Venkatesh

Explanation:

Akshay Venkatesh, a renowned Indian-Australian mathematician, is one of four winners of mathematics’ prestigious Fields medal, known as the Nobel prize for math. New Delhi-born Venkatesh, 36, who is currently teaching at Stanford University, has won the Fields Medal for his profound contributions to an exceptionally broad range of subjects in mathematics.

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Q:

Which statement about ultrabook computers is false?

A) Ultrabooks typically weigh less than 3 pounds B) Ultrabooks have the fastest optical drives
C) Ultrabooks do not offer HDMI video output ports D) Utrabooks are equipped with SSD drives for fast start-up
 
Answer & Explanation Answer: B) Ultrabooks have the fastest optical drives

Explanation:

Ultrabooks have the fastest optical drives is the only false statement regarding ultrabooks.

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