Questions

Q:

Candidate Key in DBMS?

Answer

A candidate key is a column, or set of columns, in a table that can uniquely identify any database record without referring to any other data. Each table may have one or more candidate keys, but one candidate key is unique, and it is called the primary key.

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Q:

The study of economics is primarily concerned with

A) choices that are made in seeking to use scarce resources efficiently B) keeping private businesses from losing money
C) demonstrating that capitalistic economies are superior to socialistic economies D) None of the above
 
Answer & Explanation Answer: A) choices that are made in seeking to use scarce resources efficiently

Explanation:
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Filed Under: Indian Economy
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Q:

The substances which reduce friction are called _________.

A) irregularities B) lubricants
C) adhesives D) viscous
 
Answer & Explanation Answer: B) lubricants

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

There were 42 students in a hostel. Due to the admission of 13 new students, the expenses of the mess increase by Rs. 30 per day while the average expenditure per head diminished by Rs. 3. What was the original expenditure of the mess ?

A) Rs. 630 B) Rs. 580
C) Rs. 470 D) Rs. 690
 
Answer & Explanation Answer: A) Rs. 630

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Q:

Cold foods should be kept at a temperature of

A) < 5 deg Celcius B) > 18 deg Celcius
C) > 41 deg Celcius D) < -18 deg Celcius
 
Answer & Explanation Answer: A) < 5 deg Celcius

Explanation:

To reduce the risk of bacterial contamination, many foods must be stored in the refrigerator and thus kept below 5 degrees Celsius. These foods are often classified as ‘high-risk foods’ and include – meat, poultry, dairy, seafood, eggs, smallgoods and cooked rice and pasta. This also refers to ready-to-eat foods that have high-risk foods as ingredients and include – casseroles, quiche, pasta salad, pizza, sandwiches and many cakes.

 

By keeping these high-risk foods under 5 degrees Celsius it stops them from entering the ‘danger-zone’ – temperatures between 5 degrees Celsius and 60 degrees Celsius. The danger-zone is the temperature zone which provides bacteria with the perfect environment to rapidly grow and multiply to numbers that cause food poisoning.

 

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Filed Under: General Science
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Q:

Which among the following is not a dwarf planet?

A) Mars B) Makemake
C) Pluto D) Eris
 
Answer & Explanation Answer: A) Mars

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Filed Under: General Science
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Q:

In which year a new “Liberalized Industrial Policy” in India was announced for the first time?

A) 1991 B) 1992
C) 1986 D) 1993
 
Answer & Explanation Answer: A) 1991

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Filed Under: Indian History
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Q:

Who invented ECG?

A) Hans Berger B) Einthoven
C) G. Bist D) None of the above
 
Answer & Explanation Answer: B) Einthoven

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Filed Under: Inventions
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