Which of the following statement is true?
A primary key is also a candidate key
Each relation has at least one foreign key
Foreign keys can't have null values
Foreign keys can't have null values
A.
A primary key is also a candidate key
Which of the following is used as non-stick coating for cooking utensils?
Perspex
Styrofoam
Polystyrene
Polystyrene
Tsunami is the name given to which of the following?
Earthquake
Cyclone
Tidal Waves
Tidal Waves
The first Indian citizen to get commercial Pilot's Licence was
Vijaypat Singhania
J.R.D. Tata
Captain Gopinath
Captain Gopinath
Which of the following is/are 'rain cloud'?
1. Cirrus 2. Nimbostratus
3. Cumulonimbus 4. Altocumulus
1 and 2
2 and 3
3 and 4
3 and 4
According to the Indian Constitution, who has the power to declare emergency?
Prime Minister
President
Chief Justice
Chief Justice
Particulates ( 1μ mg ) remaining suspended in air indefinitely and transported by wind currents are called
Mists
Fumes
Aerosols
Smoke
The least preferred technique in the disposal of Municipal Solid Waste is
Incineration
Composting
Land filling
Land filling
A bomb explodes on the moon. You will hear its sound on earth after ........
20 min
2 hours 20 min
3.7 hours
3.7 hours
Which one of the following takes place during a nuclear fusion?
A heavy nucleus bombarded by neutrons breaks up
A heavy nucleus breaks up spontaneously
Two light nuclei combine to form a heavy nucleus
Two light nuclei combine to form a heavy nucleus