Questions

Q:

 Which isolation level does a database without logging default to?

A) committed read B) dirty read
C) mode ANSI D) repeatable read
 
Answer & Explanation Answer: B) dirty read

Explanation:
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Q:

In which body cavities are the lungs located

A) Pelvic cavity B) Thoracic cavity
C) Abdominal cavity D) Body cavity
 
Answer & Explanation Answer: B) Thoracic cavity

Explanation:
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Q:

The main excretory organs of insects and spiders are

A) Malphigian tubues B) Maxillary glands
C) Coxal glands D) Antennal glands
 
Answer & Explanation Answer: A) Malphigian tubues

Explanation:

The main excretory organs of insects and spiders are Malpighian tubules.

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Q:

What is Memory-Management Unit (MMU)?

Answer

Hardware device that maps virtual to physical address. In MMU scheme, the value in the relocation register is added to every address generated by a user process at the time it is sent to memory.


->The user program deals with logical addresses; it never sees the real physical addresses

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Q:

Give the truth table for a Half Adder. Give a gate level Implementation of the same.

Answer

TRUTH TABLE FOR HALF ADDER


A    B  SUM  CARRY


0    0    0         0


0    1    1         0


1    0    1         0


1    1    0         1


INPLEMENTATION:


For SUM, The two inputs A and B are given to XOR gate.


For Carry, The two inputs A and B are given to AND gate.

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Q:

The amount of water vapor in the air is called

A) Saturated air B) Precipitation
C) Humidity D) Capacity
 
Answer & Explanation Answer: C) Humidity

Explanation:

The amount of water vapor in the air is called Humidity. The amount of water vapor that air acn hold depends on the temperature of the air. The amount of water vapor in the air as compared with the amount of water that the air could hold is called Relative humidity.

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Q:

The process of copying dna is called

A) Copying B) Replication
C) Repulsion D) Replying
 
Answer & Explanation Answer: B) Replication

Explanation:

The process of copying dna is called Replication.

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Q:

Which statement best describes the electronegativity of an element?

A) Electronegativity of an atom is it's ability to produce energy while losing an electron. B) Electronegativity of an atom is it's ability to attract electrons during bond formation.
C) Electronegativity of an atom is it's ability to lose electrons during cation formation. D) Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.
 
Answer & Explanation Answer: B) Electronegativity of an atom is it's ability to attract electrons during bond formation.

Explanation:

Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.

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