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Q:

Why does'nt the hydrogen atom emit X-rays?

A) It is very small in size	B) It has only one electron
C) Its energy levels are very close to each other	D) it is highly electropositive

Answer & Explanation Answer: C) Its energy levels are very close to each other

Explanation:

For an atom to emit X-rays it should have difference in energy levels

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Filed Under: Physics

Q:

What is the capital of Korea,North?

A) Pyongyang	B) Tokyo
C) Bissau	D) none

Answer & Explanation Answer: A) Pyongyang

Explanation:

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Filed Under: Country Capitals

Q:

Which king class properly represents the relationship "King has a best friend who is a Soldier"?

A) class King extends Soldier { }	B) class King implements Soldier { }
C) class King { private BestFriend Soldier; }	D) class King { private Soldier bestFriend; }

Answer & Explanation Answer: D) class King { private Soldier bestFriend; }

Explanation:

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Filed Under: Java

Q:

A UNIX user named Bob wants to replace his chess program with a new one, but he is not sure where the old one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using the command: java -classpath /test:/home/bob/downloads/*.jar games.Chess Bob's CLASSPATH is set (at login time) to: /usr/lib:/home/bob/classes:/opt/java/lib:/opt/java/lib/*.jar What is a possible location for the Chess.class file?

A) /test/Chess.class	B) /home/bob/Chess.class
C) /test/games/Chess.class	D) /user/lib/games/Chess.class

Answer & Explanation Answer: D) /user/lib/games/Chess.class

Explanation:

/user/lib/games/Chess.class could be the possible location of the file

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Filed Under: Operating Systems

Q:

What is the structure of IF7 ?

A) Triagonal bipyramid	B) Pentagonal bipyramid
C) Square pyramid	D) tetrahedral

Answer & Explanation Answer: B) Pentagonal bipyramid

Explanation:

In IF7 out of 7 Flourine atoms 5 of them are placed on a plane in Pentagon shape .In remaining 2 flourines one is placed above the plane and other below the plane each at 90 degrees

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Filed Under: Chemistry

Q:

Atomic weight of an element is given by

A) sum of neutrons and electrons	B) sum of neutrons and protons
C) only neutrons	D) only protons

Answer & Explanation Answer: A) sum of neutrons and electrons

Explanation:

Atomic weight=number of neutrons+number of protons

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Filed Under: Chemistry

Q:

Which among the following is the most electronegative element?

A) Flourine	B) Bromine
C) Iodine	D) Oxygen

Answer & Explanation Answer: A) Flourine

Explanation:

Flourine is the most electro negative element due to its small atomic radius .It also has the tendency to accept an electron to complete octet configuration

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Filed Under: Chemistry

Q:

What is the capital of Philippines?

A) Warsaw	B) Manila
C) Lisbon	D) Doha

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