Q:

Sound waves can not travel through a

A) copper wire placed in air	B) silver slab placed in air
C) glass prism placed in water	D) wooden hollow pipe placed in vacuum

Answer & Explanation Answer: D) wooden hollow pipe placed in vacuum

Explanation:

Sound is a kind of energy created when something vibrates. When this vibration reaches an ear, it is translated into what we recognize as a sound. Sound vibration must travel through matter. Therefore, it can travel through air and water but not through vacuum.

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Filed Under: Physics
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Q:

You can use the tab key to ________

A) move a cursor across the screen	B) indent a paragraph
C) move the cursor down the screen	D) both (a) and (b)

Answer & Explanation Answer: D) both (a) and (b)

Explanation:

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Q:

What happens when you boot up a PC?

A) Portions of the operating system are copied from disk into memory	B) Portions of the operating system are copied from memory onto disk
C) Portions of the operating system are compiled	D) Portions of the operating system are emulated

Answer & Explanation Answer: A) Portions of the operating system are copied from disk into memory

Explanation:

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Q:

Where is second World health Expo being held?

A) Wuhan, China	B) New York, USA
C) Paris, France	D) Geneva, Switzerland

Answer & Explanation Answer: A) Wuhan, China

Explanation:

The World Health Expo will showcase the latest technology in fitness sports and the most realistically restored anti-epidemic scenes.

Both 1st and 2nd World Health Expo held at Wuhan, China.

1st on April 7 - 10, 2019

2nd on November 11 - 14, 2020

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Filed Under: General Awareness
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Q:

Pashmina shawl is made from the hair of

A) Sheep	B) Goat
C) Rabbit	D) Yak

Answer & Explanation Answer: B) Goat

Explanation:

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Filed Under: Animals and Birds

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Q:

The _____ controls communications for the entire computer system

A) arithmetic-logic unit	B) semiconductor
C) motherboard	D) coprocessor

Answer & Explanation Answer: C) motherboard

Explanation:

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Q:

Improve the bracketed part of the sentence.

The (needs) of the hour was to reform the entire banking system.

A) need	B) needing
C) needings	D) no improvement

Answer & Explanation Answer: A) need

Explanation:

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Q:

What resources are used when a thread is created? How do they differ from those when a process is created?

Answer

When a thread is created the threads does not require any new resources to execute the thread shares the resources like memory of the process to which they belong to. The benefit of code sharing is that it allows an application to have several different threads of activity all within the same address space. Whereas if a new process creation is very heavyweight because it always requires new address space to be created and even if they share the memory then the inter process communication is expensive when compared to the communication between the threads.

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