Questions

Q:

A computer consists of

A) motherboard B) hard disk drive
C) central processing unit D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A computer system consists of a computer case, a power supply unit, a motherboard, a central processing unit (CPU), main memory, and a hard disk drive.

Input devices include a keyboard, mouse, microphone, video camera, and image scanner.

Output devices include a monitor, speakers, and a printer.

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Q:

main()

{

char *p; p = "Hello";

printf ("%cn", *&*p);

}

A) H B) Hello
C) Compilation error D) H E L L O
 
Answer & Explanation Answer: A) H

Explanation:

* is a dereference operator & is a reference operator. They can be applied any number of times provided it is meaningful. Here p points to the first character in the string "Hello". *p dereferences it and so its value is H. Again & references it to an address and * dereferences it to the value H

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Q:

As an object falls freely its ___________________.

 

A) kinetic energy gets converted into potential energy B) potential energy gets converted into kinetic energy
C) momentum gets converted into gravitational force D) gravitational force gets converted into momentum
 
Answer & Explanation Answer: B) potential energy gets converted into kinetic energy

Explanation:
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Q:

Biological catalysts are protein molecules which

1. speed up a chemical reaction

2. remain unchanged after reaction

3. function optimally at 37 deg C.

4. do not have an enzymatic activity

Select the correct answer using the code given below.

A) 1 only B) 1, 2 and 3
C) 2 and 3 only D) 1, 3 and 4
 
Answer & Explanation Answer: B) 1, 2 and 3

Explanation:

Enzymes are biological catalysts. Enzymes are the catalysts involved in biological chemical reactions.

A fundamental task of proteins is to act as enzymes—catalysts that increase the rate of virtually all the chemical reactions within cells.

A catalyst remains chemically unchanged itself at the end of a reaction.

Each enzyme has a temperature that it works optimally in, which in humans is around 98.6 degrees Fahrenheit, 37 degrees Celsius –the normal body temperature for humans.

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Q:

The computer's processor consists of the following parts

A) CPU and Main Memory B) Hard Disk and Floppy Drive
C) Control Unit and ALU D) Operating System and Application
 
Answer & Explanation Answer: C) Control Unit and ALU

Explanation:
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Q:

Animal without red blood cells

A) Frog B) Earthworm
C) Snake D) Peacock
 
Answer & Explanation Answer: B) Earthworm

Explanation:
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Q:

Which one of the following dynasties was ruling over North India at the time of Alexander's invasion

A) Nanda B) Maurya
C) Sunga D) Kanva
 
Answer & Explanation Answer: A) Nanda

Explanation:
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Q:

Arrange the continents from largest to smallest?

A) Africa
B) Europe
C) North America
D) Asia
E) Australia
F) South America
G) Antarctica

A) D,A,C,F,G,B,E B) A,C,B,F,E,D,G
C) D,B,F,C,G,A,E D) E,A,C,D,G,F,B
 
Answer & Explanation Answer: A) D,A,C,F,G,B,E

Explanation:
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