Q:

Which of the following is Not an Operating System?

A) UNIX	B) Windows NT
C) C++	D) DOS

Answer & Explanation Answer: C) C++

Explanation:

C++ is not an Operating System.

An Operating System is a collection of system programs that manages all the other programs application programs in a computer as well as the allocation and use of hardware resources such as the CPU, Memory and the Hard Disk Drive.

It acts as an interface between the hardware and the user level program.

It controls and facilitates the overall operation of a computer.

Here

UNIX : UNIX is a popular multi-user, multitasking operating system (OS) developed at Bell Labs.

Windows NT : Windows NT is a family of operating systems produced by Microsoft, the first version of which was released in July 1993.

DOS : DOS is Disk Operating System. The term DOS can refer to any operating system.

C++ : C++ is a programming language and computing platform.

Hence, C++ is not an Operating System.

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Filed Under: Operating Systems
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Q:

Trichloroacetaldehyde was subject to Cannizzaro's reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

A) Chloroform	B) 2, 2, 2-Trichloroethanol
C) Trichloromethanol	D) 2, 2, 2-Trichloropropanol

Answer & Explanation Answer: B) 2, 2, 2-Trichloroethanol

Explanation:

$\begin{matrix} C l \\ | \\ C l & - & C & - & C H O \\ | \\ C l \end{matrix}$ $\to_{C a n n i z z a r o' s R e a c t i o n}^{N a O H}$ $\begin{matrix} C l \\ | \\ C l & - & C & - & C O O N a \\ | \\ C l \end{matrix}$ $+$ $\begin{matrix} C l \\ | \\ C l & - & C & - & C H_{2} \\ | 2 & 1 \\ C l \end{matrix}$ $- O H$

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Filed Under: Chemistry
Exam Prep: AIEEE

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Q:

If an empty cylinder is half filled with a liquid, its center of gravity is

A) shifted upwards	B) shifted downwards
C) shifed neither upward nor downward	D) shifted upward or downward depending on the density of the liquid

Answer & Explanation Answer: B) shifted downwards

Explanation:

Effect of adding liquid is to make the cylinder more bottom heavy which is a more stable position

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Filed Under: Physics

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Q:

Rearrange the parts of the sentence in correct order

Due to poor organic matter

P-in soil is below the required
Q-incorporation, organic carbon
R-level in most parts of India

A) RPQ	B) QRP
C) QPR	D) PRQ

Answer & Explanation Answer: C) QPR

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

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Q:

__________ networks are connected by telephones, underwater cables and satellites.

A) Typewriter	B) DVD
C) Computers	D) Washing Machine

Answer & Explanation Answer: C) Computers

Explanation:

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Filed Under: Computer
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Q:

Any letter, number, or symbol found on the keyboard that you can type into the computer...........

A) Output	B) Type
C) Character	D) Print

Answer & Explanation Answer: C) Character

Explanation:

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Filed Under: Computer

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Q:

Which instrument has keys, pedals and strings?

A) Guitar	B) Piano
C) Violin	D) Tumbra

Answer & Explanation Answer: B) Piano

Explanation:

A piano is a musical instrument which has keys, pedals and strings in which the strings are struck by hammers.

which_instrument_has_keys_pedals_and_strings1558331311.jpg image

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Filed Under: General Awareness
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Q:

The National institute of Oceangraphy is located at

A) Goa	B) Mumbai
C) Cochin	D) Kandla

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