Questions

Q:

What two scientists established the structure of dna?

A) Rosalind Franklin and Maurice Wilkins B) James Watson and Francis Crick
C) Rosalind Franklin and Francis Crick D) James Watson and Maurice Wilkins
 
Answer & Explanation Answer: B) James Watson and Francis Crick

Explanation:

In the early 1950s two scientists, Rosalind Franklin and Maurice Wilkins, studied DNA using x-rays. Franklin produced an x-ray photograph that allowed two other researchers, James Watson and Francis Crick to work out the 3D structure of DNA. The structure of DNA was found to be a double helix.

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Q:

What is multi tasking, multi programming, multi threading?

Answer

Multi programming: Multiprogramming is the technique of running several programs at a time using timesharing. It allows a computer to do several things at the same time. Multiprogramming creates logical parallelism. The concept of multiprogramming is that the operating system keeps several jobs in memory simultaneously. The operating system selects a job from the job pool and starts executing a job, when that job needs to wait for any i/o operations the CPU is switched to another job. So the main idea here is that the CPU is never idle. 


Multi tasking: Multitasking is the logical extension of multiprogramming .The concept of multitasking is quite similar to multiprogramming but difference is that the switching between jobs occurs so frequently that the users can interact with each program while it is running. This concept is also known as time-sharing systems. A time-shared operating system uses CPU scheduling and multiprogramming to provide each user with a small portion of time-shared system. 


Multi threading: An application typically is implemented as a separate process with several threads of control. In some situations a single application may be required to perform several similar tasks for example a web server accepts client requests for web pages, images, sound, and so forth. A busy web server may have several of clients concurrently accessing it. If the web server ran as a traditional single-threaded process, it would be able to service only one client at a time. The amount of time that a client might have to wait for its request to be serviced could be enormous. So it is efficient to have one process that contains multiple threads to serve the same purpose. This approach would multithread the web-server process, the server would create a separate thread that would listen for client requests when a request was made rather than creating another process it would create another thread to service the request. To get the advantages like responsiveness, Resource sharing economy and utilization of multiprocessor architectures multithreading concept can be used.

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Q:

The deepest oceanic trench Mariana is located in ______

A) Atlantic Ocean B) Arctic Ocean
C) Pacific Ocean D) Indian Ocean
 
Answer & Explanation Answer: C) Pacific Ocean

Explanation:
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Q:

What is the defining right of a representative democracy?

A) the right to vote B) the right to freedom of speech
C) the right to petition the government D) the right to freedom of religion
 
Answer & Explanation Answer: A) the right to vote

Explanation:

The defining right of a representative democracy is the ability to vote for representatives to make decisions on their behalf.

 

 What_is_the_defining_right_of_a_representative_democracy1557485298.jpg image

 

In democratic government, elections are held regularly, in which voters vote for someone who will serve in the levels of local, state, and federal government.

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Q:

The country where the military has imposed martial law amid a political crisis

Answer

Thailand

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Q:

Which one of the following is a search engine?

A) Bing B) Reddit
C) Pinterest D) Twitter
 
Answer & Explanation Answer: A) Bing

Explanation:
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Q:

Which best describes somatic mutations?

A) transmitted to progeny B) not transmitted to progeny
C) Can't be identified D) None of the above
 
Answer & Explanation Answer: A) transmitted to progeny

Explanation:

The best example for somatic mutation would be cancer, familial cancer (which transmits through gametes to the next generation) are not so common while sporadic cancer is seen the most where body cells of a particular area goes through mutations for a number of years and becomes cancerous, but it is not transmitted to next generation.

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Q:

Fat is completely digested in the

A) small intestine B) mouth
C) large intestine D) stomach
 
Answer & Explanation Answer: A) small intestine

Explanation:

Fat is completely digested in the small intestine of the body.

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