Science and Technology MCQs

Static General Knowledge

Science and Technology MCQs

Practice Science and Technology MCQs with answers and detailed explanations covering scientific inventions, technological advancements, space missions, information technology, biotechnology, artificial intelligence, discoveries, innovations and current developments frequently asked in SSC, Railway, Banking, UPSC, JKSSB, Police, Defence, Teaching and other competitive examinations.

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Practice Questions

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Question #21
What is the speed of light approximately?
A. 1,000,000 km/s
B. 30,000 km/s
C. 300,000 km/s
D. 150,000 km/s
Discuss
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Correct Answer: Option C

Explanation:
The speed of light in a vacuum is approximately 300,000 kilometers per second.
This question belongs to: Static General Knowledge Science and Technology
Question #22
Which organ in the human body is primarily responsible for blood filtration?
A. Kidneys
B. Lungs
C. Liver
D. Heart
Discuss
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Correct Answer: Option A

Explanation:
The kidneys filter blood to remove waste and excess water, producing urine.
This question belongs to: Static General Knowledge Science and Technology
Question #23
What is the term for a computer program that mimics human conversation?
A. Algorithm
B. Search Engine
C. Chatbot
D. Database
Discuss
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Correct Answer: Option C

Explanation:
A chatbot is an AI-powered software designed to simulate conversation with human users.
This question belongs to: Static General Knowledge Science and Technology
Question #24
Which element has the atomic number 1?
A. Hydrogen
B. Carbon
C. Helium
D. Oxygen
Discuss
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Correct Answer: Option A

Explanation:
Hydrogen is the lightest element and sits at the first position in the periodic table.
This question belongs to: Static General Knowledge Science and Technology
Question #25
What is 5G technology primarily associated with?
A. Improved satellite broadcasting
B. Faster mobile internet speeds
C. Personal computer hardware
D. Electric vehicle engines
Discuss
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Correct Answer: Option B

Explanation:
5G is the fifth generation of wireless technology, offering significantly faster data speeds and lower latency.
This question belongs to: Static General Knowledge Science and Technology
Question #26
Which of these is a primary greenhouse gas produced by livestock?
A. Methane
B. Nitrogen
C. Neon
D. Helium
Discuss
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Correct Answer: Option A

Explanation:
Methane is a potent greenhouse gas emitted during the digestive processes of livestock.
This question belongs to: Static General Knowledge Science and Technology
Question #27
Which tech company is the developer of the 'Windows' operating system?
A. IBM
B. Apple
C. Google
D. Microsoft
Discuss
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Correct Answer: Option D

Explanation:
Microsoft is the multinational corporation behind the Windows OS.
This question belongs to: Static General Knowledge Science and Technology
Question #28
What does 'DNA' stand for?
A. Deoxyribonucleic Acid
B. Detoxified Nucleic Acid
C. Digital Nucleic Acid
D. Dynamic Nucleic Acid
Discuss
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Correct Answer: Option A

Explanation:
DNA stands for Deoxyribonucleic Acid, which carries genetic instructions for life.
This question belongs to: Static General Knowledge Science and Technology
Question #29
Which scientist is famously associated with the theory of relativity?
A. Albert Einstein
B. Galileo Galilei
C. Niels Bohr
D. Isaac Newton
Discuss
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Correct Answer: Option A

Explanation:
Albert Einstein formulated the theory of general and special relativity.
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Question #30
What is the most abundant gas in the Earth's atmosphere?
A. Nitrogen
B. Hydrogen
C. Oxygen
D. Carbon Dioxide
Discuss
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Correct Answer: Option A

Explanation:
Nitrogen makes up about 78% of Earth's atmosphere.
This question belongs to: Static General Knowledge Science and Technology
Question #31
What is the purpose of a firewall in network security?
A. To block unauthorized access to a network
B. To enhance graphic display
C. To store backup files
D. To speed up internet connection
Discuss
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Correct Answer: Option A

Explanation:
A firewall monitors and controls incoming and outgoing network traffic based on security rules.
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Question #32
Which of these is an example of a supercomputer?
A. PlayStation
B. iPhone
C. PARAM
D. Kindle
Discuss
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Correct Answer: Option C

Explanation:
PARAM is a series of supercomputers developed in India.
This question belongs to: Static General Knowledge Science and Technology
Question #33
What part of the human eye is sensitive to light?
A. Iris
B. Retina
C. Cornea
D. Pupil
Discuss
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Correct Answer: Option B

Explanation:
The retina is the light-sensitive tissue at the back of the eye.
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Question #34
Which of these is a key benefit of electric vehicles?
A. Use of leaded fuel
B. Higher reliance on oil
C. High carbon emissions
D. Zero tailpipe emissions
Discuss
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Correct Answer: Option D

Explanation:
Electric vehicles do not emit tailpipe pollutants, helping to reduce local air pollution.
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Question #35
What is a 'virus' in computer technology?
A. A cloud storage service
B. A hardware component
C. A type of malicious software
D. An operating system update
Discuss
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Correct Answer: Option C

Explanation:
A computer virus is a type of malicious software that replicates itself to damage files or systems.
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Question #36
Which element is commonly used in solar panels to produce electricity?
A. Copper
B. Iron
C. Carbon
D. Silicon
Discuss
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Correct Answer: Option D

Explanation:
Photovoltaic cells in solar panels are typically made of silicon.
This question belongs to: Static General Knowledge Science and Technology
Question #37
What is the function of the RAM in a computer?
A. Permanent storage of files
B. Processing visual data
C. Managing internet connection
D. Temporary data storage for active tasks
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Correct Answer: Option D

Explanation:
RAM (Random Access Memory) provides fast, temporary workspace for the computer's CPU.
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Question #38
Which of these is a famous AI research laboratory?
A. CERN
B. SpaceX
C. OpenAI
D. NASA
Discuss
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Correct Answer: Option C

Explanation:
OpenAI is one of the leading organizations in artificial intelligence research.
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Question #39
What is the term for the biological process where cells divide to form two identical cells?
A. Mitosis
B. Fertilization
C. Pollination
D. Meiosis
Discuss
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Correct Answer: Option A

Explanation:
Mitosis is the process of cell division resulting in two daughter cells with identical genetic material.
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Question #40
Which planet is commonly referred to as the 'Red Planet'?
A. Jupiter
B. Venus
C. Saturn
D. Mars
Discuss
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Correct Answer: Option D

Explanation:
Mars is known as the Red Planet due to the iron oxide on its surface.
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