💻 Computer Awareness कंप्यूटर ज्ञान
156 exam-ready facts · 156 MCQs
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1
Cache is a memory buffer used to accommodate a speed differential between different system components.
Cache memory acts as a high-speed buffer to bridge speed gaps.
Asked in SSC CGL 2016 (28 Aug, Shift 3)
Practice (1)
Q1What is the name of a memory buffer used to accommodate a speed differential ?
Show answer
Correct answer: A — Cache
Answer: (A)
The correct option is (A). -
2
Charles Babbage is called the 'Father of the Computer'; he designed the Difference Engine and the Analytical Engine.
The Analytical Engine (described in 1837) was the first design for a general-purpose programmable mechanical computer, but it was never completed in Babbage's lifetime.
Practice (1)
Q2Who is called the 'Father of the Computer'?
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Correct answer: B — Charles Babbage
Charles Babbage designed the Analytical Engine, so he is called the Father of the Computer. -
3
Data Integrity means that the data available in the database is both accurate and consistent.
Data integrity ensures the overall accuracy and completeness of data.
Asked in SSC CGL 2016 (27 Aug, Shift 3)
Practice (1)
Q3In IT, means that the data available in the database is both accurate and consistent.
Show answer
Correct answer: D — Data Integrity
Answer: (D)
The correct option is (D). -
4
Ada Lovelace is regarded as the world's first computer programmer; she wrote an algorithm for Babbage's Analytical Engine.
Practice (1)
Q4Who is regarded as the world's first computer programmer?
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Correct answer: C — Ada Lovelace
Ada Lovelace published (1843) an algorithm to compute Bernoulli numbers on the Analytical Engine. -
5
Polymorphic virus changes each time it is installed to avoid detection by antivirus software.
Polymorphic viruses use a mutation engine to alter their signature.
Asked in SSC CGL 2016 (29 Aug, Shift 1)
Practice (1)
Q5_____changes each time it is installed to avoid detection by antivirus software.
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Correct answer: A — Polymorphic virus
Answer: (A)
The correct option is (A). -
6
ENIAC was the first programmable, electronic, general-purpose digital computer; completed in 1945 and unveiled in 1946, it used vacuum tubes.
ENIAC = Electronic Numerical Integrator and Computer, built by J. Presper Eckert and John Mauchly at the University of Pennsylvania. Vacuum tubes mark the first generation.
Practice (1)
Q6Which electronic component was mainly used in ENIAC?
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Correct answer: D — Vacuum tubes
ENIAC was a first-generation computer that used about 18,000 vacuum tubes. -
7
The Intel 4004 (1971) was the first commercially available single-chip microprocessor.
It was a 4-bit CPU on a single chip. Microprocessors mark the fourth generation of computers.
Practice (1)
Q7Which was the first commercially available single-chip microprocessor?
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Correct answer: A — Intel 4004
The Intel 4004 was released in 1971; it was a 4-bit processor. -
8
RAM is not an external storage device, whereas CD-ROM, DVD-ROM, and Pen Drive are external.
RAM is volatile primary memory located directly on the motherboard.
Asked in SSC CGL 2016 (29 Aug, Shift 3)
Practice (1)
Q8Which is not an external storage device?
Show answer
Correct answer: D — RAM
Answer: (D)
The correct option is (D). -
9
Tim Berners-Lee invented the World Wide Web (WWW) at CERN in 1989.
The Internet and the WWW differ: the Internet is a network of networks, while the WWW is the system of web pages (HTTP, HTML, URL) that runs on it.
Practice (1)
Q9Who invented the World Wide Web (WWW)?
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Correct answer: B — Tim Berners-Lee
Tim Berners-Lee proposed the WWW at CERN in 1989. Vint Cerf is associated with TCP/IP. -
10
Excess-3 Code is an example of a non-weighted code in digital electronics.
Non-weighted codes do not assign positional weight to their bit positions.
Asked in SSC CGL 2016 (30 Aug, Shift 2)
Practice (1)
Q10Which of the following is not a weighted code?
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Correct answer: A — Excess 3 - Code
Answer: (A)
The correct option is (A). -
11
In IT terminology, a critical failure in the operating system kernel is called a crash.
A kernel crash forces the system to either restart or halt entirely.
Asked in SSC CGL 2016 (31 Aug, Shift 1)
Practice (1)
Q11In IT terminology failure in the kernel is called as
Show answer
Correct answer: A — crash
Answer: (A)
The correct option is (A). -
12
The computer mouse was invented by Douglas Engelbart in the 1960s (the first prototype was built by Bill English).
Practice (1)
Q12Who invented the computer mouse?
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Correct answer: C — Douglas Engelbart
Douglas Engelbart developed the mouse at Stanford Research Institute and demonstrated it in 1968. -
13
PARAM 8000 (1991) is regarded as India's first supercomputer; it was built by C-DAC, Pune.
C-DAC = Centre for Development of Advanced Computing. The effort was led by Vijay Bhatkar.
Practice (1)
Q13Which organisation built PARAM 8000, India's first supercomputer?
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Correct answer: D — C-DAC
PARAM 8000 was built in 1991 by C-DAC, Pune, under Vijay Bhatkar. -
14
The computer virus 'worm' uses the spawn mechanism to duplicate itself across networks.
Spawn allows a program to create a new process of itself.
Asked in SSC CGL 2016 (31 Aug, Shift 3)
Practice (1)
Q14Which mechanism is used by the computer virus 'worm' to duplicate itself?
Show answer
Correct answer: C — Spawn
Answer: (C)
The correct option is (C). -
15
Write-through is the method for updating main memory as soon as a word is removed from cache.
Write-through updates both cache and main memory simultaneously.
Asked in SSC CGL 2016 (1 Sep, Shift 2)
Practice (1)
Q15In IT, the method for updating the main memory as soon as a word is removed from the cache is called
Show answer
Correct answer: B — Write-back
Answer: (B)
The correct option is (B). -
16
The (point-contact) transistor was invented in 1947 at Bell Labs by John Bardeen and Walter Brattain; with William Shockley, all three shared the 1956 Nobel Prize in Physics.
Transistors mark the second generation of computers, replacing vacuum tubes.
Practice (1)
Q16In which laboratory was the transistor invented in 1947?
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Correct answer: A — Bell Labs
Bardeen and Brattain built the point-contact transistor at Bell Labs in 1947. -
17
The computer worm uses the spawn mechanism to duplicate itself continuously.
Worms replicate without needing a host program.
Asked in SSC CGL 2016 (1 Sep, Shift 3)
Practice (1)
Q17Which of the following uses the spawn mechanism to duplicate itself ?
Show answer
Correct answer: B — Worm
Answer: (B)
The correct option is (B). -
18
Ray Tomlinson sent the first network email over ARPANET in 1971 and introduced the @ sign in email addresses.
Practice (1)
Q18Who introduced the '@' sign in email addresses?
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Correct answer: B — Ray Tomlinson
Ray Tomlinson chose @ in 1971 to separate the user name from the host. -
19
The Linux operating system kernel was created by Linus Torvalds in 1991.
Linux is open source; Android is also based on the Linux kernel.
Practice (1)
Q19Who created the Linux kernel?
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Correct answer: C — Linus Torvalds
Linus Torvalds released the Linux kernel in 1991. Stallman is linked with the GNU Project. -
20
Job Scheduler selects processes from the job pool and loads them into memory for execution.
The job scheduler determines which programs are admitted to the system.
Asked in SSC CGL 2016 (2 Sep, Shift 1)
Practice (1)
Q20In computer processing, __________ selects processes from the pool and loads them into memory for execution.
Show answer
Correct answer: A — Job Scheduler
Answer: (A)
The correct option is (A).