Explanation : A vacuum tube computer, now termed a first-
generation computer, is a computer which
uses vacuum tubes for logic circuitry. A
second generation computer which is also
called transistor computer is a computer
which uses discrete transistors instead of
vacuum tubes. The computers of third
generation used Integrated Circuits (ICs) in
place of transistors. A single IC has many
transistors, resistors, and capacitors along
with the associated circuitry. The period
of fourth generation was from 1971-1980.
Computers of fourth generation used Very
Large Scale Integrated (VLSI) circuits. VLSI
circuits have about 5000 transistors.
Explanation : A computer virus is a type of malicious code
or program written to alter the way a computer
operates and is designed to spread from one
computer to another. A virus operates by
inserting or attaching itself to a legitimate
program or document that supports macros
in order to execute its code.
Explanation : Skills Acquisition and Knowledge Awareness
for Livelihood Promotion (SANKALP)project
aims to implement the mandate of the National
Skill Development Mission (NSDM), which
was launched on 15th July by Ministry of Skill
Development & Entrepreneurship, through
its core sub-missions.
Explanation : Marine pollution occurs when harmful
effects result from the entry into the ocean of
chemicals, particles, industrial, agricultural,
and residential waste, noise, or the spread of
invasive organisms. About 80% of marine
litter comes from land-based sources (eg.
through drains, sewage outfalls, industrial
outfalls, direct littering) while 20% comes
from marine-based activities such as illegal
dumping and shipping for transport, tourism