71. What is the purpose of computer encryption?
a) to store data
b) to process data
c) to display data
d) to protect data by encoding it into a secret code or cipher
Answer: d) to protect data by encoding it into a secret code or cipher (encryption is the process of encoding data to protect it from unauthorized access or theft, by converting it into a secret code or cipher)
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72. Which of the following is an example of a computer network topology?
a) client-server
b) hypertext transfer protocol
c) ethernet
d) modem
Answer: a) client-server (a network topology is the arrangement of the elements of a computer network, such as the physical or logical layout, and can include topologies such as client-server, peer-to-peer, star, or ring)
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73. What is the purpose of computer defragmentation?
a) to store data
b) to process data
c) to display data
d) to optimize hard drive performance by rearranging data fragments on the disk
Answer: d) to optimize hard drive performance by rearranging data fragments on the disk (defragmentation is the process of rearranging data fragments on a hard drive to optimize performance and reduce access time)
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74. Which of the following is an example of a computer input device?
a) monitor
b) keyboard
c) printer
d) speakers
Answer: b) keyboard (an input device is a hardware component that allows users to input data or instructions into a computer system, such as keyboards, mice, touchscreens, or scanners)
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75. What is the purpose of computer file compression?
a) to store data
b) to process data
c) to display data
d) to reduce the size of files for more efficient storage and transmission
Answer: d) to reduce the size of files for more efficient storage and transmission (file compression is the process of encoding data into a smaller size for more efficient storage or transmission, such as through compression algorithms like ZIP or RAR)
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