Electronic waste or E-waste is the collective term for discarded electrical or electronic devices such as computers, mobile phones, etc that enter the waste stream from various sources. E-waste contains significant concentration of substances that are highly toxic and are hazardous to human health and the environment.

Correct Option: D

Electronic waste or E-waste is the collective term for discarded electrical or electronic devices such as computers, mobile phones, etc that enter the waste stream from various sources. E-waste contains significant concentration of substances that are highly toxic and are hazardous to human health and the environment.

Line Printer: prints a whole line of characters at a time; Daisy Wheel Printer and Dot-Matrix printer: print one character at a time; and Laser printer: prints one page at a time. A daisy wheel printer is an example of a character printer which prints one complete character at a time.

Correct Option: A

Line Printer: prints a whole line of characters at a time; Daisy Wheel Printer and Dot-Matrix printer: print one character at a time; and Laser printer: prints one page at a time. A daisy wheel printer is an example of a character printer which prints one complete character at a time.

Hyper Text Markup Language (HTML) is the main markup language for creating web pages and other information that can be displayed in a web browser. HTML is written in the form of HTML elements consisting of tags enclosed in angle brackets (like ), within the web page content

Correct Option: A

Hyper Text Markup Language (HTML) is the main markup language for creating web pages and other information that can be displayed in a web browser. HTML is written in the form of HTML elements consisting of tags enclosed in angle brackets (like ), within the web page content

A moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-235. Commonly used moderators include regular (light) water (roughly 75% of the world's reactors), solid graphite (20% of reactors) and heavy water (5% of reactors).

Correct Option: C

A moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-235. Commonly used moderators include regular (light) water (roughly 75% of the world's reactors), solid graphite (20% of reactors) and heavy water (5% of reactors).

A modem turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data.

Correct Option: B

A modem turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data.