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75.  What do you understand by Cartesian Product?
         Ans. Cartesian product refers to all possible pairs of rows from two relations. It will just return a product of rows and
              the sum of columns from multiple relations with or without common attributes.

          76.  Ritwik has to share the data among various computers of his two offices branches situated in different cities.
              Name the network (out of LAN, WAN, PAN and MAN) which is being formed in this process.
         Ans. MAN

          77.  Find the odd one out:
              repeater, mesh, router, gateway
         Ans. mesh

          78.  Navodaya school has connected all its computers placed at library, office and computer labs. Name the network
              (out of LAN, WAN, PAN and MAN) which is being formed in this process.
         Ans. LAN

          79.  What is a third-party software used to boost the performance of the browser known as?
         Ans. Plug-in

          80.  Ritika wants to launch a clothing website which displays clothes according to the taste of customers visiting her
              website. Which of the following types of websites she needs to design?
              (i)  Static web site
              (ii)  Dynamic web site

         Ans. She needs to design a dynamic web site.
          81.  Rohit has a desktop, a laptop and a smartphone at home. Name the hardware device which he can use to
              connect all of them to a single internet connection.
         Ans. Router can be used to connect a desktop, a laptop and a smart phone at home to a single internet connection.

          82.  What is a text file, containing a string of information, which is transferred by the website to the browser when
              we browse it known as?
         Ans. Cookie is a text file, containing a string of information, which is transferred by the website to the browser when
              we browse.

          83.  Give full forms of the following:
              (i)  URL               (ii)  VoIP
         Ans. (i)  Uniform Resource Locator
              (ii)  Voice Over Internet Protocol

          84.  Expand the following terms related to Computer Networks:                  [CBSE Sample Paper, 2021]
              (i)  SMTP              (ii)  POP
              (iii)  FTP             (iv)  VoIP

         Ans. Expand the following terms related to Computer Networks: [CBSE Sample Paper, 2021]
              (i)  SMTP              (ii)  POP
              (iii)  FTP             (iv)  VoIP
          85.  Ayush wants to design his credit card using a software but does not have enough money to pay for it. Which type
              of software can he use?

         Ans. Free or Open Source Software (FOSS)

          342  Touchpad Informatics Practices-XII
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