IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 28 - 29 of 46

Question 28

Appeared in Year: 2009

Question

Match List-Ⅰ List-Ⅱ▾

Match the following

List-ⅠList-Ⅱ
(A)

CaDet

(i)

it could easily determine type and degree of lung cancer

(B)

PXDES

(ii)

it is used for chemical analysis

(C)

Dendral

(iii)

it can identify various bacteria

(D)

Mycin

(iv)

it is a clinical support system

Choices

Choice (4)
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (ii)
  • (iv)
  • (iii)

b.

  • (iv)
  • (i)
  • (ii)
  • (iii)

c.

  • (ii)
  • (iii)
  • (iv)
  • (i)

d.

  • (i)
  • (iv)
  • (iii)
  • (ii)

Answer

b.

Explanation

Correct answer is option A. Dendral, Mycin, PXDES and CaDet are different expert systems used for different purposes.

  • Dendral: It was an artificial intelligence based expert system used for chemical analysis. It uses a substance՚s spectrographic data to predict its molecular structure.
  • Mycin: One of the earliest expert systems based on backward chaining. It can identify various bacteria that can cause severe infections and can also recommend drugs based on the person՚s weight.
  • PXDES: It could easily determine the type and the degree of lung cancer in a patient based on the data.
  • CaDet: It is a clinical support system that could identify cancer in its early stages in patients.

Question 29

Appeared in Year: 2009

Question

MCQ▾

Which of the following statements describe advantages of email?

Choices

Choice (4)

a.

Email ensures that message will only go to the correct person (if addressed correctly)

b.

Attachments included in email can be downloaded

c.

In comparison to phone numbers email addresses are difficult to remember

d.

Both a. and b. are correct

Answer

d.

Explanation

The statements A and C describe the advantages of email.

  • Confidentiality is the main advantage of using email that is email ensures that if address is provided correctly then the message will only go to the person who is intended to read the message.
  • The attachments included in email can be downloaded and edited, definitely this is an advantage.
  • Limit in size of attachments based on system is a disadvantage since it does not allow all users to exploit the features of email fully.
  • Email id՚s are lengthy since it contains localpart@domain sections ex: riya@gmail. com these are difficult to remember compared to phone numbers and due to its length if a person address an receiver email id wrong then it will affect the confidentiality of message.

Some of the other advantages include:

  • Faster transmission rates
  • Large documents can be send

Some of the other disadvantages include:

Slower turnaround time

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