Answers to Frequently Asked Questions about

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Answers to Frequently Asked Questions about

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Web address of BIT web sitewww.ict.cmb.ac.lk

• E-mail addresses of Modules
• IT 1101 - mc_at_ict.cmb.ac.lk
• IT 1201 - fpc_at_ict.cmb.ac.lk
• IT 1301 - fcs_at_ict.cmb.ac.lk
• IT 1401 - sad_at_ict.cmb.ac.lk

3
When can we have the Model Papers?

• Model Papers are already posted to you.
• You will receive them within a week.
• Also now available in the URL
• www.ict.cmb.ac.lk/bit.htm

4
What is the web address of Model Papers ?

• www.ict.cmb.ac.lk/bitweb/coursestru/model_question
  s.htm

5
How can I overcome the difficulty of unzipping
the files ?

• To Unzip the files, you must have the latest
  version of Winzip or Winrar software. You
  could even download these free from
• http//www.download.com

6
Is the teaching material on the web enough to
study for the exam ?

• No.
• That is a guideline for the learning process.
  This is prepared for the teachers to identify the
  extent of areas to be covered. Students must
  relate the concepts in slides with the
  recommended reading material.

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Is the teaching material on the web enough to
study for the exam ?

• The slides on the web must be explained by a
  knowledgeable person
• The self studying students must read the related
  recommended material and obtain the knowledge.

8
Can I complete BIT in less than 3 Years ?

• No.
• You have to sit for the expected number of of
  module examinations for a year and pass the
  expected number of modules each year.
• The details are in the prospectus or
• in our web site www.ict.cmb.ac.lk/bit.htm

9
Can I sit for only the second semester
examination and go to the second year ?

• No. You have to sit for all 8 module examinations
  in the first year and get 40 marks for at least
  6 module papers. Details are given in the
  prospectus or refer our web site
  www.ict.cmb.ac.lk/bit.htm

10
What is the best way to study for the BIT ?

• Understand the Module Objectives.
• Use the detailed syllabus as a guide line.
• Use the recommended books to
  
  understand the theory and do
  practicals as recommended.
• Finally, try to answer the model paper within the
  given time period.

11
What is the marking scheme -Do we get partial
marks ?

• Yes.
• According to the number of correct choices and
  the number of correct and incorrect choices
  marked by the students, partial marks will be
  given.

12
Can I sit for less than four module exams in the
second semester ?

• No. You have to sit for all 4 module exams in the
  first and second semesters.
• However, if you pass at least 6 module papers,
  you can go to the second year.

13
Can someone who has not written JAVA programs
pass the exam ?

• No.
• You have to have the programming knowledge in
  JAVA.
• Refer the Objectives for further details or refer
  URL
• www.ict.cmb.ac.lk/bit.htm

14
Can we have some Sample Programs ?

• Sample Programs are given in the recommended
  books and the model paper (which have been
  posted).
• Also check URL
• www.ict.cmb.ac.lk/bitweb/coursestru/model_question
  s.htm

15
Do we have to memorise the Screen Layouts/Menus ?

• You have to know the sequence of operations, the
  steps involved and what parameters/inputs are
  needed to go to the next step.

16
How is the distribution of questions between
Fundamentals of Computer Systems and PC
Applications?

• The questions are distributed according to the
  number of hours spent on each section as given in
  the detailed syllabus.

17
Which is tested in Mathematics- The Theory or
its application ?

• Both.
• The students have to know the theory as well as
  their applications.
• Refer objectives or URL
• www.ict.cmb.ac.lk/bit.htm

18
Are we allowed to use calculators for the
Mathematics Paper ?

• No.
• We are not testing the calculating knowledge of
  the students. You need to study the theory and
  its various applications.

19
In SAD, are the questions theory based or is it
the application of theory which is more important
?

• Both.
• Understand the objectives of the Module and study
  the model paper .
• URLwww.ict.cmb.ac.lk/bit.htm

20
How do we know to what extent one has to study
the given sections ?

• Refer the Objectives and the Detailed Syllabus.
  All the information needed to study each section
  is . Also Refer URL
• www.ict.cmb.ac.lk/bit.htm

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Systems Analysis and Design Model Questions
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Question 33

• Considering the following decision tree, identify
  the correct decision table(s).

First Year
Provide hostel
Male student
Refer to Dean
Scholarship
Not first year
Without Scholarship
No hostel
Female Student
Provide hostel
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Section of the syllabus

• 5.2 Data Flow Diagrams
• 5.2.1 DFD notation
• 5.2.2 Context diagram
• 5.2.3 DFD leveling
• 5.2.4 Process descriptions, Structured English,
  Decision Trees and Decision Tables

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DFD Notations
Gane and Sarson
Yourdon/Demarco
Ref
Process or Business function
25
DFD Notations
Gane and Sarson
Yourdon/Demarco
External Entity
26
DFD Notations
Gane and Sarson
Yourdon/Demarco
Data Flow
27
DFD Notations
Gane and Sarson
Yourdon Demarco
Ref
Data Store
28
Context Diagram

• Shows the top level function defined to cover the
  scope of the application.
• It also shows the major data flows into and from
  the application.

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• Top level function is then decomposed to its
  component functions
• Include data stores
• Again each function can be decomposed to show its
  constituents sub-functions and data flows.

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• Decomposition continues until the functions
  reach elementary level. (cannot be further
  decomposed)
• In systems analysis, decomposition allows you to
  partition a system into logical subsets of
  processes for improved communication, analysis,
  and design.

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• Process Descriptions
• There are two categories
• Processes that can be decomposed
• Describe using natural language or structured
  English.
• Elementary Processes
• Describe using Structured English, Decision
  tables, or Decision trees.

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Question 33

• Considering the following decision tree, identify
  the correct decision table(s).

First Year
Provide hostel
Male student
Refer to Dean
Scholarship
Not first year
Without Scholarship
No hostel
Female Student
Provide hostel
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Correct Answers - (a) and (e)
(a)
Y-TRUE N-NOT TRUE X-TAKE ACTION TRUE/NOT
TRUE
Male Student? N Y
Y Y First Year Student? - Y N N
Scholarship holder? - - N Y
Refer to Dean - - - X No
Hostel - - X - Provide
Hostel X X - -
Decisions
Actions
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(e)
Y-TRUE N-NOT TRUE X-TAKE ACTION TRUE/NOT
TRUE
Male Student? N Y N Y Y
N First Year Student? Y Y N N N
N Scholarship holder - - Y N Y N
Refer to Dean - - - X -
- No Hostel - - - - X -
Provide Hostel X X X - -
X
Decision
Actions
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Systems Analysis and Design Model Questions
Data Modeling, E-R Modeling
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5.3 Entity Relationship Diagrams Entities,
Attributes, Relationships, Degree, Optionality,
Resolving many to many relationships, Exclusive
relationships.
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Entity-Relationship Analysis (Chen 1976)
Abstractions

• Entity -A distinct object in a system
• Relationship -A meaningful interaction
  between two entities
• Attribute - A property of an entity
• Key, Identifier

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Entities
Faculty
University
Course
Student
University of Colombo
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Relationships and Cardinality
M
1
Faculty
University
Consists of
1
Has
N
M
Student
Course
Takes
N
Optional
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Attributes and Identifiers
Student Id No Course code Attendance
Student Id No Name Address
Course code Title Lecturer Id
N
M
Student
Course
Takes
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DFDs and ERDs
External Entities and Data Stores
Entities Processes Relationships
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Question 28

• Which of the following descriptions regarding
  Data Flow Diagrams (DFD) are incorrect?

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Section of the syllabus

• 5.2 Data Flow Diagrams
• 5.2.1 DFD notation
• 5.2.2 Context diagram
• 5.2.3 DFD leveling
• 5.2.4 Process descriptions, Structured English,
  Decision Trees and Decision Tables

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• (a) A DFD is a diagram that shows the flow of
  data through a system and the processing
  performed by that system.
• Correct

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• (b) Elementary processes are the lowest levels of
  detail shown in a DFD.
• Correct
• (c) Following is a valid data flow using
  Yourdon/Demarco notations.

DS1
DS2
Wrong
46

• (d) External entities are external to the system
  being analyzed or designed.
• Correct
• (e) A file or a data store contains data that is
  retained in the system.
• Correct
• Answer (c)