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MIDTERM EXAM (S.A D.D)
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Which of the following is NOT an advantage of using decision table?
ANSWER:
Easy detection of program error
In the ER Diagram, normally entities are
ANSWER:
Nouns
Which of the following is BEST for checking for completeness?
ANSWER:
Decision Table
The _____________________ is a catalogue of all data used in an application, their names, type
and their origin.
ANSWER:
Data dictionary
Given employee (employee number, salary, department code, supervisor code). What is the
unique relation key.
ANSWER:
Employee number
TRUE or FALSE. For every condition, there should only be 2 actions.
ANSWER:
False
Logical operators are used in constructing a Structured English, which of the following is not
a logical operator?
ANSWER:
IF
As a guideline in DFD, nouns are used to name an external entity.
ANSWER:
TRUE
The following are requirements of a good code EXCEPT
ANSWER:
Lengthy
Which of the following classification of codes is NOT comprehensive?
ANSWER:
Serial number and Block codes
Which of the following is a valid ER Diagram?
ANSWER:
The objective of using structured English is to
ANSWER:
describe computational procedures reasonably precisely which can be understood by any
user
Two data stores cannot be connected by a data flow
ANSWER:
TRUE
A _________________ DFD is similar to a document flow diagram.
ANSWER:
Physical
The Student Grading Information System needs to compute for the average grade on 10
quizzes of a student. What is the correct Structured English?
ANSWER:
for quiz = 1 to quiz = 10 do
{
Total Score = Total Score + Score
}
end for
Average = Total Score / 10
Data cannot flow from process to external entity.
ANSWER:
FALSE
The main models of interactive data input are
ANSWER:
Menus, Templates, Commands
To use a ________, a ___________ model of data needed for current and future applications is
designed. ___________ modelling is useful for this.
ANSWER:
DBMS, conceptual, Entity Relationship
Entities are represented by
ANSWER:
Rectangle
If the process p is expanded, the process at the next level will be labeled as
ANSWER:
p.1, p.2, p.3
This ________________ is a procedure used to transform a set of relations into another set which
has some desirable properties.
ANSWER:
Export Transport Load
What is metadata?
ANSWER:
Data about data
In Entity Relationship, a tuple is
ANSWER:
a row of relation
The following are entities EXCEPT
ANSWER:
Volunteer & Officer
TRUE or FALSE. A decision table is said to be complete if it has at least 2 possible distinct
elementary rules.
ANSWER:
FALSE
A data flow diagram
ANSWER:
All of the choices
Every member of an entity set is described by its
ANSWER:
Attributes
In the ER Diagram, relationships are
ANSWER:
Verbs
Structured English and Decision Table are procedural.
ANSWER:
FALSE
A data element in a data dictionary may have
ANSWER:
no value
The _____________________ is where user presented several alternatives and asked to type his/her
choice.
ANSWER:
screen
Loops are allowed in DFD.
ANSWER:
FALSE
In Entity Relationship, the Student number, Course, Date Enrolled, Gender are examples of
ANSWER:
Attributes
Which of the following statements is INCORRECT with respect to a Data Dictionary?
ANSWER:
Data dictionary and data source both are the same
Relationship are normalized to ensure that
ANSWER:
All of the choices
Which of the following does NOT describe Structured English?
ANSWER:
Structured English should be written or follow the programming syntax rules and convention
Keep the number of processes at each level ____.
ANSWER:
Less than 7
Which of the following why there is a need for codes?
ANSWER:
All of the choices
Which of the following is an entity
ANSWER:
Programmer & Employee
Provides overview of the system to be designed.
ANSWER:
Context Diagram
This method of top down analysis and breaking down DFDs to give more and more detail is
known as splitting.
ANSWER:
FALSE
Given the DFD below:
ANSWER:
The DFD is incorrect, the symbol of customer and billing system was interchanged.
If a DFD is too detailed it will have too many data flows and will be easy to understand.
ANSWER:
FALSE
A rectangle represents
ANSWER:
An External Entity
E-R Model has the ability to describe
ANSWER:
All of the choices
This gives a single point reference of data repository of an organization.
ANSWER:
Data dictionary
Decision trees are drawn _________________
ANSWER:
From Left to Right
Data dictionary may be used to eliminate redundancy.
ANSWER:
TRUE
To reduce errors in input, it is essential to ______________.
ANSWER:
carefully design the forms used for entering data.
Which of the following is BEST in sequencing conditions by priority?
ANSWER:
Decision Trees