UGC NET Computer Science Software Engineering Previous Year Questions (PYQs) – Page 2 of 11
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Match List I with List II.With reference to CMM developed by Software Engineering Institute (SEI)
Choose the correct answer from the options given below:
| List I | List II |
|---|---|
| (A) INITIAL | (I) Process measurement |
| (B) REPEATABLE | (II) Process definition |
| (C) DEFINED | (III) Project management |
| (D) MANAGED | (IV) ADHOC |
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Solution
CMM has different maturity levels.
INITIAL level means the process is ad hoc.
So, (A) matches with IV.
REPEATABLE level focuses on project management.
So, (B) matches with III.
DEFINED level focuses on process definition.
So, (C) matches with II.
MANAGED level focuses on process measurement.
So, (D) matches with I.
Final matching is:
A-IV, B-III, C-II, D-I
INITIAL level means the process is ad hoc.
So, (A) matches with IV.
REPEATABLE level focuses on project management.
So, (B) matches with III.
DEFINED level focuses on process definition.
So, (C) matches with II.
MANAGED level focuses on process measurement.
So, (D) matches with I.
Final matching is:
A-IV, B-III, C-II, D-I
The cyclomatic complexity of the following flow graph is:
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Solution
Cyclomatic complexity formula:
$V(G) = E - N + 2P$
Where
$E$ = number of edges
$N$ = number of nodes
$P$ = number of connected components (here $P=1$)
From the graph:
Nodes = 10
Edges = 12
So,
$V(G) = 12 - 10 + 2(1)$
$V(G) = 4$
Which of the following is not the goal of reverse engineering?
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Solution
Goals of reverse engineering:
• Recover lost design information
• Understand system structure
• Detect side effects
• Manage system complexity
Data flow itself is not a goal, but rather a representation or analysis technique.
Consider the following statements about the software product line system:
Statement I: At the interaction level, components provide an operator display interface and an interface with the communication system used.
Statement II: At the I/O management level, components handle operator authentication, report generator and query manager.
In the light of the above statements, choose the most appropriate answer from the options given below.
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Solution
Statement I is correct because interaction level provides operator display interface and communication interface.
Statement II is also correct because I/O management level handles authentication, report generation and query management.
Arrange the following types of Cohesion from best to worst type.
(A) Logical Cohesion
(B) Sequential Cohesion
(C) Communication Cohesion
(D) Temporal Cohesion
(E) Procedural Cohesion
Choose the correct answer from the options given below:
(A) Logical Cohesion
(B) Sequential Cohesion
(C) Communication Cohesion
(D) Temporal Cohesion
(E) Procedural Cohesion
Choose the correct answer from the options given below:
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Solution
The strength of cohesion from best to worst is generally:
Functional Cohesion
Sequential Cohesion
Communication Cohesion
Procedural Cohesion
Temporal Cohesion
Logical Cohesion
Coincidental Cohesion
Here, Functional Cohesion and Coincidental Cohesion are not given.
So, from the given options, best to worst order is:
Sequential Cohesion $\rightarrow$ Communication Cohesion $\rightarrow$ Procedural Cohesion $\rightarrow$ Temporal Cohesion $\rightarrow$ Logical Cohesion
According to given symbols:
$B\rightarrow C\rightarrow E\rightarrow D\rightarrow A$
Functional Cohesion
Sequential Cohesion
Communication Cohesion
Procedural Cohesion
Temporal Cohesion
Logical Cohesion
Coincidental Cohesion
Here, Functional Cohesion and Coincidental Cohesion are not given.
So, from the given options, best to worst order is:
Sequential Cohesion $\rightarrow$ Communication Cohesion $\rightarrow$ Procedural Cohesion $\rightarrow$ Temporal Cohesion $\rightarrow$ Logical Cohesion
According to given symbols:
$B\rightarrow C\rightarrow E\rightarrow D\rightarrow A$
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Validity checks real need of system users.
Reason R: Completeness checks system user defined requirements.
In the light of the above statements, choose the correct answer from the options given below.
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Solution
Assertion A is true because validity checks whether requirements match the real needs of users.
Reason R is also true because completeness checks whether all user-defined requirements are included.
But Reason R does not explain Assertion A.
The ratio of error found before software delivery and to the total errors (before and after) is called:
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Solution
Defect Removal Efficiency (DRE):
$\text{DRE} = \frac{\text{Errors found before delivery}}{\text{Errors before + after delivery}}$
Thus the metric described is Defect Removal Efficiency.
RAD software process model stands for-
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Solution
RAD stands for Rapid Application Development.
RAD is a software process model used for fast development of software.
In this model, development is done quickly with the help of prototypes, user feedback and reusable components.
Now check the options:
Option (a) Rapid Application Development is the full form of RAD.
Option (b) Relative Application Development is not correct.
Option (c) Rapid Application Design is not the standard full form.
Option (d) Recent Application Development is not correct.
RAD is a software process model used for fast development of software.
In this model, development is done quickly with the help of prototypes, user feedback and reusable components.
Now check the options:
Option (a) Rapid Application Development is the full form of RAD.
Option (b) Relative Application Development is not correct.
Option (c) Rapid Application Design is not the standard full form.
Option (d) Recent Application Development is not correct.
Given below are two statements:
Statement I: Subsystem models show logical grouping of objects into coherent subsystem
Statement II: State machine models show how objects change their states in response to events.
In the light of the above statements, choose the most appropriate answer from the options given below.
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Solution
Statement I is correct because subsystem models represent logical grouping of objects into subsystems.
Statement II is correct because state machine models show state changes of objects due to events.
If every requirement can be checked by a cost effective process, then SRS is called
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Solution
SRS means Software Requirement Specification.
A requirement is called verifiable when it can be checked or tested by some practical process.
Here, the question says every requirement can be checked by a cost effective process.
This directly means that the requirement can be verified.
Now check the options:
Traceable means requirements can be traced from source to design or testing.
Modifiable means changes can be made easily in SRS.
Complete means all requirements are present.
Verifiable means each requirement can be checked or tested.
A requirement is called verifiable when it can be checked or tested by some practical process.
Here, the question says every requirement can be checked by a cost effective process.
This directly means that the requirement can be verified.
Now check the options:
Traceable means requirements can be traced from source to design or testing.
Modifiable means changes can be made easily in SRS.
Complete means all requirements are present.
Verifiable means each requirement can be checked or tested.
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