COCOMO-Model

Question 1
Estimation of software development effort for organic software in basic COCOMO is
A
E = 2.0(KLOC)1.05 Per Month
B
E = 3.4(KLOC)1.06 Per Month
C
E = 2.4(KLOC)1.05 Per Month
D
E = 2.4(KLOC)1.07 Per Month
       Software-Engineering       COCOMO-Model       ISRO-2017 May
Question 1 Explanation: 
The basic COCOMO equations take the form
1. Effort Applied (E) = ab(KLOC)bb [ man-months ]
2. Development Time (D) = cb(Effort Applied)db [months]
3. People required (P) = Effort Applied / Development Time [count]

where, KLOC is the estimated number of delivered lines (expressed in thousands ) of code for project. The constants ab, bb, cb and db are given in the following table (note: the values listed below are from the original analysis, with a modern reanalysis producing different values)

Question 2
A company needs to develop digital signal processing software for one of its newest inventions. The software is expected to have 20000 lines of code. The company needs to determine the effort in person-months needed to develop this software using the basic COCOMO model. The multiplicative factor for this model is given as 2.2 for the software development on embedded systems, while the exponentiation factor is given as 1.50. What is the estimated effort in person-months?
A
196.77
B
206.56
C
199.56
D
210.68
       Software-Engineering       COCOMO-Model       ISRO-2016
Question 2 Explanation: 
Constructive Cost Model (COCOMO) formula for effort applied is
Effort Applied (E) = ab(KLOC)bb [ person-months ]
= 2.2 x(20)1.50
= 2.2 x 89.44
= 196.77
Question 3
The cyclomatic complexity of each of the modules A and B shown below is 10. what is the cyclomatic complexity of the sequential integration shown on the right hand side?
A
19
B
21
C
20
D
10
       Software-Engineering       COCOMO-Model       Nielit Scientist-B CS 22-07-2017
Question 3 Explanation: 
Cyclomatic complexity is a software metric used to indicate the complexity of a program.
It is a quantitative measure of the number of linearly independent paths through a program's source code.
Cyclomatic Complexity of module = Number of decision points of program + 1
Number of decision points in module-A = 10 - 1 = 9
Number of decision points in module-B = 10 - 1 = 9
Cyclomatic Complexity of the integration(both A and B) = Number of decision points + 1
= (9 + 9) + 1
= 19
Question 4
A company needs to develop digital signal processing software for one of its newest inventions. The software is expected to have 40000 lines of code. The company needs to determine the effort in person-months needed to develop this software using the basic COCOMO model. The multiplicative factor for this model is given as 2.8 for the software development on embedded systems, while the exponentiation factor is given as 1.20. What is the estimated effort in person-months?
A
234.25
B
932.50
C
287.80
D
122.40
       Software-Engineering       COCOMO-Model       Nielit Scientist-B CS 22-07-2017
Question 4 Explanation: 
The Constructive Cost Model (COCOMO) is an algorithmic software cost estimation model developed by Barry Boehm. The model uses a basic regression formula, with parameters that are derived from historical project data and current project characteristics
In the Constructive Cost Model (COCOMO), following is formula for effort applied
Effort Applied (E) = ab(KLOC)b [ person-months ]
= 2.8 x(40)1.20
= 2.8 x 83.65
= 234.25
Question 5
On an average, the programmer months is given by 3.6 * (KLOC)​ 1.2​ . If so, a project requiring one thousand source instructions will require
A
3.6PM
B
0.36PM
C
0.0036PM
D
7.23PM
       Software-Engineering       COCOMO-Model       Nielit Scientist-B CS 2016 march
Question 5 Explanation: 
Given programmer months is given by 3.6 * (KLOC)​ 1.2​ and lines of codes are 1000 =1K.
=3.6(1)​ 1.2​ =3.6 Programmer months.
Question 6
Relation of COCOMO model is
A
E=a*(KLOC)​ 6
B
E=a*(KLOC)​ 5
C
E=a*(KLOC)​ 7
D
E=a*(KLOC)​ 3
E
None of These
       Software-Engineering       COCOMO-Model       Nielit Scientist-B CS 2016 march
Question 6 Explanation: 
The basic COCOMO equations take the form
Effort Applied (E) = a​ b​ (KLOC)​ b b​ [ man-months ]
Development Time (D) = c​ b​ (Effort Applied)​ db​ [months]
People required (P) = Effort Applied / Development Time [count]
Question 7
The COCOMO model is used for __________ .
A
software design
B
software cost estimation
C
software cost approximation
D
software analysis
       Software-Engineering       COCOMO-Model       UGC NET CS 2006 June-Paper-2
Question 7 Explanation: 
The COCOMO model is used for software cost estimation.
The basic COCOMO equations take the form
1. Effort Applied (E) = a(KLOC)​ b
2. Development Time (D) = c(Effort Applied)​ d
3. People required (P) = Effort Applied / Development Time [count]
where, KLOC is the estimated number of delivered lines (expressed in thousands ) of code for project. The constants a, b, c and d are given in the following table (note: the values listed below are from the original analysis, with a modern reanalysis producing different values).
Question 8
COCOMO stands for
A
COmposite COst MOdel
B
COnstructive COst MOdel
C
COnstructive Composite MOdel
D
COmprehensive Construction MOdel
       Software-Engineering       COCOMO-Model       UGC NET CS 2013 June-paper-2
Question 8 Explanation: 
COCOMO stands for COnstructive COst MOdel. It is a procedural software cost estimation model but not software process model. Linear sequential,prototype and spiral models are software process models.
The basic COCOMO equations take the form
1. Effort Applied (E) = a(KLOC)b [ man-months ]
2. Development Time (D) = c(Effort Applied)d [months]
3. People required (P) = Effort Applied / Development Time [count]
Question 9
The COCOMO model was introduced in the book title “Software Engineering Economics” authored by
A
Abraham Silberschatz
B
Barry Boehm
C
C.J. Date
D
D.E. Knuth
       Software-Engineering       COCOMO-Model       UGC NET CS 2010 Dec-Paper-2
Question 9 Explanation: 
The COCOMO model was introduced in the book title “Software Engineering Economics” authored by Barry Boehm.
Question 10
COCOMO model is used for :
A
Product quality estimation
B
Product complexity estimation
C
Product cost estimation
D
All of the above
       Software-Engineering       COCOMO-Model       UGC NET CS 2008 Dec-Paper-2
Question 10 Explanation: 
COCOMO model is used for product cost estimation.
Question 11
A simple stand - alone software utility is to be developed in ‘C’ programming by a team of software experts for a computer running Linux and the overall size of this software is estimated to be 20,000 lines of code. Considering (a, b) = (2.4, 1.05) as multiplicative and exponention factor for the basic COCOMO effort estimation equation and (c, d) = (2.5, 0.38) as multiplicative and exponention factor for the basic COCOMO development time estimation equation, approximately how long does the software project take to complete ?
A
10.52 months
B
11.52 months
C
12.52 months
D
14.52 months
       Software-Engineering       COCOMO-Model       UGC NET CS 2017 Nov- paper-3
Question 11 Explanation: 
Given data,
-- lines of code(LOC)= 20,000 (or 20K)
-- Multiplicative value ‘a’=2.4
-- Exponential ‘b’=1.05
-- Basic COCOMO formula= a*(LOC in K)b
-- Multiplicative value ‘c’=2.5
-- Exponential ‘d’=0.38
-- Development=c*(basic COCOMO result)d
Step-1: Basic COCOMO formula= a*(LOC in K)b
= 2.4*(20)1.05
= 55.756
Step-2: Development= c*(basic COCOMO result)d
= 2.5(55.756)0.38
= 11.52 months
Question 12
A software company needs to develop a project that is estimated as 1000 function points and is planning to use JAVA as the programming language whose approximate lines of code per function point is accepted as 50. Considering a = 1.4 as multiplicative factor, b = 1.0 as exponential factor for the basic COCOMO effort equation and c = 3.0 as multiplicative factor, d = 0.33 as exponential factor for the basic COCOMO duration equation, approximately how long does the project take to complete ?
A
11.2 months
B
12.2 months
C
13.2 months
D
10.2 months
       Software-Engineering       COCOMO-Model       UGC NET CS 2017 Jan- paper-3
Question 12 Explanation: 
Given data,
-- lines of code(LOC)= 50,000 (or 50K)
-- Multiplicative value ‘a’=1.4
-- Exponential ‘b’=1.0
-- Basic COCOMO formula= a*(LOC in K)b
-- Multiplicative value ‘c’=3.0
-- Exponential ‘d’=0.33
-- Development=c*(basic COCOMO result)d
Step-1: Basic COCOMO formula= a*(LOC in K)b
= 1.4*(50)1.0
= 70 Step-2: Development= c*(basic COCOMO result)d
= 3(70)0.33
= 12.18 months
Question 13
The number of function points of a proposed system is calculated as 500. Suppose that the system is planned to be developed in Java and the LOC/FP ratio of Java is 50. Estimate the effort (E) required to complete the project using the effort formula of basic COCOMO given below : E = a(KLOC)b Assume that the values of a and b are 2.5 and 1.0 respectively.
A
25 person months
B
75 person months
C
62.5 person months
D
72.5 person months
       Software-Engineering       COCOMO-Model       UGC NET CS 2016 July- paper-3
Question 13 Explanation: 
Given data,

-- Functional points(FP)= 500

-- Lines of code(LOC) / FP = 50

-- Effort(E) = a(KLOC)b

-- a = 2.5 and b = 1.0

-- KLOC=?

Step-1: Find out KLOC

KLOC= ((LOC / FP)*FP)/1000

= 25

Where K=1000

Step-2: Find out Effort(E)= 2.5(25)1.0

= 62.5 person months.

There are 13 questions to complete.
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