What are the assumptions of the execution-time component model? Compare the execution-time component for basic model and the logarithmic Poisson model.

What are the assumptions of the execution-time component model? Compare the execution-time component for basic model and the logarithmic Poisson model.
by

1 Answer

Answer :

Ans. The execution-time component is based on the following assumptions: (1) Tests represent the environment in which the program will be used. (2) All failures are observed. (3) Failure intervals are s-independent of each other. (4) Hazard rate is a constant that changes at each fault correction. (5) The failure rate is proportional to the s-expected value of the number of faults remaining. (6) The fault-correction occurrence rate is proportional to the failure-occurrence rate. Both rates are with respect to execution time. The two models-basic execution time model and logarithmic Poisson execution time model- have failure intensity functions that differ as functions of execution time. However, the difference between them is best defined in terms of slope or decrement per failure experienced. The decrement in the failure intensity function remains constant for basic model while the decrement per failure decreases exponentially as shown in the following graph.
by

Related questions

Compare the basic COCOMO model with the detailed COCOMO model .

Description : Compare the basic COCOMO model with the detailed COCOMO model .

Last Answer : Ans. COCOMO consists of a hierarchy of three increasingly detailed and accurate forms. Basic COCOMO - is a static single-valued model that computes software development effort (and cost) as a ... cost driver's impact on each step (analysis, design, etc.) of the software engineering process.

The model that assumes that effort and development time are functions of product size alone is (A) Basic COCOMO model (B) Intermediate COCOMO model (C) Detailed COCOMO model (D) All the three COCOMO models

Description : The model that assumes that effort and development time are functions of product size alone is (A) Basic COCOMO model (B) Intermediate COCOMO model (C) Detailed COCOMO model (D) All the three COCOMO models

Last Answer : (A) Basic COCOMO model

Compare and contrast reliability and availability?

Description : Compare and contrast reliability and availability?

Last Answer : Ans. Reliability:The probability of failure-free system operation over a specified time in a given environment for a given purpose is called reliability Availability:The probability that a system, at ... damage data, low reliability may not be a problem. Availability takes repair time into account.

What is CMM? Describe its levels & compare it with ISO 9001?

Description : What is CMM? Describe its levels & compare it with ISO 9001?

Last Answer : Ans. CAPABILITY MATURITY MODEL (CMM): CMM is a strategy for improving the software process, irrespective of the actual life cycle model used. Software Engineering Institute (SEI) of Carnegie- ... in the CMM are called out in the auditing practices of the verifying implementation common feature.

Explain Equivalence Class Partitioning and Boundary value analysis. Compare the two.

Description : Explain Equivalence Class Partitioning and Boundary value analysis. Compare the two.

Last Answer : Ans. Equivalence Class Partitioning: It is a technique in black box testing. It is designed to minimize the number of test cases by dividing tests in such a way that the system is expected to act the ... valid data equivalence class, then you can select test case values like: 1, 11, 100, 950 etc.

What is Data Dictionary? Explain each component?

Description : What is Data Dictionary? Explain each component?

Last Answer : Ans Data dictionary is a storehouse of data giving information about data. It is a list of terms and their definition for all data items and data files of a system. A data dictionary contains ... Data Stores- data Flows are data structures in motion whereas data stores are data structures at rest.

Software deteriorates rather than wears out because (A) software suffers from exposure to hostile environments. (B) defects are more likely to arise after software has been used often. (C) multiple change requests introduce errors in component interactions. (D) software spare parts become harder to order.

Description : Software deteriorates rather than wears out because (A) software suffers from exposure to hostile environments. (B) defects are more likely to arise after software has been used often. ( ... requests introduce errors in component interactions. (D) software spare parts become harder to order.

Last Answer : (B) defects are more likely to arise after software has been used often.

CASE Tool is (A) Computer Aided Software Engineering (B) Component Aided Software Engineering (C) Constructive Aided Software Engineering (D) Computer Analysis Software Engineering

Description : CASE Tool is (A) Computer Aided Software Engineering (B) Component Aided Software Engineering (C) Constructive Aided Software Engineering (D) Computer Analysis Software Engineering

Last Answer : (A) Computer Aided Software Engineering

Explain incremental model? Define core product and detailed plan.

Description : Explain incremental model? Define core product and detailed plan.

Last Answer : Ans. The incremental model is proposed by D.L PARNAS. It is basically implemented by combining elements of linear sequential model and iterative prototyping model. Incremental development refer to the process ... . Risk of failure of product is decreased as user start using the product early.

Spiral model is a realistic approach to the development of large-scale systems & software. Justify & explain the model?

Description : Spiral model is a realistic approach to the development of large-scale systems & software. Justify & explain the model?

Last Answer : Ans. There are several advantages of Spiral model that makes it a realistic approach to development of large-scale systems and software, viz: 1) The spiral model promotes quality assurance ... , which can help in identifying and resolving potential problems or errors in the software development.

Explain the software life cycle model that incorporates risk factor.

Description : Explain the software life cycle model that incorporates risk factor.

Last Answer : Ans. The problem with traditional software process models is that they do not deal sufficiently with the uncertainty, which is inherent to software projects. Important software projects failed ... . The risk analysis and validation steps eliminate errors in the early phases of development

Explain the development phases of the detailed COCOMO model.

Description : Explain the development phases of the detailed COCOMO model.

Last Answer : Ans A software development is carried out in four successive phases, which are as follows: 1: plan/requirements: this is the first phase of the development cycle. The requirement is analyzed, the product ... product. This requires 16% to 34% of normal effort and 18% to 34% of the development time.

Explain the development phases of the detailed COCOMO model.

Description : Explain the development phases of the detailed COCOMO model.

Last Answer : Ans A software development is carried out in four successive phases, which are as follows: 1: plan/requirements: this is the first phase of the development cycle. The requirement is analyzed, the product ... product. This requires 16% to 34% of normal effort and 18% to 34% of the development time.

Describe the various steps of the reuse-oriented model.

Description : Describe the various steps of the reuse-oriented model.

Last Answer : Ans. The reuse-oriented model, also called reuse-oriented development (ROD), is a method of software development in which a program is refined by producing a sequence of prototypes called models, each ... requirements, resulting in a product that does not fully meet the needs of its intended users.

Explain the waterfall model. Explain why it is more advantageous than adhoc methods.

Description : Explain the waterfall model. Explain why it is more advantageous than adhoc methods.

Last Answer : Ans Waterfall Model: 1.The waterfall model is a sequential software development process, in which progress is seen as flowing steadily downwards (like a waterfall) through the phases of Conception, Initiation, ... approach. b. Iteration is not required. c. It is widely use because it is easy.

Define capability. What are the quantities that determine the degree of capability of a software reliability model?

Description : Define capability. What are the quantities that determine the degree of capability of a software reliability model?

Last Answer : Ans: Capability refers to the ability of the model to estimate with satisfactory accuracy quantities needed by managers; engineers and users in planning and managing software development or running ... , expected date of reaching reliability, resource and cost requirements to reach the objectives.

How does the risk factor affect the spiral model of software development?

Description : How does the risk factor affect the spiral model of software development?

Last Answer : Ans:Risk Analysis phase is the most important part of "Spiral Model". In this phase all possible (and available) alternatives, which can help in developing a cost effective project are analyzed ... data and find out possible solution in order to deal with the potential changes in the requirements.

What is the advantage of using prototype software development model instead of waterfall model? Also explain the effect of defining a prototype on the overall cost of the software project?

Description : What is the advantage of using prototype software development model instead of waterfall model? Also explain the effect of defining a prototype on the overall cost of the software project?

Last Answer : Ans:The waterfall model: This is the classic SDLC model, with a linear and sequential method that has goals for each development phase. The waterfall model simplifies task scheduling, because ... acceptable prototype is finally achieved from which the complete system or product can now be developed.

Which of these terms is a level name in the Capability Maturity Model? (A) Ad hoc (B) Repeatable (C) Reusable (D) Organized

Description : Which of these terms is a level name in the Capability Maturity Model? (A) Ad hoc (B) Repeatable (C) Reusable (D) Organized

Last Answer : (C) Reusable

The spiral model of software development (A) Ends with the delivery of the software product (B) Is more chaotic than the incremental model (C) Includes project risks evaluation during each iteration (D) All of the above

Description : The spiral model of software development (A) Ends with the delivery of the software product (B) Is more chaotic than the incremental model (C) Includes project risks evaluation during each iteration (D) All of the above

Last Answer : (C) Includes project risks evaluation during each iteration

Which is the most important feature of spiral model? (A) Quality management (B) Risk management (C) Performance management (D) Efficiency management

Description : Which is the most important feature of spiral model? (A) Quality management (B) Risk management (C) Performance management (D) Efficiency management

Last Answer : (B) Risk management

Requirements can be refined using (A) The waterfall model (B) prototyping model (C) the evolutionary model (D) the spiral model

Description : Requirements can be refined using (A) The waterfall model (B) prototyping model (C) the evolutionary model (D) the spiral model

Last Answer : (B) prototyping model

ER model shows the (A) Static view. (B) Functional view. (C) Dynamic view. (D) All the above.

Description : ER model shows the (A) Static view. (B) Functional view. (C) Dynamic view. (D) All the above.

Last Answer : (A) Static view.

For a well understood data processing application it is best to use (A) The waterfall model (B) prototyping model (C) the evolutionary model (D) the spiral model

Description : For a well understood data processing application it is best to use (A) The waterfall model (B) prototyping model (C) the evolutionary model (D) the spiral model

Last Answer : (A) The waterfall model

In the spiral model ‘risk analysis’ is performed (A) In the first loop (B) in the first and second loop (C) In every loop (D) before using spiral model

Description : In the spiral model ‘risk analysis’ is performed (A) In the first loop (B) in the first and second loop (C) In every loop (D) before using spiral model

Last Answer : (C) In every loop

A COCOMO model is (A) Common Cost Estimation Model. (B) Constructive Cost Estimation Model. (C) Complete Cost Estimation Model. (D) Comprehensive Cost Estimation Model.

Description : A COCOMO model is (A) Common Cost Estimation Model. (B) Constructive Cost Estimation Model. (C) Complete Cost Estimation Model. (D) Comprehensive Cost Estimation Model.

Last Answer : (B) Constructive Cost Estimation Model.

The model in which the requirements are implemented by category is (A) Evolutionary Development Model (B) Waterfall Model (C) Prototyping (D) Iterative Enhancement Model

Description : The model in which the requirements are implemented by category is (A) Evolutionary Development Model (B) Waterfall Model (C) Prototyping (D) Iterative Enhancement Model

Last Answer : (A) Evolutionary Development Model

The most important feature of spiral model is (A) requirement analysis. (B) risk management. (C) quality management. (D) configuration management.

Description : The most important feature of spiral model is (A) requirement analysis. (B) risk management. (C) quality management. (D) configuration management.

Last Answer : (B) risk management.

Software feasibility is based on which of the following (A) business and marketing concerns (B) scope, constraints, market (C) technology, finance, time, resources (D) technical prowess of the developers

Description : Software feasibility is based on which of the following (A) business and marketing concerns (B) scope, constraints, market (C) technology, finance, time, resources (D) technical prowess of the developers

Last Answer : (C) technology, finance, time, resources

A key concept of quality control is that all work products (A) are delivered on time and under budget (B) have complete documentation (C) have measurable specification for process outputs (D) are thoroughly tested before delivery to the customer

Description : A key concept of quality control is that all work products (A) are delivered on time and under budget (B) have complete documentation (C) have measurable specification for process outputs (D) are thoroughly tested before delivery to the customer

Last Answer : (C) have measurable specification for process outputs

All activities lying on critical path have slack time equal to (A) 0 (B) 1 (C) 2 (D) None of above

Description : All activities lying on critical path have slack time equal to (A) 0 (B) 1 (C) 2 (D) None of above

Last Answer : (A) 0

Each time a defect gets detected and fixed, the reliability of a software product (A) increases. (B) decreases. (C) remains constant. (D) cannot say anything.

Description : Each time a defect gets detected and fixed, the reliability of a software product (A) increases. (B) decreases. (C) remains constant. (D) cannot say anything.

Last Answer : (A) increases.

Software project planning entails what activities? What are the difficulties faced in measuring the Software Costs?

Description : Software project planning entails what activities? What are the difficulties faced in measuring the Software Costs?

Last Answer : Ans. Software project planning entails the following activities: Estimation: o -Effort, cost, resource, and project duration Project scheduling: Staff organization: o -staffing ... actual specifications of the system hence cost estimations based on uncertain information cannot be accurate.

Draw the flow chart of Risk Management-Activity and explain various Software risks.

Description : Draw the flow chart of Risk Management-Activity and explain various Software risks.

Last Answer : Ans RISK is a problem that could cause some loss or threatens the success of the project, but which has not happened yet. Typical Software Risks:- 1. Dependencies: -Many ... Inadequate application domain experience. New technologies. Ineffective, poorly documented, or neglected processes.

What specific languages can be used in SRS? What are the advantages of using these specific languages of SRS?

Description : What specific languages can be used in SRS? What are the advantages of using these specific languages of SRS?

Last Answer : Ans. Requirement specification necessitates the use of some specification language. The language should support the desired qualities of the SRS- modifiability, understandability, unambiguous, and so forth. ... formally specify the behavior of a system on different combination of input or settings.

Explain various types of static and dynamic testing tools.

Description : Explain various types of static and dynamic testing tools.

Last Answer : Ans. Static testing tools: 1. Static analysers A static analyser operates from a pre-computed database of descriptive information derived from the source text of the program. The idea of a static ... for documenting that the tests have been done and that no defects were found during the process.

How is cyclomatic complexity useful in program test? What is sequence of testing? What is testability?

Description : How is cyclomatic complexity useful in program test? What is sequence of testing? What is testability?

Last Answer : Ans. Cyclomatic complexity measures the amount of decision logic in a single software module. It is used for two related purposes in the structured testing methodology. First, it gives the number of ... a lack of testability may hinder testing parts of the software or software requirements at all.

Design black box test suits for a function that checks whether a character or string upto ten characters in a palindrome?

Description : Design black box test suits for a function that checks whether a character or string upto ten characters in a palindrome?

Last Answer : Ans Following may be the test cases: - Try with Even number of characters (MALAYALAM) - Try with Odd number of characters (ADDA) - Try with maximum length of string The following are negative test ... come for the following) - Try with empty string - Try with numbers - Try with special characters

Explain various Object Oriented concepts used in Software Engineering. Give an example.

Description : Explain various Object Oriented concepts used in Software Engineering. Give an example.

Last Answer : Ans .Various concepts of Object Oriented concepts used in Software Engineering: Object:- An object is something which is capable of being seen, touched or sensed. Each object has certain distinctions ... . A message can be sent between two objects only if they have an association between them.

Define cohesion & coupling? Give suitable examples.

Description : Define cohesion & coupling? Give suitable examples.

Last Answer : Ans Coupling:Coupling refers to the strength of the relationship between modules in a system. Coupling represents how strongly different modules are interconnected with each other. Cohesion: Cohesion ... Cohesion represents how strongly the internal elements of a module are bound to each other.

What is Data Binding?

Description : What is Data Binding?

Last Answer : Ans.The matrix that attempts to capture the module-level concept of coupling is data binding. Data binding are a measure that captures the data interaction across portions of a software system. In ... words, data binding try to specify how strongly coupled different modules in a software system are.

What is function point? Explain its importance. What is function-oriented metrics?

Description : What is function point? Explain its importance. What is function-oriented metrics?

Last Answer : Ans. Function point measures the functionality from the user point of view, that is, on the basis of what the user request and receives in return. Therefore, it deals with ... empirical relationship based on countable measures of software's information domain and assessments of software complexity.

Explain acceptance testing and beta testing.

Description : Explain acceptance testing and beta testing.

Last Answer : Ans. Acceptance Testing and Beta testing:System tests are designed to validate a fully developed system to assure that it meets its requirements. Acceptance and beta testing are form of system ... testing performed by the cutomer to determine whether he should accept the delivery of the system.

Discuss the problems faced during software maintenance

Description : Discuss the problems faced during software maintenance

Last Answer : Ans. Problems During Maintenance The most important problem during maintenance is that before correcting or modifying a program, the programmer must first understand it. Then, the programmer ... be very difficult. Therefore approach of development should be the production of maintainable software.

Explain the concept of bottom-up, top-down and hybrid design.

Description : Explain the concept of bottom-up, top-down and hybrid design.

Last Answer : Ans: Bottom up design:This approach leads to a style of design where we decide how to combine these modules to provide larger ones; to combine those to provide even larger ones, ... approaches are often not practical therefore hybrid approach which combines the above two approaches is often used.

Why is good design important for a product?

Description : Why is good design important for a product?

Last Answer : Ans: A good design is the key to successful product. Almost 2000 years ago a Roman Architect recorded the following attributes of a good design:  Durability  Utility and  Charm A well-designed system is easy to implement, understandable and reliable and allows for smooth evolution.

Define the following terms: (i) Product metrics (ii) Live variables (iii) FAN IN

Description : Define the following terms: (i) Product metrics (ii) Live variables (iii) FAN IN

Last Answer : Ans: (i) Product metrics: describe the characteristics of the product such as size, complexity, design features, performance, efficiency, reliability, portability, etc. (ii) A variable is live from its first ... count of the number of other Components that can call, or pass control, to Component A.

List any three characteristics of a good SRS.

Description : List any three characteristics of a good SRS.

Last Answer : Ans:The SRS should be: Correct , Unambiguous, Complete 1. Correct: An SRS is correct iff every requirement stated therein is one that the software shall meet . 2. Unambiguous: An SRS is ... full labels and references to all figures and diagram and definition of all terms and units of measures

Explain any two requirement elicitation methods.

Description : Explain any two requirement elicitation methods.

Last Answer : Ans. Interviews: After receiving the problem statement from the customer, the first step is to arrange a meeting with the customer. During the meeting or interview, both the parties would like to ... -Board, flip chart, worksheets, wall stickiest, etc. Participants should not criticize or debate.

Discuss any two software characteristics.

Description : Discuss any two software characteristics.

Last Answer : Ans.Software is not manufactured: The life of a software is from concept exploration to the retirement of the software product. It is one time development effort and continuous maintenance effort in order ... this characteristic may be the best and may help us to accommodate any kind of change.