Pass CSSLP Exam Guide

In the waterfall model, software development can be managed if the developers are limited to go back only one stage to rework. If this limitation is not imposed mainly on a large project with several team members, then any developer can be working on any phase at any time, and the required rework might be accomplished several times. Answer: B is incorrect. The spiral model is a software development process combining elements of both design and prototyping-in- stages, in an effort to combine advantages of top-down and bottom-up concepts. The basic principles of the spiral model are as follows: The focus is on risk assessment and minimizing project risks by breaking a project into smaller segments and providing more ease-of- change during the development process, as well as providing the opportunity to evaluate risks and weigh consideration of project continuation throughout the life cycle. Each cycle involves a progression through the same sequence of steps, for each portion of the product and for each of its levels of elaboration, from an overall concept-of-operation document down to the coding of each individual program. Each trip around the spiral traverses the following four basic quadrants: Determine objectives, alternatives, and constraints of the iteration. Evaluate alternatives, and identify and resolve risks. Develop and verify deliverables from the iteration. Plan the next iteration.

Begin each cycle with an identification of stakeholders and their win conditions, and end each cycle with review and commitment. Answer: D is incorrect. The Prototyping model is a systems development method (SDM). In this model, a prototype is created, tested, and then reworked as necessary until an adequate prototype is finally achieved from which the complete system or product can now be developed. Answer: C is incorrect. Rapid Application Development (RAD) refers to a type of software development methodology that uses minimal planning in favor of rapid prototyping.

The elements of security are as follows: 1.Confidentiality: It is the concealment of information or resources. 2.Authenticity: It is the identification and assurance of the origin of information. 3.Integrity: It refers to the trustworthiness of data or resources in terms of preventing improper and unauthorized changes. 4.Availability: It refers to the ability to use the information or resources as desired.

Graybox testing is a combination of whitebox testing and blackbox testing. In graybox testing, the test engineer is equipped with the knowledge of system and designs test cases or test data based on system knowledge. The security tester typically performs graybox testing to find vulnerabilities in software and network system. Answer: C is incorrect. Whitebox testing is a testing technique in which an organization provides full knowledge about the infrastructure to the testing team. The information, provided by the organization, often includes network diagrams, source codes, and IP addressing information of the infrastructure to be tested. Answer: A is incorrect. Integration testing is a logical extension of unit testing. It is performed to identify the problems that occur when two or more units are combined into a component. During integration testing, a developer combines two units that have already been tested into a component, and tests the interface between the two units. Although integration testing can be performed in various ways, the following three approaches are generally used: The top-down approach The bottom-up approach The umbrella approach Answer: B is incorrect. Regression testing can be performed any time when a program needs to be modified either to add a feature or to fix an error. It is a process of repeating Unit testing and Integration testing whenever existing tests need to be performed again along with the new tests. Regression testing is performed to ensure that no existing errors reappear, and no new errors are introduced.

The configuration status accounting procedure is the ability to record and report on the configuration baselines associated with each configuration item at any moment of time. It supports the functional and physical attributes of software at various points in time, and performs systematic control of accounting to the identified attributes for the purpose of maintaining software integrity and traceability throughout the software development life cycle. The configuration status and accounting process keeps track of the changes so that the latest acceptable configuration specifications are readily available. Answer: C is incorrect. The verification and audit processes seek to establish a high level of confidence in how well the Configuration Management activity is working. Answer: A is incorrect. Configuration control is a procedure of the Configuration management. Configuration control is a set of processes and approval stages required to change a configuration item's attributes and to re-baseline them. It supports the change of the functional and physical attributes of software at various points in time, and performs systematic control of changes to the identified attributes. Answer: D is incorrect. Configuration identification is the process of identifying the attributes that define every aspect of a configuration item. A configuration item is a product (hardware and/or software) that has an end-user purpose. These attributes are recorded in configuration documentation and baselined. Baselining an attribute forces formal configuration change control processes to be effected in the event that these attributes are changed.