April 25, 2022

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREES OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ APPLIED COMPUTING/BUSINESS INFORMATION TECHNOLOGY BIT1302A BUSS208 BAC2105- ECOMMERCE FULLTIME/ PART TIME ORDINARY EXAMINATIONS DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE [30 MARKS] a) i) Describe the term ‘e-commerce. (2 Marks) ii) How does e-commerce decrease costs? Discuss (4 Marks) b) Information processing in e-commerce can involve transactions for information gathering. Discuss any THREE such transactions (6 Marks) c) Describe the following terms as they are applied in the e-commerce environment i) Teleworking ii) Industry value chain iii) Shipping profile iv) Electronic markets (8 Marks) d) Discuss the TWO key pillars that support the e-commerce infrastructure (4 Marks) e) Discuss any THREE e-governance models (6 Marks) QUESTION TWO [20 MARKS] a) Identify any FIVE technical limitations involving electronic buying and selling. (5 Marks) b) Identify and briefly discuss any THREE layers of the EDI architecture. (6 Marks) c) E-commerce applications are made up of elements such as: i) Multimedia contents ii) Client-server architecture iii) Video storage and transmission servers Discuss each of these elements (9 Marks) QUESTION THREE [20 MARKS] a) Define the term “web application servers” and list any FOUR of these servers (6 Marks) b) Identify any FOUR common uses of cookies on a website (4 Marks) c) SLEPT analysis considers five factors affecting the macro-environment. Discuss (10 Marks) QUESTION FOUR [20 MARKS] a) Distinguish between the following terms: i) Personalization and customization ii) Firm and industry iii) EFT and EDI (6 Marks) b) Discuss the management issues that arise during development and implementation of a digital business strategy. (4 Marks) c) Discuss any FIVE factors to be considered when designing an e-commerce site (10 Marks) QUESTION FIVE [20 MARKS] a) E-commerce merchant server software is crucial for running e-business. Required: i) List any THREE functions provided by merchant server software (3 Marks) ii) Discuss the factors to consider when choosing merchant server software (6 Marks) b) Economic analysis can involve studying B2B profiles. Identify THREE factors that ecommerce B2B profiles can include. (3 Marks) c) It is important to collect data about customer activities such as browsing and shopping for marketing purposes and to make strategic decisions. Required: i) Identify FOUR types of customer information that businesses can use (4 Marks) ii) Describe any FOUR ethical issues concerned with protection of personal information (4 Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BUSINESS IT/ APPLIED COMPUTING BIT 1207A/BBIT 107/BAC 1207: DATABASE SYSTEMS PRINCIPLES FULLTIME/ PART TIME/DISTANCE LEARNING DATE: AUGUST 2018 TIME: 2 HOURS Instructions o Answer question ONE and any other TWO. o Question One carry 30 marks, others 20 marks each. QUESTION ONE. (COMPULSORY) (a) Describe Primary and Foreign Keys in RELATIONAL databases (4 Marks) (b) Discuss the five dis-advantages of DBMS (5 Marks) (c) With respect to information management, compare the following concepts; (i) Instance and schema (4 Marks) (ii) Tuple and attribute (4 Marks) (iii) File system and DBMS (4 Marks) (d) There are three default database schemas that found in SQL namely information-schema, MySQL and Test. Discuss each showing its role in DBMS. (6 Marks) (e) Discuss three important database security features. (3 Marks) QUESTION TWO (a) Below is a list of potential entities for a School database; – Employee – Pupil – Class Draw an ERD diagram showing all possible attributes together with PK and FK. (10 Marks) (b) (i) What is data integrity (2 Marks) (ii) What are constraints? Discuss three benefits of constraints (4 Marks) (c) What is a Relational Database? Give two examples. (4 Marks) QUESTION THREE a) i) Define the term ‘SQL’ with reference to database systems (2 Marks) ii) Distinguish between data definition and data manipulation (2 Marks) b) Use the table (STUDENT) below to answer the questions that follow; i. Write SQL statement to create the above table: STUDENT (4 Marks) ii. Write SQL statement to insert data new record number 5. Use your own data (4 Marks) iii. Write SQL statement to change ‘KILONZO’ to ‘KIOKO’ in record 1. (4 Marks) iv. Write SQL statement to list all details for those doing BSC-IT (4 Marks) QUESTION FOUR (a) Discuss normalization. Show why it is important in database design and demonstrate how it is done. Include UNF, 1NF, 2NF and 3NF (10 Marks) (b) Discuss, with the help of a diagrams, the database life cycle. (10 Marks) QUESTION FIVE (a) Discuss three levels of database design. (6 Marks) (b) Write short notes on the following topics: (8 Marks) (i) Data warehouse (ii) Data mining (iii) Client/Server database (iv) Web database (c) Discuss three dependencies’ used during normalization (6 Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BACHELOR OF BUSINESS INFORMATION TECHNOLOGY/ BACHELOR OF SCIENCE IN APPLIED COMPUTING/ BACHELOR SCIENCE IN SOFTWARE DEVELOPMENT BIT 1104A/BCU 100/KCA 003/BAC 1104: BUSINESS COMMUNICATION SKILLS FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question ONE and any other TWO questions QUESTION ONE a) Explain all the components of communication process, (8Marks) b) Differentiate between interpersonal and intrapersonal communication. (2Marks) c) Explain how communication can flow in an organization. (10Marks) d) Describe how technology affects managerial communication. (8Marks) e) Define the term metacommunication. (2Marks) QUESTION TWO a) Explain how managers can facilitate effective one on one communication. (6Marks) b) Describe five types of interviews that a manager may get involved in. (10Marks) c) Explain how managers can use meetings to motivate the employees. (4Marks) QUESTION THREE a) Describe the principles for effective persuasion. (10Marks) b) Explain the steps followed in writing a formal report. (10Marks) QUESTION FOUR a) What is successful communication? Give an example. (6Marks) b) How can a manager improve people’s feeling about their work? (8Marks) c) Explain the barriers created by non- verbal messages. (6Marks) QUESTION FIVE a) Differentiate between formal and informal communication. (4Marks) b) Describe three methods you can employ to improve your reading. (6Marks) c) Explain three benefits of using visual aids. (6Marks) d) Explain the significance of feedback in communication process. (4Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY BIT 4405- EXPERT SYSTEMS DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE a) What kind of mistakes might ES make and why? (4 Marks) b) Why is it easier to correct mistakes in ES than in conventional programs? (2 Marks) c) Identify the generic categories of expert systems applications (12 Marks) d) Describe the motivation for developing expert systems (4 Marks) e) It is said that powerful computers, inference capabilities, and problem-solving heuristics are necessary but not sufficient for solving real problems. Why? (4 Marks) f) Distinguish between forward chaining and backward chaining (4 Marks) QUESTION TWO a) What is the purpose of conducting a Turing test (3 Marks) b) Explain the term inferencing as used in expert systems (3 Marks) c) Given the current status of the Web, discuss how it is changing the availability of ES and how it is being used to embed expertise in other systems. (10 Marks) QUESTION THREE a) Explain the role of a knowledge engineer (4 Marks) b) What are the major activities performed in the ES blackboard (workplace)?(3 Marks) c) Explain the role of the expert systems and their potential benefits. (8 Marks) d) List FIVE major Artificial Intelligence Technologies (5 Marks) QUESTION FOUR a) Define an Expert system (2 Marks) b) What are the major difficulties in developing Expert systems? (4 Marks) c) List the major components of an expert system (10 Marks) d) Define the ES development environment and contrast it with the consultation environment. (4 Marks) QUESTION FIVE a) Why is speech recognition and understanding useful? (4 Marks) b) Distinguish between Expert systems and Decision support systems (4 Marks) c) Describe the major limitations of expert systems (12 Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BACHELOR OF BUSINESS INFORMATION TECHNOLOGY/ BACHELOR OF SCIENCE IN APPLIED COMPUTING BIT 2306/BUSS 107/BAC 1306: ENTREPRENEURSHIP SKILLS FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question ONE and any other TWO questions QUESTION ONE a) Describe the role of entrepreneurship in economic development of a country. (10Marks) b) What are the characteristics for a right climate for innovation? (6Marks) c) Explain how a business can create and sustain competitive advantage. (8Marks) d) What are the steps followed in conducting a marketing research? (6Marks) QUESTION TWO a) In what ways does marketing contribute to new venture success? (6Marks) b) Analyse the factors that a lender should consider prior to giving credit to a borrower. (8Marks) c) Explain the reasons for corporate entrepreneurship. (6Marks) QUESTION THREE a) Using the product life cycle, explain the different ways that an entrepreneur would use to remain competitive in the market. (8Marks) b) Explain briefly the impact of IT in business. (10Marks) c) Define window of opportunity. (2Marks) QUESTION FOUR a) Describe four paths that an individual can follow to become an independent business owner. (12Marks) b) Discuss the factors that make a family business unique. (8Marks) QUESTION FIVE a) Describe the techniques that a business you are familiar with has used to prevent business failure. (10Marks) b) Explain the initiative used by the government to enhance effectiveness of entrepreneurship. (10Marks)

UNIVERSITY EXAMINATIONS: 2018/2019 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY BIT 2305: ICT PROJECT MANAGEMENT/ BBIT 204: IT PROJECT MANAGEMENT/BAC FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE (Compulsory) a) The success of an IT project is often judged on its closeness to the originally agreed scope, cost and duration. i) What is the difference between project and business success? (2 Marks) ii) Give THREE common project success criteria (3Marks) b) Suggest TWO reasons why it is considered that accurate estimating for IS projects is difficult. (4Marks) c) Explain how you would use a Work Breakdown Structure to develop an estimate showing effort and cost, for a Project. (4 Marks) d) Describe FOUR differences between “management” and “leadership”. (4Marks) e) If the scope of a project increases, what decisions would a project manager have to consider about the other elements of the Project Triangle? (4Marks) f) The constraints governing the jobs are as fo1lows: A and B are start jobs; A controls C, D and E; B controls F and J; G depends upon C; H depends on D; E and F control I and L; K follows J; L is also controlled by K; G, H, I and L are the last jobs. Draw the network, (6 Marks) g) Define the term project management (1 Mark) h) Why do we carry out monitoring and control on a project? (2 Marks) QUESTION TWO a) Describe THREE warning signs that might indicate to the project manager that there may be potential problems with the project team. (6 Marks) b) Using an example briefly explain the concept of project crashing (2 Marks) c) Describe the importance of the following in project management (12 Marks) i)Software quality assurance ii) Software risk management iii) Software configuration management iv) Supplier management QUESTION THREE a) i) Construct the project network and calculate the forward and backward pass. (5Marks) ii) Find the expected duration and the variance of each activity. (8 Marks) iii) Find the critical path and the expected project completion time. (2 Marks) b) Compare and contrast network techniques and Gantt charts (5 Marks) QUESTION FOUR a) At a given point in a project, the budgeted cost of work performed was £250,000, the actual cost of work performed was £370,000 and the budgeted cost of work scheduled was £225,000. i) What would be the schedule variance? (3 Marks) ii) What would be the cost variance? (3 Marks) iii) Briefly explain the purpose of performing the above calculations. (4 Marks) a) There is a marketing-research project containing a focus group interview and a questionnaire survey with 200 responders. The survey is based on the analysis of the focus group results. For the focus we have to gather the participants (7 days), organize the event (place, time, equipment etc. – 2 days), implement the interview (1 day), record the interview (2 days), analyse it (3 days) and write a brief research report for the client/sponsor (1 day).For the survey we have to construct the questionnaire (2 days),test and modify it (1 day), do the sampling (2 day), train the interviewers (1 day), fieldwork (2 days), record the data (1 day), analyse the data (2 days) and write the final study (3 days). The project manager wants to keep a 5 days buffer time for safety at the end of the project. i) Draw a work breakdown structure (5 Marks) ii) Formulate a statement of work from the description (5 Marks) QUESTION FIVE a) You have been appointed as project manager for a successful company creating online training courses. The software infrastructure for the company is crucial to its future growth. Until recently the company has outsourced its software development work to a number of consultants. Your appointment represents a decision to carry out all future development in-house. You have been asked to recruit four other people to create a team that will be responsible for identifying business opportunities and developing the IT infrastructure to support the company. Identify a role for EACH of the FOUR people you will recruit. This will include a job title, a brief description of the role and the skills required to fulfil it (10 Marks) b) Using examples, explain the project management techniques that could be used to: (6 Marks) record the activities required for a given IT project and how they are broken down; record the dependencies between the activities required for a given IT project, and how such relationships affect the overall timescale of a project; record the schedule of activities for an IT project and the staff resources required to undertake such activities. c) Describe the purpose of the following activities in project management (4 Marks) i. Communication management ii. Conflict management

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BACHELOR OF BUSINESS IN INFORMATION TECHNOLOGY BIT 2303/BBIT 305: DISTRIBUTED SYSTEMS FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE: 30 MARKS a) List and explain three differences between loosely coupled systems and tightly coupled systems. Use diagrams to explain your answer. (6 Marks) b) Explain the following forms of transparency (4 Marks) i. Access ii. Scalability c) Describe any three desirable features of a message passing system. (6 Marks) d) With the help of a diagram explain what is a middleware giving its functions.(6 Marks) e) Describe the term dependability, explaining four requirements for dependability. (6 Marks) f) Explaining the meaning of the term ‘remote method invocation (RMI)’ (2 Marks) QUESTION TWO: 20 MARKS a) State and describe five importance of IPC (inter-process communication) (5 Marks) b) With the help of a clearly labeled diagram, explain the elements of RPC. (8 Marks) c) Explain the following replication approaches. (7 Marks) i. Active replication ii. Passive replication QUESTION THREE (20 MARKS) a). Briefly explain the meaning of the following terms a) Distributed system (1 Mark) b) Remote procedure call (1 Mark) c) Binding (1 Mark) b) Briefly explain any three types of middle ware models (3 Marks) c) Describe any four characteristics of distribution system (4 Marks) d). State and explain two concurrency problems in distributed systems (4 Marks) e) There various design approaches that have been suggested for building dependable distributed systems that exhibit a high level of stability and fault tolerance. Describe any three of these approaches (3 Marks) f) Briefly explain three categories of faults that can occur in a distributed system (3 Marks) QUESTION FOUR (20 MARKS) a) Using examples, explain the following terms in the context of parallel and distributed systems. i) Mutual exclusion (2 Marks) ii) Dependability (2 Marks) iii) Availability (2 Marks) iv) Dead lock (2 Marks) b) Describe using diagrams three algorithms for achieving mutual exclusion (6 Marks) c) Differentiate between shared and write locks as used in concurrency control (4 Marks) c) There are various strategies of handling deadlocks. Outline any four of these strategies d) Briefly explain what you understand by ‘file replication’ (2 Marks) QUESTION FIVE (20 MARKS) a) Fundamental models are concerned with description of properties that are common in all of the architectural models. Describe three main fundamental models. (3 Marks) b) Distributed file system typically provides three types of services. Each can be thought of as a component of a distributed file system. State and explain each of these services (3 Marks) b) State and explain four features of a good distributed file system (4 Marks) c) Security goals of a any computer system are decided by its security policies. State and explain three computer security goals that can be set in a distributed system (3 Marks) d) There for types of security threats to consider when designing and implement any distributed system (4 Marks) e). Describe three techniques that can be employed to implement a scalable and fault tolerant directory service (3 Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREES OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ APPLIED COMPUTING BIT 2301 A/ BAC 3206: COMPUTER GRAPHICS FULLTIME/ PART TIME ORDINARY EXAMINATIONS DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE [30 MARKS] a) Computer graphics comprises THREE basic elements. Explain each of them. (6 Marks) b) Explain the operation of the cathode ray tube. (4 Marks) c) Describe the following primitives used in computer graphics: i) Vertex (1 Mark) ii) Line (1 Mark) iii) Face (1 Mark) d) Explain how the raster scan is used to display objects on the screen. (4 Marks) e) Describe any FOUR factors in a typical illumination model. (4 Marks) f) The A-buffer expands on the depth buffer method to allow transparencies. Required: i) Identify the key data structure used by the A-buffer method (1 Mark) ii) Describe the TWO fields used by the A- buffer (4 Marks) iii) The surface buffer in the A-buffer includes several components, name any FOUR of these components (4 Marks) QUESTION TWO [20 MARKS] a) Explain and illustrate the following terms related to 2D viewing: i) Window ii) Viewport (6 Marks) b) Discuss any TWO day-to-day graphics operations that result in transformations between the window and viewport. (4 Marks) c) Identify and briefly discuss ONE approach to each of the following forms of 2D clipping: i) Line clipping (2 Marks) ii) Fill-area clipping (2 Marks) iii) Text clipping (2 Marks) d) Discuss the ‘back-face-detection’ method of hidden surface elimination. (4 Marks) QUESTION THREE [20 MARKS] a) Describe the following graphics display terms: (6 Marks) i) Mirror line ii) DAC iii) Aliasing b) The digital differential analyzer is the simplest line drawing algorithm, but has TWO key limitations. Briefly discuss these limitations. (2 Marks) c) Apply the Bresenham line drawing algorithm to discover the intermediate points between the following sets of points: i) (5,8) and (16,13) (4 Marks) ii) (2,5) and (5,11) (4 Marks) iii) (4,3) and (12,8) (4 Marks) QUESTION FOUR [20 MARKS] a) During illumination, computer graphics considers THREE kinds of surfaces: i) Specular surface ii) Diffuse surface iii) Translucent surface Discuss how each of these surfaces interact with light and give examples of each surface. (6 Marks) b) Distinguish between global and local illumination and draw a diagram to illustrate each type. (4 Marks) c) Consider the shape below that needs to be clipped using the Sutherland-Hodgman algorithm. Illustrate the clipping process clearly showing the steps, and present the clipped hexagon with its new set of vertices (6 Marks) d) Describe any TWO shading models. (4 Marks) QUESTION FIVE [20 MARKS] a) Consider a polygon with the vertices (1,5) (1,2) (3,1) (5,7) (6,5) (1,5). Showing all your calculations, calculate and plot the new vertices after it has undergone the following transformations on a 2D plane: i) A translation of (3,-6) (3 Marks) ii) A scaling of (0.5,2) (3 Marks) iii) A rotation of 90ᵒ clockwise about the origin (3 Marks) Plot the original and transformed polygons on a Cartesian plane. (4 Marks) b) Describe FOUR conditions that must be met for a point NOT to be clipped. (4 Marks) c) Discuss the ‘rendering equation’ and its associated problem. (3 Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BACHELOR OF BUSINESS IN INFORMATION TECHNOLOGY BIT 2209: RESEARCH SKILLS & DESIGN KCA 300: RESEARCH METHODOLOGY FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE: 30 MARKS (COMPULSORY) a) Define the following terms 4 Marks i. Research problem ii. Research design iii. Plagiarism iv. Hypothesis b) Describe the following documents 4 Marks i. Research proposal ii. Research report c) Explain why it is wrong to set out to prove or disapprove a hypothesis. 2 Marks a) Describe four attributes of good research 4 Marks d) Discuss any four purposes served by research 4 Marks e) List any two open source software for each of the following 2 Marks i. Anti-plagiarism ii. Citing and referencing f) Read and understand the frequency table below, then answer the questions that follow Score (x) Frequency (f) 30                  3 40                 3 45                 2 50                 6 60                2 80                3 90                1 Required: i. Complete the table so that you will be able to do part (ii) through (iv) 4 Marks ii. Calculate the mean 2 Marks iii. Calculate the variance 2 Marks iv. Calculate the standard deviation 2 Marks QUESTION TWO: 20 MARKS g) Suppose you are having problems identifying a research problem. State and explain four areas where you would look around to get started. 4 Marks h) Discuss six guidelines that you would follow when in order to come up with a legitimate research problem. 6 Marks e) The following are data observed in a certain attained in a research methods test distribution 31 21 34 32 50 31 22 44 47 76 56 76 72 80 93 66 64 60 65 23 45 56 77 66 55 37 87 92 37 44 33 47 58 64 48 88 82 85 33 51 67 95 55 54 39 77 82 36 44 27 Required: i. Group the scores in classes of width 10. 2 Marks Complete the table such that you will be able to draw the histogram and the frequency polygon 8 Marks QUESTION THREE: 20 MARKS No research effort is complete without a careful and exhaustive review of the material related to the topic under study. With that fact in mind answer the following questions. a) Define the term literature review 2 Marks b) State and explain five reasons why it is important to carry out the literature review. 5 Marks c) Discuss four indicators of an adequate scope of the reviewed literature. 8 Marks d) Discuss five sources of literature that you are likely to contact when reviewing your literature. 5 Marks QUESTION FOUR: 20 MARKS a) Define the following terms commonly used in the research design context. 4 Marks i. Population ii. Sample b) Briefly discuss the following sampling techniques 4 Marks i. Random sampling ii. Stratified sampling c) Discuss the general criteria for any research design irrespective of the branch of research. 4 Marks d) Describe the various forms of validity of measuring tools 4 Marks e) Describe the various forms of reliability of measuring tools 4 Marks QUESTION FIVE: 20 MARKS a) Differentiate between the following types of research i. Qualitative Vs quantitative research 2 Marks ii. Basic Vs Applied research 2 Marks b) Describe the main sections in research proposal 5 Marks c) Define the term data interpretation 2 Marks d) In your own view what do you think is the significance of interpreting data? 4 Marks e) Describe the interview method of data collection as well as the tools used in this method 5 Marks

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/BACHELOR OF BUSINESS INFORMATION TECHNOLOGY/BACHELOR OFINFORMATION COMMUNICATION TECHNOLOGY/BACHELOR OF SCIENCE APPLIED COMPUTING BIT 2204A/BBIT 310/BAC 2201: JAVA PROGRAMMING FULL TIME/PART TIME/DISTANCE LEARNING DATE: JULY/AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE a) Explain the two types of errors encountered in java 4 Marks b) Explain the five operators found in java 5 Marks c) Using a flowchart explain the phrase decision control structures 5 Marks d) Write a Java program that determines a student’s grade. 8 Marks The program will read three types of scores(quiz, mid-term, and final scores) and determine the grade based on the following rules: -if the average score >=90% =>grade=A -if the average score >= 70% and <90% => grade=B -if the average score>=50% and <70% =>grade=C -if the average score<50% =>grade=F e) Explain the properties of a constructor 5 Marks f) Outline three characteristics of java methods 3 Marks QUESTION TWO a) What is wrong with the following interface? (2 Marks) public interface SomethingIsWrong { void aMethod(int aValue) { System.out.println(“Hi Mom”); } } b) Fix the interface in Question 2a. (3 Marks) c) Is the following interface valid? (2 Marks) public interface Marker { } d) Which should you use, abstract classes or interfaces? discuss (6 Marks) e) Write a Java program to reverse an array of integer values (7 Marks) QUESTION THREE a) Write a Java method to compute the future investment value at a given interest rate for a specified number of years (8 Marks) Sample data (Monthly compounded) and Output: Input the investment amount: 1000 Input the rate of interest: 10 Input number of years: 5 Expected Output: Years FutureValue 1 1104.71 2 1220.39 3 1348.18 4 1489.35 5 1645.31 b) Explain how Overriding and Hiding Methods are implemented (6 Marks) c) Given the following class, called NumberHolder, write some code that creates an instance of the class, initializes its two member variables, and then displays the value of each member variable. (6 Marks) public class NumberHolder { public int anInt; public float aFloat; } QUESTION FOUR a) Briefly explain the following terms in the context Java programming. Write a sample java code statement for each case i) Concatenating operator (2 Marks) ii) Array (2 Marks) iii) Class (2 Marks) iv) method (2Marks) b) State and explain four features of java programming language (4 Marks) c) Write a java class named Items_discount that request the user to enter the cost of at least two item and computes discount to be awarded. The discount is set 8% of all purchased items (4 Marks). d) Briefly explain the purpose of using a constructor () method as used in java programming (2 Marks) e) Write a java class that calculates perimeter of a rectangle and print results (2 Marks) QUESTION FIVE a) Describe the importance of java compiler in the context of java programming (2 Marks) b) Describe the following java programming terms. Write java sample code that demonstrate implementation of each term (6 Marks) i) Repetition structure ii) main () method iii) Decision structure c) Briefly explain for-loop in the context of java programming. Write a sample java programming code that demonstrates its usage (4 Marks) d) Write a well commented java class that prompts the user to enter two numbers and determines which among the two numbers is larger before printing it. (4 Marks). e) Describe the difference between do-while loop and while loop. Write a sample code for each loop to illustrate your answer (4 Marks).

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BACHELOR OF INFORMATION & COMMUNICATION TECHNOLOGY/ BACHELOR OF BUSINESS INFORMATION TECHNOLOGY BIT 2203, BBIT 210, BCT 2205:STRATEGIC MANAGEMENT INFORMATION SYSTEMS FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE [30 MARKS] a) Define an information systems from both a technical and a business perspective (4 Marks) b) Describe the organizational, management, and technology dimensions of information systems. (6 Marks) c) Briefly explain FOUR characteristics of a business model (4 Marks) d) Explain types of feasibility an organization can do and their advantages. (4 Marks) e) Define Strategic Management and name at least THREE benefits of strategic management (4 Marks) f) Discuss at least 6 types of planning that can be used by a manager in an organization giving their benefits. (8 Marks) QUESTION TWO [20 MARKS] a) Briefly write notes on the following terms as used in Information system (15 Marks) i) Interactive marketing ii) Enterprise Resource Planning iii) Customer Relationship Management iv) Re-engineering v) Work Group support b) Explain FIVE difficulties a firm may encounter when pursuing an international strategy and how it can overcome each. (5 Marks) QUESTION THREE [20 MARKS] c) How do SWOT Analysis help managers in the strategic decision making process? (5 Marks) d) Discuss THREE Techniques that are used in analyzing the internal environment of an organization (15 Marks) QUESTION FOUR [20 MARKS] a) You have recently been employed by an expanding supermarket in Kenya as a strategy advisor. Your main role involves researching the competitive dynamics of the industry and advising the company on the nature of the competition and whether expansion is a viable option or not. Using Porter’s FIVE forces framework, evaluate the use of the model as a method for evaluating the competitive environment, giving examples to support your answer. (15 Marks) b) Outline in your opinion, the key success factors for the retail industry in Kenya. (5 Marks) QUESTION FIVE [20 MARKS] a) Strategy formulation is a key element of strategic management process. Evaluate the statements here-below clearly indicating whether they are True or False. i) Divesting a major product line or market in an organization can be termed as retrenchment policy. ii) Concentric diversification is essentially an unrelated diversification iii) Turnaround strategy is used by firms that are planning to expand. iv) Mergers and Amalgamations do not necessary indicate a growth strategy (2 Marks each) b) Explain the importance of systems documentation at each of the following stages of the systems development life cycle. i) Requirements analysis ii) Systems testing iii) Systems operations iv) Systems Maintenance (8 Marks) c) Discuss four aspects of access control of data and information systems (4 Marks)

UNIVERSITY EXAMINATIONS: 2017/2018 EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY/ BACHELOR OF BUSINESS IN INFORMATION TECHNOLOGY BIT 2201/BBIT 308: SIMULATION AND MODELING FULL TIME/PART TIME/DISTANCE LEARNING DATE: AUGUST, 2018 TIME: 2 HOURS INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions. QUESTION ONE: 30 MARKS (COMPULSORY) a) Define the terms verification and validation in the context of modeling. 4 Marks a) Using the Linear Congruential Generator (LCG) with a=5, m=16, c=3 and seed Z0 = 7 to generate the first six random variates on [0,1]. 6 Marks b) Using appropriate examples identify four main types of systems. 6 Marks c) Simulation models are not the only models that can be used for understanding and improving the real world. There exist other modeling approaches. Why would simulation be used in preference to these other modeling approaches? 6 Marks d) With the help of well labeled diagrams illustrate and describe the four types of queues that exist giving common place examples. 8 Marks QUESTION TWO: 20 MARKS a) Describe five common statistics included in the output report of a simulation programming system. ` 10 Marks The table below shows the probability distribution of a barges arriver per day at a port. The unloading rate per day follows the probability distribution given below. NB: unloading is done on FCFS basis. Suppose the following are the random numbers of arrivals and random numbers of unloading. Arrival Random No. 53, 07, 51, 82, 50, 35, 12, 57, 99, 27, 56, 93, 35, 34, 00, 22, 31 Unload Random No. 35, 66, 38, 12, 54, 75, 34, 05, 19, 70, 64, 85 90, 73, 59 61, 43 Required: determine: simulate a seventeen day analysis and determine: i. The average number of barges delayed 4 Marks ii. The average number of arrivals per day 3 Marks iii. The average number of barges offloaded each day 3 Marks QUESTION THREE: 20 MARKS a) Dynamic systems have a state that is ever changing as a result of changes in state variables. In your own understanding and using examples from the banking system; describe the terms system, system state, and state variables. 6 Marks b) Discuss the two short comings of the mid-square method as generator of random numbers. 4 Marks c) Not all simulation and modeling exercises are a success. Discuss five common pitfalls to successful simulation. 5 Marks d) Describe the factors that should be considered in selecting a simulation language. 5 Marks QUESTION FOUR: 20 MARKS a) State and briefly explain four properties of a good arithmetic random number generator. 4 Marks b) Consider a single- server queuing system represented by the graph below. The first in first out queuing discipline is followed. Time is in minutes. Required: i) Find the average delay in the waiting line (d) 4 Marks ii) Find the average number of clients in the waiting line (q) 6 Marks iii) Find the expected utilization of server (u) 3 Marks iv) Draw the time line of events 3 Marks QUESTION FIVE: 20 MARKS a) Differentiate between the following types of models 4 Marks i. Deterministic Vs Stochastic Models ii. Discrete Models Vs Continuous Models b) Describe all the components found in most discrete event simulation models. 10 Marks c) Using the mid- square method obtain the first six random variables using Z0= 7182 6 Marks