April 13, 2022

UNIVERSITY EXAMINATIONS: 2015/2016 STAGE III ORDINARY EXAMINATION FOR THE DIPLOMA IN BUSINESS MANAGEMENT DMS 103 COMPUTER APPLICATIONS SOFTWARE (DISTANCE LEARNING) DATE: AUGUST, 2016 TIME: 1 ½ Hours INSTRUCTIONS: Answer Any Three Question. QUESTION ONE: [20 MARKS] a). A data bank is a large repository of data on a particular topic, sometimes formed from more than one database, and accessible by many users. Discuss any THREE uses of data bank in a training institution e.g. a school. [6 Marks] b). A password is a string of characters used for user authentication to prove identity or access approval to gain access to a resource which should be kept secret from those not allowed access. Describe TWO types of passwords. [4 Marks] c). A screensaver is a computer application that blanks the screen or fills it with moving images or patterns when the computer is not in use. In this regard, describe any three uses of a screensaver. [6 Marks] d). Briefly describe FOUR types of application software you know. [4 Marks] QUESTION TWO [20 MARKS] a). A disruptive technology can be defined as a technology or innovation that creates a new market and value network and eventually disrupts an existing market and value network, displacing established market leaders and alliances. Outline any THREE technologies that can be classified as disruptive. [6 Marks] b). Explain two ways you use to make a cell in a worksheet fixed such that whenever used in the formula, the value it contains will remain the same. [4 Marks] c). Open-source software (OSS) is computer software with its source code made available with a license in which the copyright holder provides the rights to study, change, and distribute the software to anyone and for any purpose. Discuss any advantages presented by open source software in the field of education. [4 Marks] d). Discuss any TWO non-printable characters in a word processor e.g. Ms. Word. [6 Marks] QUESTION THREE [20 MARKS] a). Folders are frequently used to organize files. They have property sheets which display folder properties. Briefly outline any FOUR properties of a folder. [4 Marks] b). A plug-in is a software component that adds a specific feature to an existing computer program. Explain four uses of software plug-ins. [8 Marks] c). Sound clips are useful tools used to accompany presentations. Explain how you may insert and play a sound clip in a PowerPoint presentation. [4 Marks] d) Differentiate between backspacing and deleting as used in word processing. [4 Marks] QUESTION FOUR [30 MARKS] a). People with disabilities meet barriers of all types. However, technology is helping to lower many of these barriers. By using computing technology for tasks such as reading and writing documents, communicating with others, and searching for information on the Internet, students and employees with disabilities are capable of handling a wider range of activities independently. In this regard, discuss any FOUR types of hardware devices that can assist the physically challenged computer users. [8 Marks] b). Social media can be defined as a collection of technologies that enable people to share content online with one another. Describe THREE elements of social media. [6 Marks] c). Email can be defined as messages distributed by electronic means from one computer user to one or more recipients via a network. Discuss any THREE ways you can use email to market you product(s). [6 Marks] QUESTION FIVE [20 MARKS] a). The Internet is the global system of interconnected mainframe, personal and wireless computer networks that use the Internet protocol suite (TCP/IP) to link billions of devices worldwide. Discuss FIVE challenges of internet on small businesses in Kenya. [5 Marks] b). A presentation program is a software package used to display information in the form of a slide show. Discuss any FIVE features you will use to create a presentation. [5 Marks] c). In computer graphics, graphics software or image editing software is a program or collection of programs that enable a person to manipulate visual images on a computer. Describe THREE applications of graphics in a business. [6 Marks] d). Antivirus software is software that checks the program first, comparing it to known viruses, worms, and other types of malware and then destroys or neutralizes the effect of those viruses. In this regard, outline any FOUR antivirus software. [4 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 505 WEB DESIGN DEVELOPMENT DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) Briefly discuss what the Internet and World Wide Web are. Clearly show the difference if any [8 Marks] b) Using tables and other elements create a web page with the following output. [12 Marks] QUESTION TWO a) Using examples show the difference between tags, elements, attributes and attribute values [8 Marks] b) Define the terms “colspan” and “rowspan” as used in html. Hence give the html code that would give the following output [12Marks] c) d) Give two disadvantages of frames [2 Marks] QUESTION THREE a) Name and give the use of three main types of websites [6 Marks] b) Some important form controls are the button, check box, radio button and select boxes i. Give the difference between the button and radio button, and between the check box and the select box [4 Marks] ii. Write html code to show the difference between use of the radio button and the select box where the user must choose one day of the week. [10 Marks] QUESTION FOUR a) There are three types of lists. Using a html code define the three types of lists and give the expected output on a browser [10 Marks] b) In-page links are common in web design i. Give the difference between source anchors and destination anchors[3 Marks] ii. Give the html code for the following web-page outcome. (All underlined text are links within this web-page) [7 Marks] QUESTION FIVE a) Give the difference between GIF and JPEG image [4 Marks] b) Give the code for using an image as a link (the image we will use kca_logo.png found in the images folder) [4 Marks] c) Give an example of an attribute that does not have a value, also give its use [2 Marks] d) Write a webpage with the following output [10 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 504 APPLICATION PROGRAMMING DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) Define the following terms as used in programming and support your answer with examples. i. Method ii. Variable iii. Comments iv. Event driven programming [8 Marks] b) Write one line of code to perform the following tasks in VB (i) Display the text “Programming is great” on a label lbTrial (ii) To clear text form a text box txttrial (iii) Add items “apple”,”Mangoe”,”Orange”, to a combobox cbotrial (iv) Put the insertion cursor on the first textbox; txttrial [4 Marks] c) State the syntax of the functions msgbox[] and inputbox[] [2 Marks] d) Differentiate between the following looping constructs [give general syntax of each]; „while … loop‟ and „do… while loop‟. [4 Marks] e) One of the qualities of a good program is readability. As a result, there are a number of techniques employed by programmers to ensure that programs are readable. Discuss any TWO of them. [2 Marks] QUESTION TWO a) Differentiate between a sub procedure and a function [4 Marks] b) Write a windows application to accept inputs for the dimensions of a rectangle through the input box function and then compute the area and perimeter of the rectangle. The Area and Perimeter should be displayed through a Message Box [8 Marks] c) Explain the term debugging [2 Marks] d) Describe the Visual studio IDE environment and list FIVE components on this window. [6 Marks] QUESTION THREE a) Write a program to calculate the sum of the first SIX positive integers using the Do while loop [6 Marks] b) Rewrite the above code using the For..Next loop . [3 Marks] c) Explain the meaning of the following Visual Basic code. [2 Marks] Dim Test[5] as Integer ReDim Test[15] as Integer d) Explain THREE types of errors encountered during program development [6 Marks] e) Write pseudo code for a program to calculate the sum of ten numbers provided by a user [3 Marks] QUESTION FOUR a) Distinguish between a selection control and a loop control structure [4 Marks] b) Outline FOUR characteristics of a good algorithm [4 Marks] c) Briefly explain any THREE advantages of using functions in a program[6 Marks] d) Using examples, Explain any THREE fundamental data types supported by the VB language. [6 Marks] QUESTION FIVE a) List any TWO rules used when naming variables [Identifiers] [2 Marks] b) A program is required to process and award students grades for students in a class according to the following summary table. Marks%    Grade 80 –          100 A 60 –           79 B 40 –            59 C Below        40 Fail Write a VB program that prompts the user for the student‟s Marks and outputs the appropriate grade. [6 Marks] c) describe THREE data operators supported by VB [6 Marks] d) Describe the THREE control structures used in programming [6 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 408 JAVA PROGRAMMING DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) List four features of java [4 Marks] b) List the importance of using comments in java. Describe using examples single line and multiline comments [6 Marks] c) List and explain three types of variables used in java [6 Marks] d) Differentiate between object oriented programming languages and event driven programming [2 Marks] e) List three rules of naming variables [2Marks] QUESTION TWO a) Explain the meaning of the following escape sequences [4 Marks] i. \n ii. \t iii. \b iv. \’ b) Discuss the following elements of OOP [8 Marks] c) Create a class named Commission that includes three variables: a double sales figure, a double commission rate, and an integer commission rate. Create two overloaded methods named compute Commission(). The first method takes two double arguments representing sales and rate, multiplies them, and then displays the results. The second method takes two arguments: a double sales figure and an integer commission rate. This method must divide the commission rate figure by 100.0 before multiplying by the sales figure and displaying the commission. Supply appropriate values for the variables, and write a main() method that tests each overloaded method. [8 Marks] QUESTION THREE a) A cloth showroom has announced the following seasonal discounts on purchase of items Purchase Amount Discount Mill Cloth Handloom Items 0-100 ____ 5.0% 101-200 5.0% 7.5% 201-300 7.5% 10.0% Above 300 10.0% 15.0% Write a program using switch and if statements to compute the net amount to be paid by a customer [8 Marks] b) Complete the table below by stating the name and an example of the operators [4 Marks] Operator Meaning Example % ++ += x&=y c) Differentiate between the following [6 Marks] i. superclass and subclass ii. overloading and overriding iii. Aggregation and containment d) Describe how you compile and run a java program [2 Marks] QUESTION FOUR a) Discuss the following elements of OOP [8 Marks] i. Encapsulation ii. Information Hiding iii. Inheritance iv. Polymorphism. b) What is the difference between a break statement and a continue statement use examples [2 Marks] c) What is package in JAVA? [2 Marks] d) Give 5 features of Java Programming Language [5 Marks] QUESTION FIVE a) The numbers in the sequence 1 1 2 3 5 8 13 21… are called fibonacci numbers. Write a programming using a do…while loop to calculate and print the first m fibonacci numbers (Hint: After the first two numbers in the series, each number is the sum of the two preceding numbers) [6 Marks] b) Explain five method access modifiers used in java [10 Marks] c) Differentiate between a package and interface [4 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 407 NETWORK DESIGN AND SETUP DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE (a) Explain any four factors you would consider when selecting networking devices (8 Marks) (b) Define the following terms (4 Marks) i. Back bone cabling ii. Horizontal cabling iii. Wiring closets iv. Work area cabling (c) Each media type has its advantages and disadvantages. State the factors to be considered when choosing a network media (4 Marks) (d) List factors to consider when planning an IPv4 addressing scheme. (4 Marks) QUESTION TWO (a) Describe the concept of CSMA/CD (2 Marks) (b) Describe Simplex, Half-Duplex and Full-Duplex transmission. (6 Marks) (c) State and explain FOUR key goals in a LAN design. (4 Marks) (d) Highlight the main differences between a Static IP Address and a Dynamic IP Address. (4 Marks) (e) Explain the use of the following commands in networking i. traceroute / tracert ii. ping iii. ifconfig iv. ipconfig /all (4 Marks) QUESTION THREE (a) Describe the following switching approaches i. Cut through switching ii. Store and forward switching iii. Fragment free switching (6 Marks) (b) Give TWO reasons why Wireless media would be preferred over cable media. (4 Marks) (c) Briefly describe the responsibilities of a Network Administrator. (4 Marks) (d) Highlight THREE minimum requirements for installing Windows Server 2008. (3 Marks) (e) Explain any THREE factors to consider when selecting Transmission Media. (3 Marks) QUESTION FOUR (a) List four examples of network operating systems (2 Marks) (b) Explain functions of a network operating system (4 Marks) (c) To provide security, a network manager must address two areas. State the two (d) areas (4 Marks) (e) Explain to ways to prevent Denial of service attacks (4 Marks) (f) Give THREE reasons why you would choose a Linux platform for Network (g) Administration over a Microsoft Windows Server platform. (6 Marks) QUESTION FIVE (a) Define the following terms (8 Marks) i. Terminal ii. Protocol iii. Throughput iv. Response time (b) Differentiate between the following servers (4 Marks) i. Enterprise server ii. Workgroup server (c) List any four network hardware’s and their functions (4 Marks) (d) Differentiate between data and voice communication (4 Marks)

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 406 HUMAN COMPUTER INTERACTION DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE (a) List any four goals of HCI. [2 Marks] (b) Explain the term Task Analysis [2 Marks] (c) Briefly explain and illustrate using a diagram, the evaluation execution cycle proposed byDonald Norman [6 Marks] (d) The focal point of Gestalt theory is the idea of “grouping,” or how we tend to interpret a visual field or problem in a certain way. Explain briefly the four main factors that determine grouping . [4 Marks] (e) Differentiate the terms as used in HCI: [4 Marks] i. “gulf of execution” and “gulf of evaluation”. ii. Knowledge in the head and knowledge in the world (f) List any two Shneiderman‟s Golden Rules [2 Marks] QUESTION TWO (a) Differentiate between: i. Closure and Chunking [4 Marks] ii. “affordance” and “visibility” as used in usability principle [4 Marks] (b) Evaluation is concerned with gathering data about the usability of a design or product by a specified group of users for a particular activity within a specified environment or work context. There are a wide range of methods which can be used for evaluation. i. List four important things to consider regardless of the type of evaluation being done. [4 Marks] ii. State any two typical reasons why evaluations are done. [2 Marks] (c) Discuss three major principles of direct manipulation [6 Marks] QUESTION THREE (a) Briefly explain why „think aloud‟ techniques can be a cost-effective tool for formative evaluation. [2 Marks] (b) Name two differences between short and long term memory. [2 Marks] (c) Why is functional ageing important for the design of interactive systems? [2 Marks] (d) What are the benefits of observational rather than lab based evaluations? [2 Marks] (e) State and explain any three non-computer method of developing prototypes [2 Marks] (f) State and explain any four Metaphor creation principles [4 Marks] (g) Briefly discuss any four reasons why design is difficult when building human computer interaction systems. [2 Marks] (h) Briefly explain what is meant by the terms perception, physiology and cognition. [4 Marks] QUESTION FOUR (a) Identify two different ways in which `functional ageing’ can affect interface development. [4 Marks] (b) Environmental factors can impair users’ ability to recall information that is necessary to cooperate complex, computer systems. Brielfy explain how such disruptions can impair both short-term AND long-term memory. [6 Marks] (c) You have been asked to help in the development of a new computerized call centre. Customers from a national Bank will ring up if they wish to change the details of their account. For instance, they might want to open a new account, close an old account, they might want to change the address of the person who owns the account and so on. Briefly explain how you might use a number of different requirements elicitation techniques to identify the potential usability problems that might arise for people working with this new system. Identify the principle strenghts and weaknesses of each technique [10 Marks] QUESTION FIVE (a) Give three examples of how websites can aid accessibility [4 Marks] (b) List and briefly explain any three Principles of Flexibility that support usability. [6 Marks] (c) Brief discuss any two techniques for doing evaluation [4 Marks] (d) Explain “Knowledge in the head v/s Knowledge in the world” [4 Marks] (e) Explain, using an examples, the principles of cognitive walk through [2 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 402 FUNDAMENTALS OF COMPUTER NETWORKS DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) Define a network in relation to computer networks. (2 Marks) b) Discuss the following components of computer network; i. Terminal ii. Workstation iii. Server iv. Network interface card v. Network Operating System (10 Marks) c) Discuss FOUR types of unguided transmission media. (4 Marks) d) Discuss the difference between two key reference models used in computer networks (4 Marks) QUESTION TWO a) Communication is the activity or process of exchanging information in mutual understanding form. Discuss various types of transmission media with emphasis on guided and unguided types of transmission media. (10 Marks) b) Define network topology and discuss THREE main network topologies citing their characteristics, merits and demerits. (10 Marks) QUESTION THREE a) Differentiate between active hub, passive hub and intelligent hub as networking devices. (6 Marks) b) Discuss the following internetworking devices stating their strength and limitations. (8 Marks) i. Routers ii. Brouters iii. Gateways iv. Switches c) Company X has just made a decision to network their organization systems using LAN type of network.Discuss FOUR main networking devices you would advise company X to use (4 Marks) QUESTION FOUR a) Discuss the following types of networks stating their advantages and disadvantages while pointing out their strengths and weaknesses; i. Peer – to – Peer network ii. Server – Based network (8 Marks) b) Discuss THREE main categories of networks pointing out their characteristics, merits and demerits. (12 Marks) QUESTION FIVE a) The main objective of networking is to connect all the devices so that resources and information can be shared efficiently. Discuss THREE switching techniques used in networking. (9 Marks) b) State TWO reasons why networks split data into small pieces before transmission. (2 Marks) c) State TWO merits and demerits of token passing in computer networks. (2 Marks) d) Discuss OSI reference model explaining functions of each of its seven layers. (7 Marks)

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 306 STRUCTURED CABLING DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) Define Structured Cabling and give two applications of structured cabling. [4 Marks] b) When terminating a UTP cable to an R-J45 connector, there are 2 modes of termination: T568-A and T568-B. Give the color codes for each, and differentiate between Straight Through and Cross-Over termination. [8 Marks] c) Describe any 3 testing and troubleshooting tools that are used on structured cables. [6 Marks] d) Define Grounding. [2 Marks] QUESTION TWO a) Describe the following: i). Backbone Cabling ii). Horizontal Cabling iii). Work Area Cabling iv). Vertical Cabling. [8 Marks] b) Describe the four steps to take during pre-cabling preparation. [4 Marks] c) With the help of a diagram, distinguish the following: i). Coaxial Cable and Twisted Pair Cable ii). Single Mode Fiber Optic Cable and Multi Mode Fiber Optic Cable [8 Marks] QUESTION THREE a) (i) What is a Wire Map Test? [1 Mark] (ii) State and Explain Five Wiring Installation Errors that a Wire Map Test can identify. [5 Marks] b) Discuss FOUR reasons why a cable installation can experience attenuation? [4 Marks] c) During cable installation, safety rules are to be followed. List any 6 cable installation safety guides to observe and be followed. [6 Marks] d) Describe FOUR categories of Communication Systems. [4 Marks] QUESTION FOUR a) When running network cabling to a building, there are cautions to take. List and explain any 5 things you shouldn’t do when running network cable. [5 Marks] b) List and describe the steps and factors to consider when setting up a peer-to-peer network. [10 Marks] c) Define any 5 cable supporting structures. [5 Marks] QUESTION FOUR a) Describe the functions of the following tools: [10 Marks] i). Punch down tool ii). Patch Panel iii). Crimping tool iv). Sheath remover v). Cable tester b) In structured cabling, describe the purpose and steps to take when pulling backbone cables and horizontal cables. [4 Marks] c) Describe in detail how to terminate a 4-pair UTP cable into its connector. [6 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 305 PROGRAMMING METHODOLOGY DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE (a) Briefly explain the program control structure used in the following code snippet, hence state the output. int n,i; n=17; i=3; printf(“%d\n”,n); n+=i; printf(“%d\n”,n); n*=i; printf(“%d\n”,n); n-=i; printf(“%d\n”,n); n%=i; printf(“%d\n”,n); [7 Marks] 2 (b) Identify the error(s) in the following code: #include <stdio> int main() { int n,i; n=17; for(i=0;i<=n;); { printf(“%d\n”,n); } } [4 Marks] (c) Rewrite the following code using if…else statement. #include <stdio.h> int main() { int n,x; n=17; printf(“Enter value of x:\n”); scanf(“%d”,&x); (x>n)?printf(“%d\n”,n+1):printf(“%d\n”,n+2); return 0; } [9 Marks] QUESTION TWO (a) Differentiate between the following terms as used in c programming [i]. Local variable and global variable [2 Marks] [ii]. Rvalue and Lvalue [2 Marks] [iii]. Literal constant and symbolic constant. [2 Marks] (b) Write a program in c that uses three functions sum(), avg() and main() where sum calculates the sum of two floating point values passed to it by main function. The avg() function then calls the sum so as to get the numerator/total and calculates the average. Both the sum and average results are returned to the main function which displays the output in one decimal place. [10 Marks] (c) Write the following mathematical expressions in c. QUESTION THREE (a) For each of the following kinds of information, state the most suitable data type you would use in a c program. [i]. Number of employees in an organization [2 Marks] [ii]. A student letter grade [2 Marks] [iii]. Currency exchange rate [2 Marks] (b) State and explain any two operators used with pointers in a c program. [6 Marks] (c) Define an array as used in a c program, hence use your knowledge of arrays to state and explain the output of the following program. #include <stdio.h> int main() { int i; char lett[]={‘U’,’N’,’I’,’V’,’E’,’R’,’S’,’I’,’T’,’Y’}; printf(“%c”,lett[0]); printf(“%c”,lett[1]); printf(“%c”,lett[7]); printf(“%c”,lett[8]); printf(“%c”,lett[9]); printf(“\n”); return 0; } [8 Marks] QUESTION FOUR (a) Write a program in c that prints even numbers between 1 and 1000. [6 Marks] (b) A researcher has asked you to write a program in c that prints responses for a questionnaire using likert scale after the user types the option from the keyboard using a criteria shown below. [10 Marks] (c) Outline four advantages of imperative programming paradigm. [4 Marks] QUESTION FIVE (a) Write a program in c that calculates product table of numbers from 1 to 6 as shown using nested for loop. [10 Marks] (b) Describe any FIVE characteristics of a good programming language. [10 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 304 PRINCIPLES OF COMPUTER SUPPORT & MAINTENANCE DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) Explain how you would go about taking measurements of Direct current (DC) of a power supply Unit by use of Digital meter. [4Marks] b) Discuss TWO possible causes of boot failure with their solutions. [4 Marks] c) Discuss FIVE hard drive preventive maintenance procedures (PM) [5 Marks] d) Explain the TWO major importance of drive partitioning during operating system installation. [2 Marks] e) Describe the boot process of a computer system. [5 Marks] QUESTION TWO a) The following are components found within Computer Power supply and motherboard electronic circuitry. Complete the table below as indicated.[9 Marks] b) Tommy realized after powering his desktop running windows xp that there was a string of text indicating NTLDR file missing. After copying the file back from bootable Win xp CD, he encountered a blue screen indicating corrupt operating system. i. Discuss TWO possible faults with the system. [4 Marks] ii. Give the possible Solutions and process to overcome the faults mentioned above. [6 Marks] iii. What are HOT SWAPPABLE Devices? [1 Marks] QUESTION THREE a) Describe how you would mount and configure Four Hard disk drives on one system Unit with IDE/SATA channel at the Bios Set-up level [6 Marks] b) Explain any TWO common keyboard errors and indicate the possible solution for the same. [4 Marks] c) Discuss FOUR factors one would consider before purchasing a server for network operations. [6 Marks] d) Give the meaning of the following acronyms. [4 Marks] CHKDSK /P. FIXBOOT 3 DXDIAG. IPCONFIG /ALL QUESTION FOUR a) Explain two possible printer faults and their remedies [4 Marks] b) Discuss the outcome of the RUN commands below. [4 Marks] i. Ping 172.16.2.40 ii. \\172.16.2.40\c$ iii. Net view iv. Ifconfig c) From Business continuity plan (BCP) and disaster recovery plan (DRP) point of view, discuss the skills you have acquired so far in ensuring computer systems operate optimally. [12 Marks] QUESTION FIVE a) Provide the differences between dual booting and warm booting in computing. [2 Marks] b) What is the work of a start-up Disk? [2 Marks] c) Describe how one can make a start up Disk using Windows xp Operating system. [4 Marks] d) Meko started his Printer and realized it was NOT being detected by client computers on the network. Explain the causes of the problem and elaborate on steps you could undertake to resolve the issue in case the network connectivity and its devices are functional. [12 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN BUSINESS INFORMATION TECHNOLOGY DIT 301 COMPUTER OPERATING SYSTEMS DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE (a)In the context of a computerized environment:- i. Define the term ‘operating system’ [2 Marks] ii. List and describe six major functions of computer operating system [6 Marks] (b) Explain the following terms as applied in computers:- [4 Marks] Buffering Spooling (c)State the purpose of swap file in memory management [2 Marks] (d) Explain two advantages of NTFS file system over FAT file system [2 Marks] (e)Distinguish between synchronization and mutual exclusion while running concurrent processes [4 Marks] QUESTION TWO (a) With the aid of a diagram, describe the following memory management techniques as used by operating systems: – [6 Marks] i. Paging ii. Single continuous allocation (b) i. In relation to operating systems, explain the term ‘process’ [2 Marks] ii. List and briefly describe the five states of a process [5 Marks] (c) Differentiate between ‘block’ and character devices as used in input/output devices [4 Marks] QUESTION THREE (a) Describe three file management activities supported by an operating systems [6 Marks] (b) Distinguish between the following terms as applied in operating systems:- [8 Marks] i. Multiprocessing & multiprogramming ii. Command languages & job control languages (c) State three objectives of an operating system [3 Marks] (d) Write MS DOS commands that would carry out the following:- i. Display all the directories stored in Drive C ii. Partition a hard disk iii. Create a folder in drive C:\ named Operating system [3 Marks] QUESTION FOUR (a) Differentiate between pre-emptive and non-preemptive policies as used in process scheduling [2 Marks] (b) Explain the following terms as used in operating systems:- [6 Marks] i. Thread ii. Internal fragmentation iii. Shell (c) Explain the following I/O techniques giving an example in each case: – [6 Marks] i. Buffering ii. Caching (d) State four objectives of the input/ output device manager [4 Marks] (e) Distinguish between response and turnaround time as used in process scheduling [2 Marks] QUESTION FIVE (a) State four requirements of memory management in respect to operating system [4 Marks] (b) i. Define the term ‘deadlock’ [2 Marks] ii. List and briefly describe four conditions necessary for a deadlock to occur [8 Marks] iii. Suggest two ways of avoiding the deadlock [2 Marks] (c) Highlight four types of computer operating systems you are familiar with [4 Marks]

UNIVERSITY EXAMINATIONS: 2013/2014 ORDINARY EXAMINATION FOR THE DIPLOMA IN INFORMATION TECHNOLOGY DIT 205 PRINCIPLES OF DATABASE DESIGN DATE: AUGUST, 2014 TIME: 1½HOURS INSTRUCTIONS: Answer Any Three Questions. QUESTION ONE a) Define the following terms as used in database design and development and give one example in each case. i). Entity [1 Mark] ii). Database management systems [1 Mark] iii). Strong Entity [1 Mark] iv). Weak Entity [1 Mark] b) Hazina Sacco uses the manual filing system approach instead of a database approach. List any six limitations that come with Manual filing systems. [6 Marks] c) Describe any TWOadvantages of Database approach [5Marks] d) Highlight anyTHREE components of a database environment. [3 Marks] e) Design a hierarchical database using the information below. [2 Marks] QUESTION TWO a) Describe the THREE levels of database architecture. [6 Marks] b) Use the information below to answer the questions below. Each DOCTOR must treat one or more PATIENTS. Each patient must be treated by a doctor. Each PATIENT may take one or more MEDICATIONS. Each MEDICATION is given to one PATIENT i). Identify the entities in this case. [4 Marks] ii). Represent the above information using IDEFIX and REIN85 ERD notations. [10 Marks] QUESTION THREE a) Define the term Database design as used in database system [1 Mark] b) Explain FOUR classifications of relationships based on Degree. [4 Marks] c) Differentiate between the following as used in classification of relationships i) Mandatory and Optionality ii) Key attribute and Non-Key attribute [4 Marks] d) Identify FOUR main Factors considered when selecting the DBMS [4 Marks] e) Write SQL statements on how you would create the following database [4 Marks] i) Database name: SALES ii) Database Tables include: SUPPLIER AND PRODUCT f) Give any THREE examples of DBMS used in Databases. [3 Marks] QUESTION FOUR a) Explain the following Testing techniques [6 Marks] i) Black Box Testing ii) White Box Testing iii) Acceptance Testing b) Describe the process of software and hardware acquisition during database implementation. [4 Marks] c) State and explain any FIVE database security threats. [5 Marks] d) For the above threats explain FIVE possible counter measure [5 Marks] QUESTION FIVE a) Define the following as used in Normalization i. Functional dependency ii. Partial Functional Dependency iii. Transitive Functional Dependency iv. Normalization [4 Marks] b) Identify THREE database anomalies [3 Marks] c) Explain any three reasons why a database designer should could consider normalization before creating a database. [3 Marks] d) Normalize the following Report to Third Normal Form [10 Marks]