UNIVERSITY OF NIGERIA NSUKKA (ALVAN IKOKU FEDERAL COLLEGE OF EDUCATION, OWERRI PROGRAMME) Department of Computer Seience & Robotic Education First Semester Examination 2021 (AUGUST) COS 101: Introduction to Computer Science Attempt Question No. 5 and any other Two Questions in YOUR ANSWER BOOKLET. 2 HOURS

Q1a. Classify computers based on generation and their characteristics
b. Mention ten(10) components found in the system unit of computer
c. Critically discuss computer operating system
d. List ten examples of application software
e. Discuss (i). RAM (ii) General Purpose Computer (iii) Primary Memory (iv) Control Unit
Q2.Explain the following:
2a. algorithm. 2b. computer application package software. 2c. Pascal calculator.
2d. Abacus. 2e. vacuum tube. 2f. ULSI. 2g. OS. 2h. Computer peripherals. 2i. OMR.
2j. Monochrome Monitor
Q3 Write short note on:
3a. Translator. 3b. Interpreter. 3c. Compiler. 3d. Assembler. 3e. Data Bus.
3f. Address Bus. 3g. Control Bus. 3h. Analog Conputer.
3i. Digital Computer. 3j. Hybrid Computer
Q4.Outline the contributions of each of the following persons in the history of computer.
4a. John Napier. 4b. John Von Neumann. 4c. Blaise Pascal.
4d. George Boole 4e. Augusta Ade. 4f. Charles Babbage.
4g. Joseph M Jacquard 4h. Herman Hollerith 4i. Grace Hopper. 4j. J.V Atanasoff.
Q5.Given that X= 1010010011001011100, andY= 10010110, evaluate X/Y leaving your answer in :
1. Decinal_______
2.Binary_______
3.Octal_______
4. Hexadecimal_____
*Convert 101111.101111 to:
6. Decinal_____
7.Octal______
8.Hexa______
9.What is the sum of; A7DEAF, ABCD, and FF8C in Hexadecimal:___
10.The difference between AF49CEAAJ and BFFFIC in Hexadecimal:____
11.Write in figures “One billionth instructions per second._____
12. Convert 38 10 to excess-3 codes:____
*Compute the product of CCAA9D and ABCDEF8 leaving your answer in:
13. Hexadecimal.___
14. Decimal.___
15. Octal._____
2 Binary
16.Convert 6.75 10 to Binary____
*Give two examples of:
First Generation Computer Systems 17.___18.___
Second Generation of Computers 19.__20.__
Third Generation of Computers 21.___22.___
Fourth Generation of Computers 23.__24.__
Fifth Generation of Computers 25.___26.___
*Decode the following acronyms:
27.IC_____
28.EDVAC___
29.EDSAC_____
30.ASCII_____

ALVAN IKOKU FEDERAL COLLEGE OF EDUCATlON OWERRI, IMO STATE IN AFFILIATION WITH UNIVERSITY OF NIGERIA, NSUKKA SVTE, DEPARTMENT OF COMPUTER & ROBOTICS EDUCATION REGULAR PROGRAMME 1ST SEMESTER EXAMINATION 2021/2022 SESSION COS 101: INTRODUCTION TO COMPUTER SCIENCE 2HRS INSTRUCTION: Attempt Question No. 5, No.6 and any other Two Questions in 2hrs

Q1a. With what do you associate each of the following persons in computer history?
i.Charles Babbage, ii. Ada Augusta, iii. Herman Hollerith. iv. Blaise Pascal, v.. J Attansoff.
vi. John V Neumann, vii. Grace Hopper, vii. Maurice Wilkes, ix. Presper Eckert, x. Dr Philp
Emeagwali.
b. Discuss the identity element of each of the main five generations of computers


Q2a. Write Short Notes on:
i. Mother Board, ii. Math Co-Processor Board, iii. The Main Memory
iv. The Floppy Disk Drive, v. The Hard Disk Drive.
b. List ten examples of application software.


Q3a. Mention ten (10) components found in the system unit of computer
b. Discuss (i). RAM (ii) General Purpose Computer (iii) Primary Memory (iv) Control Unit
c. In conputerdom, what does each of the following mean to you: i. Flowchart; ii. Algorithm;
iii. ROM iv. Barcode; v. ALU


Q4a. Write short note on:
i.Translator. ii.Interpreter.
iii.Compiler. iv.Assembler.
v.Data Bus. vi. Aderess Bus, vii. Control Bus. viii.Analog Computer. ix. Digital Computer. x.Hybrid Computer.
b. State: i. four types of computer output; ii. four type of computer output devices;
iii. what is computer operating system


Q5. Given that X = 11000001100011z and Y = 1100111111z, evaluate X÷Y leaving your answer
in: (i). Decimal___
(ii).Binary____
(iii).Octal_____
(iv).Hexadecimal
(v). How many bytes are there in one Yottabyte
Convert 10001111•101111z to: (vi).Decimal____
(vii).Octal____
(viii).Hexa____
(ix).What is the sum of A7DEAF, ABCD, and FF8C:___
(x).The difference between AF49CEAAF and BFFFFD is____
(xi) Write in Floating number “One billionth instructions per second:_____
(xii)Convert 38io to excess -3 codes_____
Compute the product of CCAA9D and ABCDEF8 leaving your answer in (xiii) Decimal__
(xiv).Octal____
(xv) Hexadecimal___


Q6.(a) Convert 6•75io to Binary____
Give two examples of: First Generation of computers(b)_&(c)__
Second Generation of computers (d)__&(e)__
Third Generation of computers (f)__&(g)_Fourth Generation of computers (h)__
&(i)__Fifth Generation of computers (j)__&(k)___
Decode the acronyms :(l)IC__
(m)CRT__(n)IBM_(o)DVD___

ALVAN IKOKU FEDERAL COLLEGE OF EDUCATION, OWERRI IN AFFILIATION WITH UNIVERSITY OF NIGERIA NSUKKA Faculty: Education School: VOC & Tec. Ed. Department: Computer and Robotics Education Course Code: Cos 304 Academic Year:2021/2022 Course Title: COMPUTER APPLICATIONS Semester: 2nd SEMESTER EXAM Cos 304 2021/2022 ATTEMPT ANY 4 QUESTIONS TIME: 2hrs

1a) As a computer director in your organization, what are the criteria for accepting a computer software package for your company?
b) Highlight and discuss the cursor control keys of the computer keyboard. Mention and explain the features of the mouse.
c) Give three (3) examples of each of these computer software packages”- (i) Word Processing (ii) spread sheet iii) Database management system (iv) Design Packages Electronic
d) Discuss what you think that gives the computer its versatility.

2a) Define Windows Explorer and mention its functions.
b) Why is it also advisable to properly shut down your computer system? Write the steps to shut down using the Windows 7.
c) Highlight and discuss the different types of scanners. Mention the two (2) components of an e-mail address.
d) Give eight (8) reasons why majority of computer users prefer using Windows to DOS operating system

3a) Differentiate between (i) The Deletion pattern of Back space and Delete keys of the keyboard, (ii) The Monochrome and RGB monitors.
b) Discuss the limitations of the mouse.
c) State how each of the following output devices work:
(i) Card Punch ii) Bubble-jet iii) Plotter

4a) Outline any five versions of Windows Operating system developed after Windows 98
b) The Computer can be described as “Jack of all Trade, Master of all “. Discuss
c) Mention and describe the examples of the system software that enable the computer to interact with and understand humans and the human language.

5a) Explain the term “Electronic Spread Sheet and highlight the importance of this application package
b) Explain the following concepts: i) cell ii) Range iii) Worksheet (iv) Workbook
c) How would you achieve the following in Ms-Excel? (i) Load Ms-Excel (ii)open an existing worksheet from the hard disk (iii) Save a worksheet with the password “Dr Saglo”
(iv)Quit Ms – Excel

6a) Define the computer Network and explain its classification.
b) Differentiate between the internet and the intranet
c) Identify and explain any five 5 internet resources.

ALVAN IKOKU FEDERAL COLLEGE OF EDUCATION OWORRI, IMO STATE IN AFFILIATION WITH UNIVERSITY OF NIGERIA, NSUKKA SCHOOL :SVTE DEPARTMENT: DEPARTMENT OF COMPUTER & ROBOTICS EDUCATION COURSE TITLE: COMPUTER APPLICATION SEMESTER: Second COURSE CODE: COS 304 ACADEMIC YEAR: 2022/2023 CREDIT UNIT: 2 units INSTRUCTION: ATTEMPT ANY FOUR (4) QUESTION TIME: 2 hours

1a). Highlight and discuss the eight (8) cursor control keys on the computer key board.
b). Discuss Touch Screen input Device
c). Differentiate between Dot-Matrix and Laser Printer
d). Give the reason(s) why it is prudent to properly shut down the coinputer system after use. Write the steps to shut down the computer system when using Windows 7
2a). Define the internet and briefly explain the essence of computer Network.
b). Differentiate between MAN and WAN.
c). Mention and discuss the two (2) components that made up an internet e-mail address.
d). Write short notes on these Internet Resources (i) Gopher (ii) Telnet (iii)Finger serve (iv) World Wide Web (v) Internet Relay Chart
3a). Explain the tern Computer Software
b). Differentiate between In-House and Purchase Mode in acquiring a computer software.
c). Being Computer literate, in your compay, advise your company management on the criteria to consider before accepting a sofrware package for the company.
c). Spell out the importance of Electronic Spreadsheet.
4a. Define Computer-Assisted Instruction (CAI)
b) Describe one major advantage and one limitation of CAI.
c) Imagine you are designing a CAI programm to teach students about the basics of physics. Describe one interactive feature you would incorporate and explain why.
d). Write short note on the following (i) A Cell (it) Worksheet and Workbook (iii) A Range and Active Cell.
5a. Define Computer-Managed Instruction (CMI) and explain how it can be beneficial for educators.
b) An educational institution intends to implement a CMI system for their courses, List and briefly explain two
features they should consider when selecting a CMI system.
c). Write the steps to save and password your Work in Ms-Excel
d). Decode the following e-mail and internet acronyms: BTW; AAMOF; IMHO; TYVM; FTP;
WAIS; IRC
6(a) Draw an MS Word Window showing the following: (i) Menu Bar (i) Task Bar (iii) Standard Tools Bar (iv) Title Bar (v) Scroll Bars (vi) Minimize Button (vii) Restore/Maximize Button (vii) Close Button (ix)Working Area (x) Start Button
(b) Highlight the steps to perform the following activities / tasks in Windows 7 or Windows XP
(i) Setting the System Date/Time (ii) Creating a folder on a desktop (iii) copy file(s) from one folder to another.