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30 12 4 **************** 2 COMPUTER ST. 2 ;"REVISION NOTES." 2 2 1 T$="MOCK O LEVEL COMPUTER STUDIES " 1 REVEX 1 G$=" O 1 C$="VERIFY" 1 C$="STRING" 1 C$="SEQUENTIAL" 1 C$="RESTORE" 1 C$="PRINTER" 1 C$="PARALLEL" 1 C$="MICROSECOND" 1 C$="MANTISSA" 1 C$="GOSUB" 1 C$="FALSE" 1 C$="ERASABLE" 1 C$="DISASSEMBLER" 1 C$="CONTROL" 1 C$="ASSEMBLER" 1 C$="ASCII" 1 C$="APPLE PIE" 1 C$="ACCUMULATOR" 1 C$="65536" 1 C$="10001011" 1 ;"YOUR REVISION TIMETABLE WILL HAVE TO BE DRASTICALLY BRIEF. " 1 ;"YOU WILL NOT FIND TIME LATER." 1 ;"YOU FAILED ";Z;" PERCENT." 1 ;"WORK ON YOUR OWN." 1 ;"WELL SORRY, BUT IT WILL NOT." 1 ;"WEEK 3 COMPUTER LOGIC " 1 ;"WEEK 2 THE STORAGE OF DATA " 1 ;"UNDERSTAND THE WORK NOW!!!!" 1 ;"TRY TO SPEND SOME TIME DOING EXTRA READING." 1 ;"TIME WISELY"; 1 ;"THIS SHOULD THEN BE YOURS" 1 ;"THIS IS WHERE IT SHOWS IF YOU REALLY WANT TO PASS. " 1 ;"THIS IS WHAT YOU ARE HEADING FOR" 1 ;"THIS IS THE BEST POSSIBLE TIME TO BEGIN A SERIOUS PROGRAMME OF REVISION. " 1 ;"THE MOST IMPORTANT LESSON IS THAT THERE IS NO SUBSTITUTE FOR HARD WORK." 1 ;"THE MARKS PER"; 1 ;"STOP KIDDING"; 1 ;"SOCIAL LIFE." 1 ;"SO YOU THINK THIS WILL PASS YOUREXAMS FOR YOU?" 1 ;"SO YOU HAVE WOKEN UP AT LAST." 1 ;"SCISOFT"; 1 ;"REVISION TIMETABLE." 1 ;"REMEMBER TO "; 1 ;"REMEMBER A CLEAR DIAGRAM IS OFTEN WORTH PAGES OF NOTES." 1 ;"READ THE QUESTION." 1 ;"QUESTION:";X: 1 ;"PRESS R FOR REVISION PROGRAMME." 1 ;"PRESS ANY KEY TO CONTINUE." 1 ;"PLEASE KEY ONE OF THE FOLLOWING" 1 ;"PLEASE KEY IN YOUR NAME THEN PRESS ENTER. " 1 ;"PAST PAPERS." 1 ;"PASSING." 1 ;"PANICKING EH? "; 1 ;"ONLY IF YOU LEARN THEM PROPERLY ARE THEY ANY USE TO YOU. " 1 ;"MOCK G.C.E. 'O' COMPUTER STUDIES" 1 ;"MAKE YOURS THOROUGH,COLOURFUL AND ABOVE ALL INTERESTING. " 1 ;"MAKE YOUR REVISION BOOKLET." 1 ;"Key in answer, ENTER to continue Please only use UPPER case. " 1 ;"KEY X TO SEE AN EXAMPLE." 1 ;"ITS MAKE YOUR MIND UP TIME." 1 ;"IT WILL BE SO MUCH HARDER LATER" 1 ;"I WOULD SUGGEST THAT IT IS TOO EARLY TO BEGIN YOUR REVISION." 1 ;"HOWEVER" 1 ;"HELLO THERE ";A$;"." 1 ;"GRADE C PASS ";Z;" PERCENT" 1 ;"GRADE B PASS ";Z;" PERCENT" 1 ;"GRADE A PASS ";Z;" PERCENT" 1 ;"GOOD LUCK "; 1 ;"EXPECT NO SOCIAL LIFE AT ALL. " 1 ;"E.G. WEEK 1 THE STRUCTURE OF THE COMPUTER " 1 ;"E.G. WEEK 1 DATA PROCESSING " 1 ;"CONFIDENT." 1 ;"BUT! ABOVE ALL." 1 ;"BUT DO NOT FOOL YOURSELF. " 1 ;"ANSWER = 1101" 1 ;"AND ONLY THEN" 1 ;"ADDERS"; 1 ;"1 1 0 1" 1 ;"1 1 1 "; 1 ;" are used to add BINARY CODES." 1 ;" YOURSELF- YOU ARE ALMOST AN ADULT NOW." 1 ;" WRITE DOWN A TIMETABLE OF TOPICS TO REVISE WEEK BY WEEK" 1 ;" WHEN YOU HAVE LEARNED EACH TOPIC THOROUGHLY AND ARE ABLE TO ANSWER QUESTIONS SET THEN YOU SHOULD MAKE BRIEF NOTES IN YOUR REVISION NOTEBOOK." 1 ;" REVISION" 1 ;" REVISION " 1 ;" REDUCED YOUR SOCIAL LIFE." 1 ;" REALLY HAVE GOT YOUR WORK CUT OUT IF YOU ARE TO STAND MUCHCHANCE OF A PASS." 1 ;" QUESTIONS." 1 ;" QUESTION WHICHARE OFTEN PRINTED AT THE SIDES AS AN EXTRA GUIDE." 1 ;" PREPARED + LEARNED SOME " 1 ;" MADE OUT A REVISION TIMETABLE" 1 ;" GET FROM YOUR TEACHER A BREAKDOWN OF THE SYLLABUS." 1 ;" FIND A PLACE WHERE YOU CAN WORK REGULARLY UNDISTURBED." 1 ;" EG.ON REVISION NOTES" 1 ;" ANSWERED LOTS OF PAST PAPERS." 1 ;" 1 1 0" 1 ;" THE FOLLOWING ARE SUGGESTED TOPICS FOR REVISION "; 1 ;" INTERESTING. (USE COLOUR TO UNDERLINE)" 1 ;" CONCISE." 1 ;" THE BIG DAY" 1 ;" MOCK EXAM." 1 ;" >6 MONTHS TO EXAM" 1 ;" 3-6 MONTHS TO EXAM" 1 ;" 2-3 MONTHS TO EXAM" 1 ;" 1 MONTH TO EXAM" 1 ;" WEEK 3 DATA INPUT/OUTPUT " 1 ;" WEEK 2 COMPUTER LOGIC " 1 ,,,,"YOU COULD BEGIN WORK ON MAKING ABOOKLET OF CONCISE NOTES." 1 ,,,,"IS YOUR TEACHER HAPPY WITH YOUR MARKS IN TESTS?" 1 ,,,,"BREAK THE SYLLABUS DOWN INTO SENSIBLE PARTS." 1 ,,,,"AS THE DAY GETS CLOSER THESE WILL BECOME INVALUABLE." 1 ,,,,"ARE YOU SURE THAT YOU ARE DEVOTING SUFFICIENT TIME TRYING TO UNDERSTAND THE WORK?" 1 ,,"YOUR FRIENDS WILL NOT BE THERE ON THE DAY." 1 ,,"WHAT IT WILL DO IS SHOW YOU WHATYOU CAN DO TO HELP YOURSELF." 1 ,,"USE THE ONES WE PROVIDE ONLY AS A GUIDE." 1 ,,"STAND MUCH CHANCE OF "; 1 ,,"PACE YOURSELF AND LEAVE TIME AT THE END FOR CHECKING." 1 ,,"MY DEAR ";A$;" DO "; 1 ,,"DO NOT FOOL YOURSELF BY ONLY ANSWERING THE EASY QUESTIONS." 1 ,,"Correct answer = ";C$ 1 ,,"CHECK THAT YOU HAVE ANSWERED THERIGHT NUMBER OF QUESTIONS." 1 ,,"CHECK THAT IT IS RECENT. (MANY SYLLABUSES HAVE CHANGED)" 1 ,,"BUT ABOVE ALL DO SUFFICIENT REVISION SO THAT YOU GO INTO THEEXAM ROOM FEELING "; 1 ,,"AS THE EXAMS APPROACH THEN 2 EVENINGS MAXIMUM PER WEEK OUT." 1 ,,"AND IN THE LAST FEW WEEKS...." 1 "YOUR FUTURE LIES WITH "; 1 "Which type of program converts mnemonics into machine code?" 1 "Which type of program converts machine code into mnemonics?" 1 "Which register in a C.P.U can behave as a normal register but in addition, perform arithmetic and logical operations?" 1 "Which peripheral device does LPRINT normally address?" 1 "Which of the following storage media can provide the highest baud rate for data transfer? (Key A to D) A) Disc B) Paper tape C) Punched card D) Magnetic tape" 1 "Which gate produces an output only when both inputs are different?" 1 "Which Basic command resets the pointer reading data statements?" 1 "Which BASIC command checks the contents of a saved program against the original program in RAM?" 1 "What is the output from an inverter, when it's input is setat 0 (Single digit answer)?" 1 "What is the output from a two input NAND gate when both inputsare 1 (Key 1 or 0)?" 1 "What is the name of the standardunit for data transmission in bits per second?" 1 "What is the mnemonic for the machine code equivalent of GOSUB?" 1 "What is the commonly accepted coding standard for the computeralphabet? (Key in abbreviation without full stops)" 1 "What is 32(DECIMAL) in hex.?" 1 "What does the R in ROM stand for?" 1 "What does the E in EPROM stand for?" 1 "What does the Boolean expressionA.1 equal?" 1 "What do we call the unit of timewhich is one second divided by one million?" 1 "USE THE REVISION NOTES INCLUDED AS EXAMPLES, NOT SUBSTITUTES FORYOUR OWN NOTES." 1 "USE OF VERIFY" 1 "USE OF DIM STATEMENT" 1 "To reserve RAM for an array which BASIC statement is used?" 1 "There are 50 questions (Approx. 1.2 minutes per question). " 1 "The CARRY BIT of one adder provides one of the inputs for the next." 1 "TRY TO STICK TO THIS + OR - 10 MINUTES." 1 "TRUTH TABLES-XOR GATES" 1 "TRUTH TABLES-MEANING OF" 1 "THEY DO NOT HAND OUT PASSES JUST BECAUSE YOU HAVE ATTENDED THE COURSE." 1 "THEN DO "; 1 "STORAGE-FLOATING POINT NUMBERS" 1 "STOP WATCHING THE TV. USE THE "; 1 "REMEMBER THAT EXAMINATIONS ARE COMPETITIONS AND ONLY THOSE WHO KNOW THE WORK WILL WIN THE PRIZEOF A PASS." 1 "REMEMBER A CLEARLY LABELLED DIAGRAM IS WORTH PAGES OF NOTES." 1 "RAM-MEANING OF" 1 "RAM stands for: A) Readable Accessible Memory. B) Random Access Machine. C) Randomly Alterable Memory. D) Random Access Memory." 1 "RAM CAPACITY AND BYTES" 1 "Press any key to start the exam." 1 "PROGRAMMING-USE OF RESTORE" 1 "PROGRAMMING-USE OF IF...THEN" 1 "PROGRAMMING-USE OF GOSUB" 1 "PROGRAMMING-USE OF FOR...NEXT LOOPS" 1 "PROGRAMMING-STRING VARIABLES" 1 "PROGRAMMING-NEGATIVE STEP J LOOPS AND INT" 1 "PROGRAMMING-MATHEMATICAL OPERATOR PRIORITY" 1 "PROGRAMMING-J LOOPS AND CALLING SUBROUTINES" 1 "PROGRAMMING-ADDITION OF STRINGS" 1 "PICK A SINGLE TOPIC EACH NIGHT." 1 "PERIPHERALS-PRINTER" 1 "OR GATES-SWITCHING ANALOGY" 1 "Normally, what is the maximum addressable memory for an 8 bit processor?" 1 "Neatness will help in obtaining accurate results. You may not use a calculator during the exam" 1 "NAND GATES-TRUTH TABLE" 1 "Machine code is a universal computer language - true or false?" 1 "MOST EXAM BOARDS ADVISE YOU ON HOW LONG TO SPEND PER SECTION." 1 "MICROSECOND-UNITS OF TIME" 1 "MICROPROCESSORS-BITS IN A BYTE" 1 "MEANING OF EPROM" 1 "MAKE YOUR NOTES INTERESTING-USE PLENTY OF COLOUR TO UNDERLINE THINGS(E.G.FORMULAE)THAT YOU PARTICULARLY WANT TO LEARN." 1 "MACHINE CODE-NATURE OF" 1 "MACHINE CODE-CALLING SUBROUTINES" 1 "LEAVE SOME TIME AT THE END FOR CHECKING 1) THAT YOU HAVE ANSWERED THE CORRECT SECTIONS 2) THE RIGHT NUMBER OF QUESTIONSC)CHECK FOR OBVIOUS ERRORS." 1 "LEARN THE KEY FACTS DIAGRAMS ANDFORMULAE." 1 "LANGUAGE LEVELS-MACHINE CODE" 1 "LANGUAGE LEVELS-BASIC" 1 "Is machine code a high or low level language?" 1 "Is BASIC a high or low level language?" 1 "In the following extract from a computer program, what is the final value for A? 10 FOR J=1 TO 10 20 LET A=0 30 LET A=A+1 40 NEXT J 50 LET A=((A+3)/2)*4" 1 "In the following extract from a computer program, what is N? 10 LET N=0 20 FOR J=40 TO 1 STEP-1 30 IF J=20 THEN LET N=INT(J/3) 40 NEXT J" 1 "In the following extract from a computer program, what is D$? 10 LET A$='PIE' 20 LET B$='APPLE' 30 LET C$=' ' 40 LET D$=B$+C$+A$" 1 "In the following extract from a computer program, what is N? 5 LET N=0 10 FOR J=1 TO 10 20 GOSUB 40 30 NEXT J 35 STOP 40 LET N=N+J 50 RETURN" 1 "In general computers have three buses - the DATA BUS and ADDRESSBUS are two of these, name the third." 1 "In flowcharts a diamond-shaped box represents: A) A process B) An input C) Printer output D) A decision (Key in A to D)" 1 "In computing there are generallytwo types of files: A) Random Access Files. B) ......... Files. Fill in the missing word." 1 "In Boolean algebra, what does the . represent in the expression A.B?" 1 "In Boolean algebra, what does the + represent in the expression A+B?" 1 "In Boolean algebra evaluate A+A." 1 "In Boolean algebra complete the following: A.A=?" 1 "In BASIC which command works in conjunction with FOR?" 1 "In BASIC what is a variable witha dollar sign called?" 1 "In BASIC what command would you use to call a subroutine" 1 "In BASIC what command is generally used in conjunction with IF?" 1 "IN THE COURSE TO CATCH UP." 1 "IF YOU WISH TO CHANGE AN ANSWER THEN DO SO CLEARLY IF THE MARKERCANNOT DECIPHER WHAT YOU HAVE WRITTEN THEN ZERO MARKS." 1 "IF THIS IS THE FIRST TIME YOU HAVE THOUGHT ABOUT REVISING THENWE SUGGEST YOU TRY PRAYER" 1 "How many bytes are there in 1K of computer memory?" 1 "How many bits wide is the address bus of an eight bit microprocessor?" 1 "How many bits are there in one byte (for the Z80 or 6502 processors?" 1 "HOWEVER IF YOU HAVE: " 1 "HEXADECIMAL CONVERSIONS" 1 "HEX AND 8 BIT BYTES" 1 "HARDWARE-MEANING OF ROM" 1 "HARDWARE-MAXIMUM ADDRESSABLE MEMORY" 1 "HARDWARE-INVERTING GATES" 1 "HARDWARE-ADDRESS BUS" 1 "Full floating point numbers are stored in two parts. The exponent is one part, what is the other." 1 "FUNCTIONS OF AN ASSEMBLER" 1 "FUNCTIONS OF ACCUMULATORS" 1 "FUNCTIONS OF A DISASSEMBLER" 1 "FLOWCHARTING--DECISIONS" 1 "FF represents the maximum HEX number that can be held in an 8 bit byte - true or false?" 1 "Express 139(BASE 10) in binary." 1 "Data can be transmitted in serial and ........ form. Fill in the missing word." 1 "DATA PROCESSING-TYPES OF FILES" 1 "DATA PROCESSING-TRANSMISSION OF DATA" 1 "DATA PROCESSING-STORAGE MEDIA AND DATA TRANSFER RATES" 1 "DATA PROCESSING--BATCHING VERSUSREALTIME" 1 "Complete the following Boolean expression: A+1=?" 1 "CONTROL BUS-FUNCTIONS OF" 1 "Batch processing means: A) Real-time processing B) Saving data until there is sufficient for a processing run C) Dividing data into groups with common features D) Linking computers together (Key in A to D)" 1 "BY CONDENSING FROM TEXT BOOKS AND FROM YOUR CLASS NOTES YOU WILL EXTRACT AND REMEMBER THE KEY FACTS." 1 "BOOLEAN ALGEBRA-SYMBOL FOR OR" 1 "BOOLEAN ALGEBRA-SYMBOL FOR AND" 1 "BOOLEAN ALGEBRA-SIMPLE EXPRESSIONS" 1 "BOOLEAN ALGEBRA-EVALUATION OF SIMPLE EXPRESSIONS" 1 "BOOLEAN ALGEBRA EVALUATION OF SIMPLE EXPRESSIONS" 1 "BOOLEAN ALGEBRA EVALUATING SIMPLE EXPRESSIONS" 1 "BINARY CONVERSIONS" 1 "BAUD RATES-DATA TRANSMISSION" 1 "Attempt all questions but do not guess. If you know the answer then type P (No backtracking is allowed)." 1 "An OR gate can be represented by: A) Two switches in series. B) One switch that is either on or off. C) Two switches in parallel. D) A switch in parallel and one in series." 1 "ASCII CODE-STANDARDS" 1 "ANSWER?"; 1 "ANSWER AS MANY PAST PAPERS AS YOU CAN GET HOLD OF." 1 "A thruth table is: A) A table showing inputs and internal states,for all possiblecombinations. B) A table showing internal states and outputs, for all possible combinations. C) A table showing outputs for all possible combinations of inputs. D) A table which gives true values if the inputs are true." 1 " You should complete the test within one hour. " 1 SCISOFT 1984": 1 O