Refresher Electronics(Comp)

MITRC – REFRESHER COURSE (ELECTRONICS)

Note: No erasure and use your Mongol 2 Time frame: 8:10 – 9:30 1. Convert 8.5016 - _____8 a. 10.24 b. 8.5 c. 1.5 d. 8. 24 2. What is the product of multiplying 101 to 100? a. 101002 b. 10100 c. 11000 d. 110002 3. What is the 7’s complement of 10357? a. 67427 b. 56317 c. 56327 d. 67437 4. With regards to the postulates of Boolean Algebra, what is the equivalent of x+1? a. x b. 1 c. 0 d. x 5. Binary 111111 is equivalent to: a. 64 b. 63 c. 128 d. 127 6. Boolean algebra is a set of elements, operations and unproved axioms or postulates is essentially based on: a. numbers b. truth c. logic d. symbols 7. In a digital system, the number level is: a. 2 b. 1 c. 3 d. 4 8. In a progression of 0, 1, 10, 11….what comes next after 11? a. 12 b. 120 c. 110 d. 100

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Digital Electronics and Computers

9. What is the main reason why digital computers uses complementary subtraction? a. it has very simple process b. it can handle negative number easily c. very easy to manipulate d. it requires simple circuitry 10. A logic gate is an electronic circuit which _____. a. works on binary algebra b. makes logical decision c. alternates between 1 and 0 d. allow the flow of current in a single direction 11. An XOR produces an output only when the inputs are______. a. same b. different c. high d. low 12.What is the basic DTL configuration? a. OR gate b. NOR gate c. AND gate d. NAND gate 13. TTL circuit configuration resembles what type of gate? a. OR gate b. NOR gate c. AND gate d. NAND gate 13. A digital counter has four flip flops then it can count up to decimal______. a. 4 b. F c. 8 d. 15 14. Emitter Coupled Logic (ECL) has a very fast switching speed as compared to the rest of logic families, what is then its typical switching time? a. 5 sec b. 5 millisec c. 5 microsec d. 5 nanosec 15. A gate in which all inputs must be low to get a high output is called a. AND gate b. NAND gate c. OR gate d. NOR gate


16. ______flip flop is used as latch. a. T b. D c. JK d. RS 17.Logic circuits can be sequential or combinational, what is the output of a sequential circuit? a. present input states b. past input states c. future input states d. past and the present input states 18. Which of the following circuits exhibits memory? a. OR b. NAND c. Bistable d. Astable 17. For a TTL gate, the recommended and standard fan out is _____. a. 5 b. 10 c. 15 d. 20 18. NAND gates can be used as ______gates. a. AND b. OR c. NOT d. all of the above 19. Phanastron is a ________. a. speed circuit b. toggle circuit c. data circuit d. delay circuit 20. To represent number 44 in binary, what is the number of bits required? a. 4 b. 5 c. 6 d. 7 21.Which of the following devices has several inputs and transmit it into a single output? a. counter b. decoder c. demultiplexer d. multiplexer 22.________can be used as parallel to series converter. a. counter b. decoder

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c. demultiplexer d. multiplexer 23.The square of octal number 23 is_______8. a. 529 b. 551 c. 650 d. 459 24. In a system with MOS devices, the main bus loading factor is likely to be: a. resistive b. current c. capacitive d. inductive 25. When a logic circuit rejects an unwanted signal, this is termed as______. a. logic levels b. noise margin c. power consumption d. propagation delay 26. What is a multi-wire connection between digital circuits? a. bus b. wire wrap c. multiplexed cable d. cable ribbon 27. A circuit that converts its input to its complement. a. inverter b. NOR gate with inputs tied together c. NAND gate with inputs tied together d. all of the above 28. How many NAND gates are needed to form an AND gate? a. 1 b. 2 c. 3 d. 4 29. A memory circuit has 8 address inputs has how many storage locations? a. 255 b. 256 c. 512 d. 511 30. What is the memory element that is used in clock sequential circuit? a. gates b. flip flop c. static RAM



d. read-only memory

d. EEPROM

31. Determine which of the following is a storage device? a. card readers b. CD-ROM c. diskettes d. magnetic tape

39. A variation of PROM wherein its stored data can be erased by electrical signals instead of ultraviolet light. a. EEPROM b. dynamic RAM c. RAM d. EPROM

32.________is a device that stays on once triggered and store one or two conditions as a digital circuit. a. gate b. latch c. integrator d. oscillator 33._____is a segment register which normally access variables in the program. a. extra b. stack c. data d. code 34._______is a kind of memory where only manufacturer can store program and has a group of memory locations each permanently storing a word. a. ROM b. SOS memory c. RAM d. Hard memory 35. A dynamic memory will store information a. as long as power is applied to the memory b. as long as power is applied and the memory is refreshed periodically c. even when power is not applied to the memory d. when power is applied at regular interval 36. A flipflop whose output is the same as its input. This is sometimes used as a delay element. a. RS flipflop b. D flipflop c. T flipflop d. JK flipflop 37. Memory whose contents are lost when electrical power is removed. a. non volatile b. volatile c. dynamic d. static 38. Sequential access digital memory uses what storage circuit? a. parallel register b. shift register c. dynamic RAM

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40. Diagram showing procedures that are followed and actions are taken is called. a. schematic diagram b. functional block diagram c. flow chart d. functional block diagram 41. What is this communication medium wherein programs are written in mnemonics? a. high level language b. low level language c. assembly language d. machine language 42. Among the following computer languages, what are high level languages? 1. FORTRAN 2. COBOL 3. BASIC 4. Pascal a. 1 and 2 only b. 1 , 2 and 3 only c. 1, 2 and 4 only d. 1, 2, 3 and 4 43. _______is a software that converts a high level language program into machine or assembly language. a. ALU b. Cross assembler c. Compiler d. CPU 44. What is the main purpose of the fetch cycle in a computer? a. obtain instruction b. obtain input data c. obtain memory data d. implement a specific operation 45 An instruction that causes a program to go to another task. a. Flip b. Sub c. Jump d. Move



46. An instruction that can move data from memory to the accumulator. a. Fetch b. Move c, Store d. Load

54. . It is the fastest nd the most expensive printer available a. laser printer b. band printer c. ink jet printer d. daisy wheel printer

47. An instruction that can move data from accumulator to memory. a. Fetch b. Move c, Store d. Load

55. Wichester drives are also known as________ a. floppy disk drive b. fixed disk drive c. hard disk drive d. CDROM 56. The computer worm that infected computer systems

48. The instructions and data in a computer system is referred to as: a. hardware b. software c. program d. CPU 49. A device that enables users to transmit computer data and fax messages along telephone lines. a. converter b. facsimile c. demodulator d. modem 50. In an E-mail communication, files are sent through_______. a. disk b. mailbox c. attachments d. cables 51. Microsoft was founded by Bill Gates and ________. a. Allen Paul b .Paul Allen c .George Robert d. Robert George 52. Who is the 31 st employee of Apple Computer and is consider the father of Macintosh a.Steve Jobs b. Bill Gates c. Kunichiro Oizumi d. Peter Scout 53. Pascal, a high level language was developed by? a. Blaise Pascal b. Nicklaus Wirth c. Kris Lawrence d. Clifford Berry

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world-wide in 10 minutes, making it the fastest computer ever known is called _____. a. Claw hammer b. Sledge hammer c. SLQ hammer d. Love virus

57. A program that has the ability to replicate itself to your system and send out hundred or thousands of copies of itself without attachments leaving a devastating effect a. computer virus b. bacteria c. worm d. Trojan Horse 58. It is a program that attached itself to other programs or files spreading from one computer to another leaving infections as it travels. a. computer virus b. bacteria c. worm d. Trojan Horse 59. _______are also known to create a backdoor on your computer that gives malicious users access to your system, possibly allowing confidential or personal information to be compromised. It appears to be a useful software but when activated the results vary. a. Earthworm b. Gallup virus c. Trojan Horse d. Blaster Worm 60. It is a virus that spreads in some types of MMS enabled phones through Bluetooth and MMS messages. It is a global phenomenon that affects all phones in the Symbian Operating System Series 60. a. Commvirus b. Commwarrior c. Commcell

MITRC – REFRESHER COURSE (ELECTRONICS) d. Love Bug 61. (Informative question) If your phone is affected by the no. 60 question virus, reformat your phone by keying: a. *#06# b. *#0000# c. *#7370# d. *#7245# 62. It is a known computer virus that is characterized by having your 200 MB hard drive shrinks down to 80 MB and slowly expanding again to 200 MB. a. Arnold Schwarzenneger virus b. Oprah Winfrey virus c. Bill Clinton virus d. Nike virus

Digital Electronics and Computers 68. The processor is an example of ___________. a. software b. hardware c. a program d. an output unit 69. Additional data and programs not being used by the processor is stored in: a. secondary storage b. output units c. input units d. the CPU 70. Which is not a professional computer job? a. system analyst b. data entry operator c. user d. programmer

63. What do you call the filter between a corporate network and the internet that keeps the corporate network secure from the intruders while giving corporate users unlimited access to the internet a.bandstop b. bandpass c. firewall d. firestorm

71. A system whereby computers and data storage are placed in dispersed locations is known as: a. centralized processing b. distributed data processing c. summarizing d. package software

64. When was the very first Beboputer Virtual Computer developed? a. 1996 b. 1995 c. 1997 d. 1998

72. Another name for available-for –purchase software. a. secondary software b. packaged software c. system software d. peripheral software

65. It is the largest internet search engine with over three billion pages and founded by Larry Page and Sergey Brin. a. Yahoo b. Google c. Yehey d. msn

73. An input device that translates motions of a ball rolled on a flat surface to the screen is the______. a. wand reader b. bar code reader c. keyboard d. mouse

66. It is the largest wireless Internet provider in the world. a. PBCOM b. Vodafone c. NTT DoCoMo d. Ciena Telecoms 67.World Wide Web(www) was made available in the internet in the summer of 1991 and was developed by: a. Tim Berners Lee b. Jet Lee c. Bill Gates d. Ray Tomlinson

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74. When all access and processing is done in one location, a computer system is said to be: a. networked b. centralized c. distributed d. linked 75. The most are___________. a. superminis b. supermainframes c. supermicros d. supercomputers

powerful

computers

MITRC – REFRESHER COURSE (ELECTRONICS) 76. A bus line consists of________. a. registers b. accumulators c. parallel data paths d. machine cycles 77. Another name for a logic chip. a. PROM b. microprocessor c. memory d. ROM 78. An emerging technology that provides nonvolatile memory chip is. a. flash memory b. CMOS c. PROM d. CISC 79. A pictorial screen symbol that represents a computer activity is_____. a. pointer b. icon c. touch screen d. MICR 80. The rate of screen refreshment is called. a. pixel speed b. bit map speed c. raster rate d. scan rate 81. Imaging uses what device to input data. a. scanner b. bar code reader c. microphone d. keyboard 82. A printer that forms characters from a series of dots is called______. a. dot-matrix b. MICR c. scanner d. laser printer 83. The density of data stored on magnetic tape is expressed as a. units per inch b. tracks per inch c. packs per inch d. bytes per inch 84. A disk pack within a sealed data module. a. back-up unit b. Haloster c. Winchester d. CD-ROM

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85. A way of physically organizing data on a disk pack to minimize to minimize seek time uses_____. a. sequential file b. cylinder method c. removable hard disk cartridge d. Winchester technology 86. Before a sequential file can be updated the transactions must first be________. a. numbered b. sorted c. labeled d. updated 87. Another name of operating environment is ______. a. page b. shell c. layer d. supervisor 88.. Assigning more sectors to outer disk tracks is called. a. zone recording b. data transfer c. randomizing d. sectoring 89. Processing transactions in groups is called. a. data transfer b. transaction processing c. head switching d. batch processing 90. It is the mechanism for reading or writing data on a disk is called a(n) a. track b. worm c. key d. access arm 91. During the development of a program, drawing a flow chart is a means to. a. plan the solution b. define the problem c. code the program d. analyze the problem 92. The process of detecting, locating and correcting logic errors is called_________. a. desk checking b. debugging c. translating d. documenting


93. A COBOL program has how many divisions. a. four b. five c. six d. seven 94.What is the very first high level language introduced? a. COBOL d. FORTRAN c. Pascal d. Ada 95. A fourth generation language used for database retrieval. a. high level language b. query language c. assembly language d. procedural language 96.The language Smalltalk is a. procedural oriented b. problem oriented c. document oriented d. object oriented 97. Loading the operating system into a personal computer is called. a. booting b. interrupting c. prompting d. paging 98. The process of allocating main memory to programs and keeping the programs in memory separate from each other is called. a. memory protection b. virtual storage c. memory management d. utility program 99. The computer that pioneered simple operating system interfaces. a. apple b. Microsoft c. Macintosh d. IBM 100. Microsoft’s operating environment is called. a. Unix b. Windows c. Linux d. MS DOS

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Refresher Electronics(Comp)

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