Version B - COSC 1520 Test 1 Winter 2009 Part A[5 points...

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COSC 1520 Test 1, Winter 2009 Part A [5 points] – Enter a number in each space. Indicate the generation in which each of these hardware items was first used. [ ½ point each] card readers _____ 1 integrated circuits _____ 3 large scale integration _____ 4 magnetic core memory _____ 2 magnetic disk _____ 2 networking _____ 4 personal computer _____ 4 transistors (used as memory) _____ 3 transistors (used in main circuits) _____ 2 vacuum tubes _____ 1 Part B [7 points] – Complete the table. A pattern of binary digits can be interpreted in several different ways. Show how the pattern 01101000 translates using each of the following interpretations. [1 each] unsigned integer 104 integer in 2’s complement notation +104 integer in excess 128 notation -24 floating point notation +2 Hexadecimal notation 68 Octal notation 150 ASCII h Version B Page 1 of 5
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COSC 1520 Test 1, Winter 2009 Part C [8 points] – Circle the LETTER beside the correct answer. 1) ________________ replaces repeated characters with a flag character, the character being repeated, and the number of times it is repeated. a) Huffman encoding b) keyword encoding c) run length encoding d) spatial compression e) temporal compression 2) ________________ looks for differences between consecutive frames; spatial compression removes redundant information within a frame. a) Huffman encoding b) keyword encoding c) run length encoding d) spatial compression e) temporal compression 3) It is required to use a txt extension with a text file. a) True b) False 4) Sequential files can be stored on either magnetic tape or magnetic disk, but direct access files need a disk. a) True b) False 5) Sequential files mirror the sequential access of magnetic tape. a) True b) False
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