ECAT Computer Science Online Test With Answers

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ECAT Computer Science Online Test

Sr. # Questions Answers Choice
1 The number 10000 would appear just immediately after. FFFF (hex) 1111 (binary) 7777 (octal) all of the above
2 The number A9D in Hexadecimal system is equivalent to which number in binary system. 101010111101 101010011101 101110011101 101010011111
3 1268+ 4258= __________ 111101011<sub>2</sub> 101101001<sub>2</sub> 101101011<sub>2</sub> 101100011<sub>2</sub>
4 AB16+ CD16= ________ 101111010<sub>2</sub> 101111000<sub>2</sub> 101111110<sub>2</sub> 101101000<sub>2</sub>
5 The number A9D in Hexadecimal system is equivalent to which number in decimal system. 2727 2648 3717 2717
6 The number ABC in Hexadecimal system is equivalent to which number in decimal system. A x 100 + B x 10 + C x 1 10 x 100 + 11 x 10 + 12 10 x 16 + 11 x 16 + 12 10 x 256 + 11 x 16 + 12
7 The binary number 101000101011 is equal to the hexadecimal number A2D C2D A2B B2C
8 The binary number 10011101 is equal to the hexadecimal number. 9E 9F 9D FF
9 Octal number system uses the digit 0 to 7. The equivalent of Octal 126 in decimal system is. 80 82 86 84
10 What is the octal equivalent of the binary system :10111101.? 675<sub>8</sub> 275<sub>8</sub> 572<sub>8</sub> 573<sub>8</sub>
11 Number 37510is equivalent in binary system to. 101110101 100110101 101110111 101110011
12 Binary number 10101101 is equivalent in decimal form to. 170 171 173 174
13 Four-digit binary number 1011 is represented in the decimal system by. 7 9 11 13
14 9710(decimal) in octal number system is equivalent to. 136<sub>8</sub> 140<sub>8</sub> 139<sub>8</sub> 141<sub>8</sub>
15 1258(octal) in decimal equivalent is equal to. 83<sub>10</sub> 84<sub>10</sub> 85<sub>10</sub> 86<sub>10</sub>
16 The digits used for hexadecimal number system are. A through Z 1 through 16 0 through 15 0 through 9 and A through F
17 Alphanumeric characters are expressed in terms of binary codes. In ASCII (American standard Code for Information Interchange) each character is represented as a 8 bit code 4 bit code 5 bit code 7 bit code
18 The main advantage of hexadecimal number is the case of conversion from hexadecimal to. ASCII code binary octal decimal
19 The hexadecimal number system is widely used in analyzing and programming in. analog computers binary computers decimal computers micro computers
20 Base 8 is often used in computing because. there are 8 bit in a byte calculations become easier by using base 8 electronic circuits can be made econmically it can represent long strings of binary 1's an 0's in a more compact form
21 The reason why computers have been designed to use binary numbers is. computer circuits have to handle 2 binary digits rather than 10 electronic components, by their very nature, operate in a binary mode everything that can be done with a base of 10 can also be done in binary all of the above
22 A letter, number, or a special character is represented by a. bit kilobyte byte megabyte
23 Data items are generally classified into which type of codes Numeric Alphanumeric Character All of the above
24 Data is represented on a computer by means of a two-state on/off system called the octal system the binary system a word ROM
25 A bar code reader is an example of a(n). processing device storage device Input device output device
26 A graph prepared by a computer. Is its output Is the piece of information to user Is a hard copy All of the above
27 A hard disk can be backed up efficiently using. WORM a transaction file a tape backup system zoning
28 A computer that accepts handwritten input on a screen. minicomputer desktop computer mainframe pen-based computer
29 A way of physically organizing data on a disk pack to minimize seek time uses. sequential file removable hard the cylinder method Winchester technology<div><br></div>
30 The most commonly used character code/s transmission is/are EBCDIC ASCII both EBCDIC and ASCII nethier EBCDIC and ASCII
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