{"id":11998,"date":"2019-12-13T12:16:51","date_gmt":"2019-12-13T06:46:51","guid":{"rendered":"https:\/\/kseebsolutions.guru\/?p=11998"},"modified":"2021-07-02T15:36:51","modified_gmt":"2021-07-02T10:06:51","slug":"1st-puc-computer-science-question-bank-chapter-3","status":"publish","type":"post","link":"https:\/\/kseebsolutions.guru\/1st-puc-computer-science-question-bank-chapter-3\/","title":{"rendered":"1st PUC Computer Science Question Bank Chapter 3 Data Representation"},"content":{"rendered":"

You can Download Chapter 3 Data Representation Questions and Answers, Notes, 1st PUC Computer Science Question Bank with Answers<\/a> Karnataka State Board Solutions help you to revise complete Syllabus and score more marks in your examinations.<\/p>\n

Karnataka 1st PUC Computer Science Question Bank Chapter 3 Data Representation<\/h2>\n

1st PUC Computer Science Data Representation One Mark Questions and Answers<\/h3>\n

Question 1.
\nDefine number or numeral system.
\nAnswer:
\nIt is a system of naming or representing numbers, as the decimal system or the binary system.<\/p>\n

Question 2.
\nGive the classification of number systems.
\nAnswer:
\nNon-positional number system and Positional number system.<\/p>\n

Question 3.
\nWhat is non-positional number system?
\nAnswer:
\nAnon-positional number system does not rely on the position of the number, but rather symbols to dictate the value of a number.<\/p>\n

Question 4.
\nGive the drawback of non-positional number system.
\nAnswer:
\nNon-positional number system cannot be used to do arithmetic calculations effectively.<\/p>\n

Question 5.
\nWhat is positional number system?
\nAnswer:
\nIt is a system of writing numbers in which the position of a digit affects its value.<\/p>\n

Question 6.
\nMention any two positional number systems
\nAnswer:
\nDecimal number system and Binary number system.<\/p>\n

\"KSEEB<\/p>\n

Question 7.
\nWhat do you mean by the base of the number system?
\nAnswer:
\nThe radix or base is the number of unique digits, including zero that a positional numeral system uses to represent numbers.<\/p>\n

Question 8.
\nExpand BIT.
\nAnswer:
\nBinary digit.<\/p>\n

Question 9.
\nDefine MSB.
\nAnswer:
\nThe highest weight of the digit in a number is called Most Significant Bit.<\/p>\n

Question 10.
\nDefine LSB.
\nAnswer:
\nThe least weight of the digit in a number is called Least Significant Bit.<\/p>\n

Question 11.
\nWhat is the weight of the LSB in the octal number system?
\nAnswer:
\nThe weight of the LSB of an octal number system is 0.<\/p>\n

Question 12.
\nWhat is the weight of the MSB of the hexadecimal number system?
\nAnswer:
\nThe weight of the MSB of the hexadecimal number system is 15.<\/p>\n

Question 13.
\nWhat is the Decimal number system?
\nAnswer:
\nThe positional number system that has 10 digits which are 0,1,2,3,4,5,6,7,8 and 9 is called decimal number system. Decimal is also called base 10 because it has 10 digits.<\/p>\n

Question 14.
\nWhat is the binary number system?
\nAnswer:
\nA positional number system that has only 2 digits which are 0 and 1, is called a binary number system it is also called as base 2.<\/p>\n

Question 15.
\nWhat is octal number system?
\nAnswer:
\nA positional number system that has 8 digits which are 0,1,2,3,4,5,6 and 7 is called octal number system. It is also called a base 8.<\/p>\n

Question 16.
\nWhat is the hexadecimal number system?
\nAnswer:
\nA positional number system that has 16 digits which are 0,1,2,3,4,5,6,7,8,9, A, B, C, D, E, and F is called hexadecimal number system which is also called as base 16.<\/p>\n

Question 17.
\nHow are positive or negative signs of a number represented in the binary system?
\nAnswer:
\nAdd an extra digit at the front of the binary number, to indicate whether the number is positive or negative. This digit is called a sign bit.<\/p>\n

Question 18.
\nHow is negative number represented in binary number system?
\nAnswer:
\nA negative number is represented in binary number system by adding an extra digit 1 at the front of binary number.<\/p>\n

\"KSEEB<\/p>\n

Question 19.
\nExpand BCD.
\nAnswer:
\nBinary Coded Decimal.<\/p>\n

Question 20.
\nWrite the expansion of ASCII.
\nAnswer:
\nAmerican Standard Code of Information Interchange.<\/p>\n

Question 21.
\nExpand EBCDIC?
\nAnswer:
\nExtended Binary Coded Decimal Interchange Code.<\/p>\n

Question 22.
\nWhat is one\u2019s complement?
\nAnswer:
\nRepresenting a signed number with 1\u2019s complement is done by changing all the bits that are 1 to 0 and all the bits that are
\n0 to 1.<\/p>\n

Question 23.
\nWhat is two\u2019s complement?
\nAnswer:
\nRepresenting a signed number with 2\u2019s complement is done by adding 1 to the 1\u2019s complement representation of the number.<\/p>\n

1st PUC Computer Science Data Representation Two\/Three Marks Questions and Answers<\/h3>\n

Question 1.
\nWhat is the different between non-positional number system and positional number system?
\nAnswer:
\nThe non-positional number system consists of different symbols and each of these symbols represents a value irrespective of its position.
\nIn positional number system, each digit gets its value by its position in the digits.<\/p>\n

Question 2.
\nHow is a number represented in positional number system? Give an example.
\nAnswer:
\nThe decimal number 259 is represented as
\n2 \u00d7 10\u00b2 + 5 \u00d7 101<\/sup> + 9 \u00d7 100<\/sup>
\n= (2 \u00d7 100) + (5 \u00d7 10) +(9 \u00d7 1)
\n= 200 + 50 + 9 = 259.<\/p>\n

Question 3.
\nWrite the different types of positional number system.
\nAnswer:<\/p>\n

    \n
  • Decimal number system<\/li>\n
  • Binary number system.<\/li>\n
  • Octal number system.<\/li>\n
  • Hexadecimal number system.<\/li>\n<\/ul>\n

    Question 4.
    \nA binary number system is used in computers. Why?
    \nAnswer:
    \nComputer systems use electronic circuits which exist in only one of two states i.e., on a state or off state. The binary number system is a method of representing numbers that count by using combinations of only two numerals: zero (0) and one (1).<\/p>\n

    Question 5.
    \nWhat is the use of the hexadecimal number system?
    \nAnswer:
    \nThe larger binary digits are not easier to remember and work with. But the hexadecimal system is much easier to work with compared to dealing with 16 0s and 1 s in the binary system.<\/p>\n

    Question 6.
    \nWhat is 1\u2019s complement? Give an example.
    \nAnswer:
    \nRepresenting a signed number with 1\u2019s complement is done by changing all the bits that are 1 to 0 and all the bits that are
    \n0 to 1. For example, 1\u2019s complement of 1010100 is 0101011.<\/p>\n

    \"KSEEB<\/p>\n

    Question 7.
    \nWhat is two\u2019s complement? Give an example.
    \nAnswer:
    \nRepresenting a signed number with 2\u2019s complement is done by adding 1 to the 1\u2019s complement representation of the number. For example, 2\u2019s complement of 1010100 is
    \nStep 1: 1\u2019s complement of 1010100 is 0101011
    \n\"1st<\/p>\n

    Question 8.
    \nWhat are computer codes? Give an example.
    \nAnswer:
    \nIt is a set of symbols for representing characters. For example, most computers use ASCII codes to represent characters.<\/p>\n

    Question 9.
    \nWhy binary number code is used in computers?
    \nAnswer:
    \nThe term \u201cbinary\u201d means \u201ctwo\u201d. Thus, the binary number system is a system of numbers based on two possible digits – 0 and 1. Each binary digit, or \u201cbit\u201d, is a single 0 or 1, which directly corresponds to a single \u201cswitch\u201d in a circuit. Binary codes are used in computers because they are used to represent information in the digital world.<\/p>\n

    Question 10.
    \nWhat is the weighted code in the binary number system?
    \nAnswer:
    \nWeighted binary codes are those binary codes which obey the positional weight principle. Each position of the number represents a specific weight. Several systems of the codes are used to express the decimal digits 0 through 9. In these codes, each decimal digit is represented by a group of four bits.<\/p>\n

    Question 11.
    \nWhat are non-weighted codes? Give an example.
    \nAnswer:
    \nIn this type of binary code, the positional weights are not assigned. The examples of nonweighted codes are Excess-3 code and Gray code.<\/p>\n

    Question 12.
    \nWrite the binary equivalent of decimal 61.
    \nAnswer:
    \n\"1st
    \nQuestion 13.
    \nWrite the binary equivalent of decimal
    \nAnswer:
    \n28(10) = 11100(2)
    \n\"1st
    \n25(10) = 01(2)
    \n\"1st<\/p>\n

    Question 14.
    \nWrite the octal equivalent of decimal 65.
    \nAnswer:
    \n\"1st<\/p>\n

    Question 15.
    \nWrite the hexadecimal equivalent of decimal 345.
    \nAnswer:
    \n\"1st<\/p>\n

    Question 16.
    \nConvert 101101(2) to decimal.
    \nAnswer:
    \n\"1st
    \n32 + 8 + 4 +1 =45<\/p>\n

    Question 17.
    \nConvert 101110(2) to octal.
    \nAnswer:
    \n\"1st<\/p>\n

    Question 18.
    \nConvert 11001010(2) to hexadecimal.
    \nAnswer:
    \n\"1st
    \n8 + 4+1 = 13 in hexadecimal is D 8 + 2 = 10 in hexadecimal is A
    \nAnswer DA<\/p>\n

    Question 19.
    \nConvert 3257(8) to decimal
    \nAnswer:
    \n\"1st
    \n1536 + 128 + 40 + 7 = 1711(10)<\/p>\n

    Question 20.
    \nConvert 357(8) to binary.
    \n\"1st
    \nAnswer:
    \n011 101 111(2)<\/sub><\/p>\n

    Question 21.
    \nConvert 357(8)<\/sub> to hexadecimal.
    \nAnswer:
    \nStep 1 : 357(8)<\/sub> = 011 101 111(2)<\/sub>
    \nStep 2: 11101111… group of 4 binary digits from LSB is 1110(2)<\/sub> 1111(2)<\/sub>
    \n\"1st
    \n8 + 4 + 2 = 14(10)<\/sub> = E(16)<\/sub> 8 + 4+ 2+ 1 = 15(10)<\/sub> =F(16)<\/sub>
    \n= EF(16)<\/sub><\/p>\n

    Question 22.
    \nConvert FACE(16) to decimal.
    \nAnswer:
    \n\"1st
    \n61440 + 2560 + 192 + 14 = 64206(10)<\/sub><\/p>\n

    Question 23.
    \nWrite the sum of 1100(2)<\/sub> and 101(2)<\/sub>
    \nAnswer:
    \n1100(2)<\/sub> + 101(2)<\/sub> = 10001(2)<\/sub><\/p>\n

    Question 24.
    \nName the two types of ASCII codes.
    \nAnswer:
    \nASCII 7 bit and ASCII 8 bit are the two types.<\/p>\n

    Question 25.
    \nWhat is EBCDIC code?
    \nAnswer:
    \nEBCDIC (Extended Binary Coded Decimal Interchange Code is a binary code for alphabetic and numeric characters that IBM developed for its larger operating systems. In an EBCDIC file, each alphabetic or numeric character is represented by an 8-bit binary number. 256 possible characters (letters of the alphabet, numerals, and special characters) are defined.<\/p>\n

    1st PUC Computer Science Data Representation Five Marks Questions and Answers<\/h3>\n

    Question 1.
    \nWrite a short note on the number of systems.
    \nAnswer:
    \nIt is a system of naming or representing numbers, as the decimal system or the binary system. The number system is broadly classified into two types. Namely, positional and non-positional number systems.
    \n1. Non-positional number system:
    \nA non-positional number system does not rely on the position of the number, but rather symbols to dictate the value of a number. Roman number is a non-positional number system. Non-positional number system cannot be used to do arithmetic calculations effectively.<\/p>\n

    2. Positional number system:
    \nIt is a system of writing numbers in which the position of a digit affects its value. The Decimal number system and Binary number system are examples of a positional number system. The positional number system can be used to do arithmetic calculations effectively.<\/p>\n

    \"KSEEB<\/p>\n

    Question 2.
    \nWhat is the radix or base of a number system? Give the radix of different number systems.
    \nAnswer:
    \nThe radix or base is the number of unique digits, including zero that a positional numeral
    \nsystem uses to represent numbers.
    \n\"1st<\/p>\n

    Question 3.
    \nConvert 2567(10)<\/sub> = (?)(2)<\/sub> = (? )(8)<\/sub> = ( ? )(16)<\/sub>
    \nAnswer:
    \nBinary equivalent of 2567(10) is 101000000111(2)<\/sub>
    \n\"1st
    \nOctal equivalent of 2567(10)<\/sub> is 5007(8)<\/sub>
    \n2567(10)<\/sub> binary in broken into set of three bits is 101 000 000 111
    \n5(8)<\/sub> 0(8)<\/sub> 0 (8)<\/sub> 7(8)<\/sub>
    \nHexadecimal equivalent of 2567(10)<\/sub> is A07(16)<\/sub>
    \n2567(10)<\/sub> binary is divided into set of four bits is 1010 0000 0111
    \nA(16)<\/sub> 0(16)<\/sub> 7(16)<\/sub><\/p>\n

    Question 4.
    \nWrite a short note on binary arithmetic.
    \nAnswer:
    \nBinary arithmetic is essential part of all digital computers and many other digital system.
    \n1. Binary Addition:
    \nIt is a key for binary subtraction, multiplication, division. The four rules of the binary addition are.
    \n0 + 0 = 0
    \n0 + 1 = 1
    \n1 + 0 = 1
    \n1 + 1 = 0 with a carry bit 1.<\/p>\n

    2. Binary Subtraction:
    \nSubtraction and Borrow, these two words will be used very frequently for the binary subtraction.There are four rules of the binary substration. The four rules of the binary Subtraction are
    \n0 – 0 = 0
    \n0 – 1 = 0 with a borrow 1
    \n1 – 0 = 1
    \n1 – 1 = 0<\/p>\n

    Question 5.
    \nWrite a note on binary system complements.
    \nAnswer:
    \nComplements are used in the digital computers in order to simplify the subtraction operation and for logical manipulations. The two types of complements are 1\u2019s complement and 2\u2019s complement.
    \n1. 1\u2019s complement:
    \nThe 1 \u2019s complement of a number is found by changing all 1\u2019s to 0\u2019s and all 0\u2019s to 1\u2019s. This is called as taking complement or 1\u2019s complement. For example, 10101 is 01010 in 1\u2019s complement.<\/p>\n

    2. 2\u2019s complement:
    \nThe 2\u2019s complement of binary number is obtained by adding 1 to the Least Significant Bit (LSB) of 1 \u2019s complement of the number.
    \n2\u2019s complement = 1\u2019s complement + 1
    \nFor example, 10101(2)<\/sub>
    \n1\u2019s complement is 01010 and
    \n01010 + 1 = 01011 is 2\u2019s complement.<\/p>\n

    Question 6.
    \nExplain in brief binary subtraction using l\u2019s complement.
    \nAnswer:
    \nSubtraction with One\u2019s Complement:-
    \nWe can subtract the 5-bit binary numbers 01101(2)<\/sub> 13(10)<\/sub> and 01001(2)<\/sub> 9(10)<\/sub>by converting 01001(10)<\/sub> to its negative equivalent in 1\u2019s complement and adding this value to 011012<\/sub>.
    \n1. First, we need to convert 01001(2)<\/sub> to its negative equivalent in 1 \u2019s complement.
    \n\"1st
    \n2. To do this we change all the 1\u2019s to 0\u2019s and 0\u2019s to 1\u2019s. Notice that the most-significant digit is now 1 since the number is negative.
    \n\"1st
    \n3. Next, we add the negative value we computed to 011012<\/sub>. This gives us a result of 1000112<\/sub>.
    \n\"1st
    \n4. Notice that our addition caused an overflow bit. Whenever we have an overflow bit in 1\u2019s complement, we add this bit to our sum to get the correct answer. This gives us a final answer of 001002<\/sub> (or 410<\/sub>).
    \n\"1st<\/p>\n

    Question 7.
    \nExplain in brief binary subtraction using 2\u2019s complement.
    \nAnswer:
    \nSubtraction with Two\u2019s Complement:-
    \nWe can subtract the 5-bit binary numbers 011012<\/sub> (1310<\/sub>) and 010012<\/sub> (910<\/sub>) by converting 010012<\/sub> to its negative equivalent in 2\u2019s complement and adding this value to 011012<\/sub>.
    \n1. First, we need to convert 010012<\/sub> to its negative equivalent in 2\u2019s complement.
    \n\"1st
    \n2. To do this first we change all the 1s to 0s and vice versa.
    \n\"1st
    \n3. Then we add 1 to the number to obtain our negative equivalent. Notice that the most-significant digit is now 1 since the number is negative.
    \n\"1st
    \n4. Next, we add the negative value we computed to 011012<\/sub>. This gives us a result of 1001002<\/sub>. However, since we are only using 5-bit binary numbers, we discard the extra bit on the left side.
    \n\"1st
    \n5. This gives us a final answer of 001002<\/sub> (or 4).
    \n\"1st<\/p>\n

    \"KSEEB<\/p>\n

    Question 8.
    \nWrite a note on BCD and Excess-3 code.
    \nAnswer:
    \n1. Binary Coded Decimal (BCD) code:
    \nIn this code, each decimal digit is represented by a 4-bit binary number. BCD is a way to express each of the decimal digits with a binary code. In the BCD, with four bits we can represent sixteen numbers (0000 to 1111). But in BCD code only the first ten of these are used (0000 to 1001). The remaining six code combinations i.e. 1010 to 1111 are invalid in BCD. Justify<\/p>\n

    2. Excess-3 code:
    \nThe Excess-3 code is also called an XS-3 code. It is a non-weighted code used to express decimal numbers. The Excess-3 code numbers derived from the 8421 BCD code numbers adding (0011)2<\/sub> or (3)10<\/sub> to each codeword in 8421. The excess-3 codes are obtained as follows<\/p>\n

    \"1st<\/p>\n

    Question 9.
    \nWrite a note on ASCII and EBCDIC code.
    \nAnswer:
    \n1. ASCII code:
    \nASCII (American Standard Code for Information Interchange) is the most widely used coding system to represent data. ASCII is used on many personal computers and minicomputers. ASCII is a 7-bit code that permits 27<\/sup> = 128 distinct characters. The 128 different combinations that can be represented in 7 bits are plenty to allow for all the letters, numbers and special symbols. An eight-bit was added. This allowed an additional 128 characters to be represented. The extra 128 combinations are used for symbols such as \u00c7 \u00fc \u00e8 \u00a9, \u00ae, \u00c6, etc.<\/p>\n

    2. EBCDIC code:
    \n(Extended Binary Coded Decimal Interchange Code) Pronounced \u201ceb-suh-dick.\u201d The binary code for text as well as communications and printer control from IBM. This data code originated with the System\/360 and is still used in IBM mainframes and most IBM midrange computers. It is an 8-bit code
    \n(256 combinations) that stores one alphanumeric character or two decimal digits in a byte.<\/p>\n","protected":false},"excerpt":{"rendered":"

    You can Download Chapter 3 Data Representation Questions and Answers, Notes, 1st PUC Computer Science Question Bank with Answers Karnataka State Board Solutions help you to revise complete Syllabus and score more marks in your examinations. Karnataka 1st PUC Computer Science Question Bank Chapter 3 Data Representation 1st PUC Computer Science Data Representation One Mark …<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[81],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts\/11998"}],"collection":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/comments?post=11998"}],"version-history":[{"count":0,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts\/11998\/revisions"}],"wp:attachment":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/media?parent=11998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/categories?post=11998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/tags?post=11998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}