Description : Convert the decimal number 0.0625 to binary. 100) A) 0000.0111 B) 0000.1110 C) 0000.0011 D) 0000.0001
Last Answer : D) 0000.0001
Description : The BCD equivalent of decimal 109 is ________. 99) A) 1110 1011BCD B) 0001 0000 1001BCD C) 1110 1110 1100BCD D) 0001 0000 1101BCD
Last Answer : B) 0001 0000 1001BCD
Description : Convert the decimal number 14.875 to binary. 87) A) 1110.0111 B) 1110.1110 C) 1111.1011 D) 1100.1100
Last Answer : B) 1110.1110
Description : Convert the decimal number 12.125 to binary. 12) A) 1100.0110 B) 1110.0010 C) 1100.0010 D) 1010.1100
Last Answer : C) 1100.0010
Description : When signed numbers are used in binary arithmetic, then which one of the following notations would have unique representation for zero. (A) Sign-magnitude. (B) 1’s complement. (C) 2’s complement. (D) 9’s complement.
Last Answer : (A) Sign-magnitude.
Description : The sign magnitude representation of -1 is __________ a) 0001 b) 1110 c) 1000 d) 1001
Last Answer : Answer: d Explanation: The first leftmost bit i.e. the most significant bit in the sign magnitude represents if the number is positive or negative. If the MSB is 1, the number is negative else if it is 0, the number is positive. Here, +1=0001 and for - 1=1001
Description : Convert the binary number 0001.0010 to decimal. 121) A) 1.20 B) 1.40 C) 1.125 D)
Last Answer : C) 1.125
Description : The BCD equivalent of decimal 912 is ________. 60) A) 1001 0001 0010BCD B) 1001 1000 0001BCD C) 0111 1111 1110BCD D) 0010 001 1001BCD
Last Answer : A) 1001 0001 0010BCD
Description : Convert the decimal number 3.375 to binary. 132) A) 0101.1100 B) 0011.1010 C) 0011.0011 D) 0011.01
Last Answer : D) 0011.01
Description : Convert the decimal number 10.5 to binary. 92) A) 1100.1000 B) 1010.0101 C) 1010.1000 D) 1011.1000
Last Answer : C) 1010.1000
Description : Convert the decimal number 6.75 to binary. 14) A) 0110.1100 B) 0111.1100 C) 0110.0110 D) 0110.1010
Last Answer : A) 0110.1100
Description : The Gray code for decimal number 6 is equivalent to (A) 1100 (B) 1001 (C) 0101 (D) 0110
Last Answer : (C) 0101
Description : The excess-3 code of decimal 7 is represented by (A) 1100. (B) 1001. (C) 1011. (D) 1010.
Last Answer : Ans: D An excess 3 code is always equal to the binary code +3
Description : The binary equivalent of hexadecimal 16 is ________. 126) A) 01110000 B) 1100001 C) 0010011 D) 0001
Last Answer : D) 0001
Description : Which binary value equals 22? 84) A) 0100 B) 0001 C) 0010 D) 0011
Last Answer : A) 0100
Description : Which binary value equals 20? 72) A) 0100 B) 0001 C) 1000 D) 0000
Last Answer : B) 0001
Description : Which binary value equals 21? 65) A) 0100 B) 0010 C) 0001 D) 1000
Last Answer : B) 0010
Description : Which binary value equals 2-1? 61) A) 1.0000 B) 0.0010 C) 0.0001 D) 0.1000
Last Answer : D) 0.1000
Description : The 2’s complement of the number 1101110 is (A) 0010001. (B) 0010001. (C) 0010010. (D) None.
Last Answer : Ans: C 1’s complement of 1101110 is = 0010001 Thus 2’s complement of 1101110 is = 0010001 + 1 = 0010010
Description : The 2’s complement of the number 1101101 is (A) 0101110 (B) 0111110 (C) 0110010 (D) 0010011
Last Answer : (D) 0010011 Ans: D The 2’s complement of the number 1101101 is 0010011 (1’s complement of the number 1101101 is 0010010 2’s complement of the number 1101101is 0010010 + 1 =0010011)
Description : In one's complement arithmetic, if positive 7 is 0111, then negative 7 is ________. A) 1111 B) 1101 C) 1000 D) none of the above
Last Answer : 1101
Description : In a classful addressing, first four bits in Class A IP address is (A) 1010 (B) 1100 (C) 1011 (D) 1110
Last Answer : Answer: A,B,C,D
Description : For the 8-bit word 00111001, the check bits stored with it would be 0111. Suppose when the word is read from memory, the check bits are calculated to be 1101. What is the data word that was read from memory? (A) 10011001 (B) 00011001 (C) 00111000 (D) 11000110
Last Answer : (B) 00011001
Description : Consider the representation of six-bit numbers by two’s complement, one’s complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000?
Last Answer : Two’s complement, Sign and magnitude and one’s complement, Two’s complement and one’s complement
Description : What is the decimal value of 2-3? 74) A) 0.25 B) 0.75 C) 0.125 D) 0.8
Last Answer : C) 0.125
Description : What is the decimal value of 23? 27) A) 4 B) 8 C) 2 D) 6
Last Answer : A) 00010000
Description : The decimal equivalent of binary 1010000 is ________. 8) A) 9610 B) 8010 C) 7810 D) 8410
Last Answer : A) 9610
Description : Which of the following is the correct representation of a binary number? a) (124)2 b) 1110 c) (110)2 d) (000)2
Last Answer : Answer: d Explanation: The binary numbers should comprise only two digits 0 and 1. Also, for the base, the value should be 2 and it should be written as a subscript enclosing the entire number. Here, the fourth option gives the correct representation
Description : The input hexadecimal representation of 1110 is _______________ a) 0111 b) E c) 15 d) 14
Last Answer : Answer: b Explanation: In hexadecimal number system, 1110 = 15, which is represented by the alphabet E. Some representations are: A 10 B 11 C 12 D 13 E 14 F 15
Description : The code where all successive numbers differ from their preceding number by single bit is (A) Binary code. (B) BCD. (C) Excess – 3. (D) Gray.
Last Answer : Ans: D The code where all successive numbers differ from their preceding number by single bit is Gray Code. (It is an unweighted code. The most important characteristic of this code is that only a single bit change occurs when going from one code number to next.)
Description : Convert the binary number 10010.0100 to decimal. 103) A) 16.25 B) 18.25 C) 18.40 D) 24.50
Last Answer : B) 18.25
Description : Which numbering formats are really codes rather than true number systems? 96) A) hexadecimal and octal B) binary and octal C) decimal and binary D) BCD and ASCII
Last Answer : Which numbering formats are really codes rather than true number systems?
Description : How many unique numeric symbols are used in the decimal number system? 47) A) unlimited B) nine C) one D) ten
Last Answer : D) ten
Description : Convert the binary number 0000.1010 to decimal. 6) A) 0.10 B) 0.55 C) 0.50 D) 0.625
Last Answer : D) 0.625
Description : The decimal equivalent of Binary number 10101 is (A) 21 (B) 31 (C) 26 (D) 28
Last Answer : (A) 21
Description : The excess 3 code of decimal number 26 is (A) 0100 1001 (B) 01011001 (C) 1000 1001 (D) 01001101
Last Answer : Ans: B (26)10 in BCD is ( 00100110 ) BCD Add 011 to each BCD 01011001 for excess – 3
Description : The decimal equivalent of Binary number 11010 is (A) 26. (B) 36. (C) 16. (D) 23.
Last Answer : (A) 26.
Description : The hexadecimal number ‘A0’ has the decimal value equivalent to (A) 80 (B) 256 (C) 100 (D) 160
Last Answer : (D) 160
Description : The decimal equivalent of hex number 1A53 is (A) 6793 (B) 6739 (C) 6973 (D) 6379
Last Answer : (B) 6739
Description : What is the binary equivalent of the decimal number 368 (A) 101110000 (B) 110110000 (C) 111010000 (D) 111100000
Last Answer : (A) 101110000
Description : The 2’s complement of 15 is ____________ a) 0000 b) 0001 c) 0010 d) 0100
Last Answer : Answer: b Explanation: 2’s complement is obtained by adding 1 to the 1’s complement of the number. Here, Binary of 15 = 1111 1’s complement of 15= 0000 2’s complement of 15= 0000+1=0001
Description : Convert octal 12 to binary. 17) A) 010001 B) 001111 C) 001010 D) 001100
Last Answer : C) 001010
Description : Shifting a register content to left by one bit position is equivalent to (A) division by two. (B) addition by two. (C) multiplication by two. (D) subtraction by two
Last Answer : (C) multiplication by two.
Description : A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each. The maximum possible time required for change of state will be (A) 15 ns. (B) 30 ns. (C) 45 ns. (D) 60 ns.
Last Answer : Ans: A 15 ns because in synchronous counter all the flip-flops change state at the same time.
Description : Convert decimal 19 to octal. 130) A) 278 B) 218 C) 238 D) 178
Last Answer : C) 238
Description : The hexadecimal equivalent of decimal 88 is ________. 129) A) 6816 B) 5816 C) 5116 D) 551
Last Answer : B) 5816
Description : What is the decimal value of 20? 127) A) 2 B) 0 C) 1 D) 3
Last Answer : C) 1
Description : The decimal equivalent of the BCD value 0111 0110 1000 is ________. 124) A) 70810 B) 17210 C) 76810 D) 6871
Last Answer : C) 76810
Description : Convert octal 32 to decimal. 123) A) 3010 B) 2610 C) 1610 D) 3201
Last Answer : B) 2610