BCD Question & Answers November 7, 2022 By WatElectronics This article lists 75 BCD MCQs for engineering students. All the BCD Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of BCD. BCD stands for binary coded decimal, used in electronic and computing systems. It has a base of 2 and a fixed of 4 or 8 bits with a sign bit overflow or error. The number form that BCD encodes is called the decimal form. This BCD encoding consists of 2 methods packed and unpacked. Masking and shifting operation is deployed during packed/unpacked BCD digit. In the unpacked type of BCD number decimal-based digit is considered as 1 byte which is in an encoded format and the remaining 4 bits have no value. A packed type of BCD number 2 decimal digits is encoded as 1 byte. This packed type of BCD benefits in terms of masking, less storage, and greater efficiency. They are deployed in Decimal computers, IBM system/360, and Digital Equipment VAX. The BCD-based counter uses LEDs to convey the binary-based values. 1). Which of the following number form does BCD encodes? Decimal Fraction Unit Both b and c None Hint Read more about BCD 2). Which of the following is the term used for 10 states BCD? Tetrades Hexades Decades None of the above None Hint 3). Which of the following is the application of BCD? Decimal computers IBM system/360 Digital Equipment VAX All the above None Hint 4). ___ is defined as 4 it binary value? Natural BCD Unnatural BCD Zero BCD None of he above None Hint 5). Which of the following are the methods used for BCD encoding? Packed Unpacked Zero packed Both a and b None Hint 6). ____ operation is deployed during packed/unpacked BCD digit? Shifting Masking Unmasking Both a and b None Hint 7). Which of the following is the representation of shift left? << >> >< None Hint 8). Which of the following is the representation of shift right? << >> >< None Hint 9). In which of the following type of BCD number decimal based digit is considered as 1 byte which is in encoded format and remaining 4 bits has no value? Unpacked Packed Unmasking Masked None Hint 10). In which of the following type of BCD number, 2 decimal digits are encoded as 1 byte? Unpacked Packed Unmasking Masked None Hint 11). Which of the following is the BCD type form of example 0000 1001 0000 0001? Unpacked Packed Unmasking Masked None Hint 12). Which of the following is the BCD type form of example 1001 0001? Unpacked Packed Unmasking Masked None Hint 13). Which of the following is the advantage of packed BCD? Greater efficiency Less storage Masking All the above None Hint 14). Which of the following is the base of binary? Base 2 Base 8 Base 10 Base 12 None Hint 15). Which of the following is the base of decimal? Base 2 Base 8 Base 10 Base 12 None Hint 16).Which of the following is the binary number representation of 9? 0011 0100 1001 1100 None Hint 17). Which of the following is the BCD representation of 357? 0011 0101 0111 1011 0101 0111 0011 0111 0111 0011 0101 1111 None Hint 18). Which of the following is the term for binary power? 2^n 8-4-2-1 2n Both a and b None Hint 19). In which of the following branch does BCD plays vital role? Digital Analog Both a and b Mechanical None Hint 20). Which of following is the first step of binary to bcd conversion step? Binary to decimal Decimal to BCD Decimal to Binary Binary to Hexa None Hint BCD MCQ for Exams 21). Which of following is the second step of binary to bcd conversion step? Binary to decimal Decimal to BCD Decimal to Binary Binary to Hexa None Hint 22). BCD based counter uses ___ to convey the binary based values? LEDs Resistors Capacitors Wires None Hint Read more about LED’s 23). Which of the following operations are performed using BCD? Addition Subtraction Multiplication Both a and b None Hint 24). Which of the following is the BCD addition output of 0,0? 0 1 X Both a and c None Hint 25). Which of the following is the BCD addition output of 0,1 or 1,0? 0 1 X Both a and c None Hint 26). Which of the following is the BCD addition output of 1,1? Both a and b None Hint 27). Which of the following is the BCD addition output of 111? 0 1 X Both a and b None Hint 28). Which of the following Processors provide BCD addition? Intel 8080 Zilog Z80 x86 All the above None Hint 29). Which of the following is the output for BCD subtraction 0000 0011 0101 0111 & 1001 0101 0110 1000? 1001 1000 1011 1111 1001 1000 1011 1011 1001 1000 1111 1111 1001 1001 1011 1111 None Hint 30). Which of the following is representation of ‘A’ in BCD? 1010 1011 1100 1101 None Hint 31). ___ number of bits store BCD? 2 5 4 8 None Hint 32). Which of the following is the representation of A16? 1110 1000 1011 1010 None Hint 33). Which of the following is the binary equivalent of 0? 0000 1010 1111 0011 None Hint 34). Which of the following is the formula of dividend? Divisor*Quotient+Reminder Divisor*Quotient-Reminder Divisor-Quotient+Reminder Divisor/Quotient+Reminder None Hint 35). Which of the following is the binary value of 3? 11 10 00 01 None Hint 36). Which of the following formula is correct? 1/1 =1 1/0 = infinite 0/1=0 All the above None Hint 37). Abbreviate BCD? Binary Code Decimal Binary Cut Decimal Binary Code Divide Bi Code Decimal None Hint 38). Identify the non reflective based code? BCD Grey 2124 5211 None Hint 39). Which of the following is the ASCII value of ‘a’? 0.01 0.097 0.065 0.2 None Hint 40). Which of the following is the ASCII value of A? 0.01 0.097 0.065 0.2 None Hint Read more about ASCII 41). Abbreviate ASCII? American standard code for information interchange American standard cut for information interchange American standard code for inter interchange Aim standard code for information interchange None Hint 42). ___ is the term used for expressing BCD digits? Nibble Bit Byte Symbol None Hint 43). ___ is the decimal based equivalent form of binary number 0.0111? -0.4375 0.5375 0.4375 43.75 None Hint 44). Which of the following in binary sequence has smallest positional based weight? MSB LSB GSB ZSB None Hint 45). ____ is used for simplifying boolen algebra type expression? K-map Algebra BCD Both a and c None Hint 46). K map is abbreviated as? Karnaugh map Kelvin map Knit map None of the above None Hint 47). K-map is ___ dimensional code? 1D 2D 3D 4D None Hint 48). Which of the following code fashion k-map is ordered? Gray code BCD Hexa All the above None Hint 49). SOP is implemented using ____ logic gates? AND OR NOT Both a and b None Hint 50). POP is implemented using ____ logic gates? AND OR NOT Both a and b None Hint BCD MCQ for Students 51). K-map is ___ type of representation? Graphical Pictorial UI All the above None Hint 52). Which of the following are the forms of K-map? Un-optimized Optimized Null Both and b None Hint 53). Which of the following is the representation of 0 in BCD? 0000 0001 0010 0100 None Hint 54). Which of the following is the representation of 1 in BCD? 0000 0001 0010 0100 None Hint 55). Which of the following is the representation of 2 in BCD? 0000 0001 0010 0100 None Hint 56). Which of the following is the representation of 3 in BCD? 0000 0001 0011 0100 None Hint 57). Which of the following is the representation of 4 in BCD? 0000 0001 0010 0100 None Hint 58). Which of the following is the representation of 5 in BCD? 0000 0001 0010 0101 None Hint 59). Which of the following is the representation of 6 in BCD? 0000 0001 0010 0110 None Hint 60). Which of the following is the representation of 7 in BCD? 0000 0001 0010 0111 None Hint 61). Which of the following is the representation of 8 in BCD? 0000 0001 1000 0111 None Hint 62). Which of the following is the representation of 9 in BCD? 0000 0001 1001 0111 None Hint 63). Which of the following is the representation of 10 in BCD? 0000 0001 1010 0111 None Hint 64). Which of the following is the representation of 11 in BCD? 0000 0001 1010 1011 None Hint 65). Which of the following is the representation of 12 in BCD? 0000 0001 1010 1100 None Hint BCD MCQ for Quiz 66). Which of the following is the representation of 13 in BCD? 0000 0001 1010 1101 None Hint 67). Which of the following is the representation of 14 in BCD? 0000 0001 1010 1110 None Hint 68). Which of the following is the representation of 15 in BCD? 0000 0001 1010 1111 None Hint 69). Which of the following is representation of 123 in BCD? 0001 0010 0011 0001 0010 1011 0101 0010 0011 0001 1010 0011 None Hint 70). Logic 1 is ____ power? High Low Null Zero None Hint 71). Logic 0 is ____ power? High Low Null Zero None Hint 72). Which of the following are basic logic gates? AND OR NOT All the above None Hint 73). Which of the following are the universal logic gates? XOR NOR NAND Both b and c None Hint 74). Which of the following are used while designing logic gates? Relay Optics Vacuum tubes All the above None Hint 75). Which of the following are compound logic gates? AOI OAI AAI Both a and b None Hint For More MCQsBCDK-map Please fill in the comment box below. Time's up
