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Q1. Conversion of an octal number 1428 to binary number is
(A) 11000102
(B) 1101102
(C) 11000112
(D) 11011012
Answer: (A) 11000102
Q2. A NOR gate recognizes only the input word whose bits are _
(A) 0’s and 1’s
(B) 1’s
(C) 0’s
(D) 0’s or 1’s
Answer:(C) 0’s
Q3. Conversion of an octal number 1348 to a binary number is
(A) 0010110112
(B) 0011011002
(C) 0010111002
(D) 1100112
Answer: (C) 0010111002
Q4. The functional capacity for LSI devices is
(A) 1 to 11 gates
(B) 12 to 99 gates
(C) 100 to 10,000 gates
(D) More than 10,000 gates
Answer:(C) 100 to 10,000 gates
Q5. Which gates is known as universal gate?
(A) NOT gate
(B) AND gate
(C) NAND gate
(D) XOR gate
Answer: (C) NAND gate
Q6. A combinational logic circuit which generates particular binary word or number is
(A) Decoder
(B) Multiplexer
(C) Encoder
(D) De-multiplexer
Answer: (B) Multiplexer
Q7. A binary adder is a logic circuit that can add _ binary numbers at a time.
(A) Hundreds
(B) Thousands
(C) One
(D) Two
Answer: (D) Two
Q8. Small-scale integration, abbreviated refers to fewer than 12 gates on the same chip. Medium-scale integration (MSI) means 12 to 100 gates per chip. And large-scale integration (LSI) refers to more than gates per chip.
(A) SSI, 75
(B) SSI, 100
(C) SSI, 1000
(D) SSI, 10000
Answer: (B) SSI, 100
Q9. Conversion of decimal number 9910 to it’s binary number equivalent is
(A) 11000112
(B) 1000112
(C) 11100012
(D) 11110002
Answer: (A) 11000112
Q10. A combinational logic circuit which is used to send data coming from a single source to two or more separate destinations is called as
(A) Decoder
(B) Encoder
(C) Multiplexer
(D) De-multiplexer
Answer: (D) De-multiplexer
Q11. A byte is consist of __ bits
(A) Two
(B) Four
(C) Eight
(D) Ten
Answer: (C) Eight
Q12. The maximum count which a 6-bit binary word can represent is
(A) 36
(B) 63
(C) 64
(D) 65
Answer: (B) 63
Q13. Resistor Ratio design is used in linear ICs because
(A) Ratios increase input resistance
(B) Ratios increase amplifier gain
(C) Precise resistor values are not possible with IC processes
(D) None of the above
Answer: (C) Precise resistor values are not possible with IC processes
Q14. What logic function is obtained by adding an inverter to the output of an AND gate?
(A) OR
(B) NAND
(C) XOR
(D) NOR
Answer: (B) NAND
Q15. Conversion of an octal number 1368 to hexadecimal number is
(A) 7E16
(B) 5E16
(C) 5A16
(D) 5D16
Answer: (B) 5E16
Digital Computer Electronics MCQ – All Set
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