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Q1. _______is an abbreviation for binary digit.
(A 0 and 1
(B) Base
(C) Bit
(D) None of the above
Answer: (C) Bit
Q2. A microcomputer is a computer that uses a _ for its CPU.
(A) Chips
(B) Registers
(C) Microprocessor
(D) Vacuum tube
Answer: (C) Microprocessor
Q3. Conversion of hexadecimal number 1D7F16 to a decimal number is
(A) 755110
(B) 877110
(C) 555710
(D) 778110
Answer: (A) 755110
Q4. BCD numbers are useful whenever _ information is transferred into or out of a digital system.
(A) Decimal
(B) Binary
(C) ASCII
(D) Hexadecimal
Answer: (A) Decimal
Q5. Addition of 1101012 and 1011112 is
(A) 11001002
(B) 11010002
(C) 11101112
(D) 1100112
Answer: (A) 11001002
Q6. The term sum-of-products in Boolean algebra means
(A) The AND function of several OR functions
(B) The OR function of several AND functions
(C) The OR function of several OR functions
(D) The AND function of several AND functions
Answer: (B) The OR function of several AND functions
Q7. Which of the following is not functionally a complete set?
(A) AND, OR
(B) NAND
(C) NOR
(D) AND, OR, NOT
Answer: (A) AND, OR
Q8. The hexadecimal number system is widely used in analyzing and programming __
(A) Registers
(B) Chips
(C) Microprocessors
(D) Vacuum tube
Answer: (C) Microprocessors
Q9. Cyclic codes are used in
(A) Data transfer
(B) Continuously varying signal representation
(C) Arithmetic and logical computation
(D) None of the above
Answer:(B) Continuously varying signal representation
Q10. The fan-out capability of a digital building block can be defined as
(A) The number of inputs that one output can transmit to
(B) The amount of cooling required for fanning the air out
(C) The number of inputs that can transmit to one input
(D) The maximum power dissipation (heat generation) that the unit can stand
Answer: (A) The number of inputs that one output can transmit to
Q11. How many full adders are required to construct an m- bit parallel adder?
(A) m/2
(B) m-1
(C) m
(D) m+1
Answer: (C) m
Q12. If a microcomputer has a 64K memory, what are the hexadecimal notations for the first and last memory location?
(A) 0000, EEEE
(B) 0, 64
(C) 0000, FFFF
(D) 0000, 9999
Answer: (C) 0000, FFFF
Q13. Conversion of an octal number 31378 to it’s decimal equivalent is
(A) 163110
(B) 163210
(C) 153110
(D) 193110
Answer: (A) 163110
Q14. Instead of counting with binary numbers, a ring counter uses words that have a single high __
(A) Bytes
(B) Bit
(C) Gate
(D) Chip
Answer:(B) Bit
Q15. The m-bit parallel adder consists of:
(A) (m+1) full adders
(B) m/2 full adders
(C) m-1 full adders
(D) m full adders
Answer: (D) m full adders
Digital Computer Electronics MCQ – All Set
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