Top 550+ Solved Digital Principles and System Design MCQ Questions Answer
Q. What is the indication of a short to ground in the output of a driving gate?
a. only the output of the defective gate is affected
b. there is a signal loss to all load gates
c. the node may be stuck in either the high or the low state
d. the affected node will be stuck in the high state
Q. Which of the following combinations of logic gates can decode binary 1101?
a. one 4-input and gate
b. one 4-input and gate, one inverter
c. one 4-input and gate, one or gate
d. one 4-input nand gate, one inverter
Q. The carry propagation can be expressed as
a. cp = ab
b. cp = a + b
c. all but y0 are low
d. all but y0 are high
Q. 3 bits full adder contains
a. 3 combinational inputs
b. 4 combinational inputs
c. 6 combinational inputs
d. 8 combinational inputs
Q. The basic building blocks of the arithmetic unit in a digital computers are
a. subtractors
b. adders
c. multiplexer
d. comparator
Q. In a sequential circuit, the output at any time depends only on the input values at that time.
a. past output values
b. intermediate values
c. both past output and present input
d. present input values
Q. The design of an ALU is based on
a. sequential logic
b. combinational logic
c. multiplexing
d. de-multiplexing
Q. If the two numbers are unsigned, the bit conditions of interest are the carry and a possible result.
a. input, zero
b. output, one
c. input, one
d. output, zero
Q. If the two numbers include a sign bit in the highest order position, the bit conditions of interest are the sign of the result, a zero indication and
a. an underflow condition
b. a neutral condition
c. an overflow condition
d. one indication
Q. The flag bits in an ALU is defined as
a. the total number of registers
b. the status bit conditions
c. the total number of control lines
d. all of the mentioned
Q. In parts of the processor, adders are used to calculate
a. addresses
b. table indices
c. increment and decrement operators
d. all of the mentioned
Q. In which operation carry is obtained?
a. subtraction
b. addition
c. multiplication
d. both addition and subtraction