SIA Midterm Exam

It comprises of logic gates whose outputs at any time are determined directly from the present combination of inputs without any regard to previous inputs.

• arithmetic logic
• combinational circuit
• boolean algebra

The basic components of a combinational circuit are: input variables, _______, and output variables

• arithmetic logic
• logical operators
• logic gates

The simplified Boolean function is obtained from each ___.

• input
• output
• both input and output

The combinational circuit that performs the addition of two bits is called a ___.

• half adder
• Full adder
• semi adder

It needs two binary inputs and two binary outputs.

• Half-adder circuit
• Full-adder circuit
• Semi-adder circuit

The truth table for a half-adder is: 'x' and 'y' are the two inputs, and S (Sum) and C (Carry) are the ____.

• logic gates
• two inputs
• two outputs

The Carry output is '0' unless both the inputs are ___.

• 0
• 1
• both 0 and 1

This circuit needs three binary inputs and two binary outputs.

• Half-adder circuit
• Full-adder circuit
• Semi-adder circuit

The truth table for a full-adder is: o Two of the input variable 'x' and 'y', represent the two significant bits to be ____.

• added
• subtracted
• multiplied

In Full adder, The third input variable 'z', represents the carry from the previous _____ significant position.

• lower
• higher
• middle