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# Combinational Logic Circuits Online Exam Quiz

Important questions about Combinational Logic Circuits. Combinational Logic Circuits MCQ questions with answers. Combinational Logic Circuits exam questions and answers for students and interviews.

### 1. When two or more inputs are active simultaneously, the process is called:

Options

A : first-in, first-out processing

B : priority encoding

C : ripple blanking

D : priority decoding

### 2. In a BCD-to-seven-segment converter, why must a code converter be utilized?

Options

A : No conversion is necessary.

B : to convert the 4-bit BCD into gray code

C : to convert the 4-bit BCD into 10-bit code

D : to convert the 4-bit BCD into 7-bit code

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

### 1. A magnitude comparator determines:

Options

A : A ? B and if A ? B or A >> B

B : A ? B and if A > B or A < b

C : A = B and if A > B or A < b

D : A ? B and if A < b or a > B

### 3. Select one of the following statements that best describes the parity method of error detection:

Options

A : Parity checking is best suited for detecting single-bit errors in transmitted codes.

B : Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.

C : Parity checking is not suitable for detecting single-bit errors in transmitted codes.

D : Parity checking is capable of detecting and correcting errors in transmitted codes.

Options

A : encoder

B : display

C : counter

D : decoder

### 5. A multiplexed display:

Options

A : accepts data inputs from one line and passes this data to multiple output lines

B : uses one display to present two or more pieces of information

C : accepts data inputs from multiple lines and passes this data to multiple output lines

D : accepts data inputs from several lines and multiplexes this input data to four BCD lines

### 6. One application of a digital multiplexer is to facilitate:

Options

A : code conversion

B : parity checking

C : parallel-to-serial data conversion

D : data generation

### 7. Most demultiplexers facilitate which of the following?

Options

B : single input, multiple outputs

C : ac to dc

D : odd parity to even parity

### 8. Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?

Options

B : dual octal outputs

### 9. A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):

Options

A : BCD matrix

B : display driver

C : encoder

D : decoder