Digital Circuits Practice Test 1

1. Perform binary addition: 101101 + 011011 = ?

1001000

011010

1010100

101110

2. How many bits would be required to encode decimal numbers 0 to 9999 in straight binary codes?

3. When numbers, letters or words are represented by a special group of symbols, this process is called __________

Inverting

Encoding

Digitizing

Decoding

4. Code is a symbolic representation of __________ information.

Continuous

Analog

Both continuous and discrete

Discrete

5. The largest two digit hexadecimal number is ________

(FD)16

(FF)16

(EF)16

(FE)16

6. On subtracting (001100)2 from (101001)2 using 2’s complement, we get ____________

11010111

011101

1101100

11010101

7. Convert (214)8 into decimal.

(141)10

(142)10

(140)10

(130)10

8. An important drawback of binary system is ________

It requires sparingly small string of 1’s and 0’s to represent a decimal number

It requires large string of 1’s and small string of 0’s to represent a decimal number

It requires very large string of 1’s and 0’s to represent a decimal number

It requires small string of 1’s and large string of 0’s to represent a decimal number

9. A product term containing all K variables of the function in either complemented or uncomplemented form is called a __________

Maxterm

∑ term

Midterm

Minterm

10. The output of an EX-NOR gate is 1. Which input combination is correct?

A = 0, B’ = 1

A = 0, B = 1

A = 1, B = 0

A = 0, B = 0