Important questions about Digital Computer Electronics. Digital Computer Electronics MCQ questions with answers. Digital Computer Electronics exam questions and answers for students and interviews.

1. What logic function is produced by adding an inverter to the output of an AND gate?

Options

A : NAND

B : NOR

C : XOR

D : OR

2. Conversion of an octal number 143 8 to hexadecimal number is

Options

A : 63 16

B : 60 16

C : 50 16

D : 57 16

3. The memory cell of a dynamic RAM is simpler and smaller than the memory cell of a _____ RAM.

Options

A : volatile

B : static

C : semiconductor

D : bipolar

4. Conversion of decimal number 28 10 to it's octal number equivalent is

Options

A : 32 8

B : 40 8

C : 34 8

D : 36 8

5. The number of binary bits required to represent a hexadecimal digit is

Options

A : 3

B : 4

C : 6

D : 8

6. Conversion of an octal number 3137 8 to it's decimal equivalent is

Options

A : 1631 10

B : 1632 10

C : 1531 10

D : 1931 10

7. Why are digital circuits easier to design than analog circuits?

Options

A : they do not control electricity precisely over a wide range

B : they are made in the form of ICs

C : all elements of digital circuit are from the same family

D : they are smaller in size

8. A _____ is a group of devices that store digital data.

Options

A : circuits

B : register

C : variations

D : bit

9. A microprocessor has memory locations from 0000 to 3FFF. Each memory location stores 1 byte. How bytes can the memory store? Express this in kilobytes?

Options

A : 4,095, 4K

B : 16,384, 16K

C : 32,740, 32K

D : 46,040, 46K

10. Conversion of hexadecimal number 6B2 16 to it's binary number equivalent is

Options

A : 1111000110111 2

B : 011010110010 2

C : 0110011001111 2

D : 11111111 2

1. How many full and half-adders are required to add 16-bit numbers?

Options

A : 8 half-adders, 8 full-adders

B : 1 half-adders, 15 full-adders

C : 16 half-adders, no full-adders

D : 4 half-adders, 12 full-adders

2. Conversion of an octal number 73 8 to binary number is

Options

A : 110111 2

B : 111100 2

C : 110010 2

D : 111011 2

3. An odd-parity generator produces an odd-parity bit to go along with the data. The parity of the transmitted data is _____ An XOR gate can test each received word for parity rejecting words with _____ parity.

Options

A : odd, even

B : high, low

C : low, high

D : even, odd

4. A half-adder adds _____ bits

Options

A : 16

B : 8

C : 10

D : 2

5. The term sum-of-products in boolean algebra means

Options

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

6. A typical microcomputer may have up to 65,536 registers in its memory. Each of these registers, usually called a _____

Options

A : address

B : memory location

C : registers

D : chip

7. Conversion of binary number 10000000000 2 to decimal number is

Options

A : 1024 10

B : 1034 10

C : 1124 10

D : 1037 10

8. The 2-input XOR gate has a high output only when the input bits are _____

Options

A : even

B : different

C : low

D : high

9. A gate is a logic circuit with one or more input signals but _____ output signal.

Options

A : two

B : double

C : one

D : more than one

10. Conversion of decimal number 99 10 to it's binary number equivalent is