Computer Architecture

The truth table for a 2-input NOR gate is

• A

• B

• C

• D

The 2's complements of binary number 010111.1100 is

• 101001.1100

• 101000.0100.

• 010111.0011

• 101011.0011

In which of the following gates, the output is 1, if and only if at least one input is 1?

• NOR

• AND

• OR

• NAND

Which of the following gates are added to the inputs of the OR gate to convert it to the NAND gate ?

• NOT

• AND

• OR

• XOR

The truth table for a 2-input XOR gate is

• A

• B

• C

• D

Convert 380₁₀ to the hexadecimal number system

• 17C

• 17B

• 19C

• 18B

The decimal number 80 can be represented in BCD code as

• 1000 0001

• 0101 0000

• 0010 0001

• 1000 0000

Simplified form of the boolean expression (X + Y + XY) (X + Z) is

• X + Y + Z

• XY + YZ

• X + YZ

• XZ + Y

The Conversion of the binary number 11001011₂ to the decimal number system is.

• 303₁₀.

• 203₁₀

• 233₁₀

• 103₁₀

Convert (125)10 into (.................)8

• (178)8

• (179)8

• (125)8

• (175)8