Digital Electronics Quiz -U1-U2

In the 2’s complement form, the binary number 10010011 is equal to the decimal number

• -19
• 109
• 91
• -109

The decimal number -34 is expressed in the 2’s complement form as

• 1011110
• 10100010
• 11011110
• 1011101

The binary number 11011101 is equal to the decimal number

• 121
• 221
• 441
• 256

The sum of 1111 + 1111 in binary equals

• 10000
• 2222
• 11110
• 11111

In a 4-variable Karnaugh map, a 2-variable product term is produced by

• a 2-cell group of 1s
• an 8-cell group of 1s
• a 4-cell group of 1s
• a 4-cell group of 0s

The number of boolean functions that can be generated by 3 variables is equal to

• 16
• 256
• 4
• 8

If (1235)x = (3033)y , where x and y indicate the bases of corresponding numbers, then

• X=7 and y=5
• X=8 and y=6
• X=6 and y=4
• X=9 and y=7

The range of signed decimal number that can be represented by 12-bit BCD

• 0 to 999
• 0 to 555
• -550 to 449
• -500 to 499

• 6

• 5

• 10

• 4

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