Digital Science Interview Questions & Answers - Set 06 - ObjectiveBooks

# Practice Test: Question Set - 06

1. Conversion of hexadecimal number 93FA16 to it's binary number equivalent is
(A) 10010011111110102
(B) 100100111111101112
(C) 1100111111100112
(D) 1111100001112

2. The 1's compliment of binary number 11010 is:
(A) 00101
(B) 00010
(C) 00110
(D) 11101

3. The memory cell of a dynamic RAM is simpler and smaller than the memory cell of a ________ RAM.
(A) Volatile
(B) Static
(C) Semiconductor
(D) Bipolar

(A) Combinational logic circuits
(B) Sequential logic circuits
(C) Both of the above
(D) None of the above

5. How many outputs signals can a gate have?
(A) One
(B) More than one
(C) Two only
(D) None of the above

6. The control and arithmetic-logic sections are called the _______
(A) Block diagram
(B) Control Unit
(C) Input / Output Unit
(D) Central Processing Unit

7. The 2's compliment of binary number 0.01011 is:
(A) 1.10101
(B) 0.10101
(C) 1.10100
(D) 0.10100

8. Conversion of binary number 111112 to an octal number is
(A) 358
(B) 328
(C) 378
(D) 428

9. In which of the following adder circuits, the carry look ripple delay is eliminated?

10. Which of the following is a universal gate?
(A) AND
(B) OR
(C) EX-OR
(D) NAND

11. What does 4k represent?
(A) 4000
(B) 4096
(C) 40
(D) 400

12. Conversion of an octal number 1108 to its decimal number is
(A) 7010
(B) 7210
(C) 7310
(D) 11010

13. Which of the following logic expression is wrong?
(A) 1 + 0 = 1
(B) 1 + 1 = 0
(C) 1 + 0 + 1 = 1
(D) 1 + 1 + 1 = 1

14. A 2's-complement adder- subtracter can add or subtract binary numbers. Sign-magnitude numbers represent ________ decimal numbers, and 2's complements stand for _______ decimal numbers.
(A) Hexa, sign
(B) Sign, hexa
(C) Positive, negative
(D) Negative, positive

15. An OR gate has 6 inputs. How many input words are in its truth table?
(A) 16
(B) 32
(C) 64
(D) 128

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