# Practice Test: Question Set - 06

**1. Conversion of hexadecimal number 93FA**

_{16}to it's binary number equivalent is- (A) 1001001111111010

_{2}

- (B) 10010011111110111

_{2}

- (C) 110011111110011

_{2}

- (D) 111110000111

_{2}

**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

**4. Parallel adders are**

- (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 11111**

_{2}to an octal number is- (A) 35

_{8}

- (B) 32

_{8}

- (C) 37

_{8}

- (D) 42

_{8}

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

- (A) Half adder

- (B) Full adder

- (C) Parallel
adder

- (D) Carry-look-ahead
adder

**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 110**

_{8}to its decimal number is- (A) 70

_{10}

- (B) 72

_{10}

- (C) 73

_{10}

- (D) 110

_{10}

**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

**View All Answers**

**Next Tests:**