Exam Preparation Questions Digital Computer Electronics - Set 11 - ObjectiveBooks

# Practice Test: Question Set - 11

1. Binary means _______
(A) Three
(B) Four
(C) Ten
(D) Two

2. How many bits are required to encode all twenty six letters ten symbols, and ten numerals?
(A) 2
(B) 3
(C) 5
(D) 6

3. A flip-flop is a _______ element that stores a binary digit as a low or high voltage.
(A) Chip
(B) Bus
(C) I/O
(D) Memory

4. Conversion of decimal number 6710 to it's octal number equivalent is
(A) 1008
(B) 1038
(C) 1098
(D) 998

5. Conversion of an octal number 608 to binary number is
(A) 1100002
(B) 100112
(C) 11001112
(D) 11001102

6. An OR gate can be imagined as
(A) Switches connected in series
(B) Switches connected in parallel
(C) MOS transistors connected in series
(D) None of the above

7. The output of the following gate is 1 only if at least one of its inputs is 0.
(A) AND gate
(B) OR gate
(C) NAND gate
(D) NOR gate

8. In which code the successive code characters differ in only one bit position?
(A) Gray code
(B) Excess 3 code
(C) 8421 code
(D) Algebraic code

9. The radix of the binary number is:
(A) 3
(B) 1
(C) 2
(D) 10

10. With an RS latch a high S and low R sets the output to _______; a low S and a high R _______ the output to low.
(A) No change, set
(B) Race, high
(C) High, reset
(D) Set, reset

11. Which of the following is not true?
(A) 0 × 0 = 0
(B) 0 × 1 = 1
(C) 1 × 0 = 0
(D) 1 × 1 = 1

12. The ASCII
(A) Is a subset of 8-bit EBCDIC
(B) Is used only in Western Countries
(C) Is version II of the ASC Standard
(D) Has 128 characters, including 32 control characters

13. Conversion of binary number 11011001111110002 to hexadecimal number is
(A) D8F816
(B) A8B916
(C) 78916
(D) D9F816

14. Conversion of an octal number 1438 to its decimal number is
(A) 9010
(B) 97110
(C) 9910
(D) 10710

15. Which function positive logic is equivalent to OR function in negative logic?
(A) NOT
(B) AND
(C) OR
(D) NOR

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