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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