NPTEL Digital Circuits Week 9 Assignment Answers 2024
1. Which of the following statement is TRUE?
a) In a random-access memory, the access time depends on the location of the word.
b) In a random-access memory, the access time is independent of the location of the word.
c) In a sequential access memory, the access time is independent of the location of the word.
d) Access time is same for a location in both the random- and the sequential-access memories.
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2. A memory unit “1024 X 64” is specified by the number of words times the number of bits per word. How many address lines are needed for the given memory unit?
A) 8
B) 9
C) 10
D) 11
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3.
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4. The minimum number of transistors required to make a dynamic RAM cell is?
a) 1
b) 2
c) 3
d) 4
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5.
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6. Which of the following statements is FALSE?
A) SRAM memories has shorter READ and WRITE cycles compared to DRAM
B) DRAM memories has longer READ and WRITE cycles compared to SRAM
C) SRAM memories occupies minimal area compared to DRAM memories
D) SRAM memories occupies larger area compared to DRAM memories
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7. What is the ROM size when it has 16-bit address lines as input and 8-bit data lines as output?
A) 216 x 8 bits
B) 28 x 16 bits
C) 162 x 8 bits
D) 215 x 8 bits
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8. Which of the following statements is TRUE?
A) Hamming code can correct and detect only single bit errors
B) Hamming code can correct and detect up to two bit errors
C) Hamming code can correct and detect up to three bit errors
D) Hamming code can correct and detect up to four bit errors
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9. Which of the following technique is used to erase the data in EEPROM memory?
a) By heating the memory chip
b) Exposing to ultra-violet light
c) By applying an electrical signal
d) None of the above
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10. A 12-bit hamming code read from a memory location. This hamming code contains 8-bit data and 4-bit code word. What was the original 8-bit data word stored in the memory location if the 12-bit hamming code is (0011 1011 1110)2?
A) (1001 1110)2
B) (1101 1110)2
C) (1101 1101)2
D) (0010 1101)2
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11. In hamming code, how many check bits are required for a data word of 25 bits?
a) 4
b) 5
c) 6
d) 7
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12. Find the 12-bit hamming code for the given 8-bit data (1100 0011)2
A) (1101 1000 1100)2
B) (1010 1000 0011)2
C) (0101 0111 1100)2
D) (0010 0111 0011)2
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13. Which of the following statement is TRUE?
a) PAL has fixed AND array and fixed OR array
6) PAL has programmable AND array and fixed OR array.
c) PLA has fixed AND array and fixed OR array
d) PLA has programmable AND array and fixed OR array
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14. CPLD stands for__________________.
a) Combined programmable logic device
b) Complex programmable logic device
c) Complement programmable logic device
d) Complex permanent logie device
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15.
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