RAM

Question 1
Which of the following is a random access (primary) memory?
A
Disk
B
Tape
C
ROM
D
None
Question 1 Explanation: 
Disk ,Tape ,ROM are all permanent storage memory.
Question 2
How many 64Kx1RAM chips are required to provide a memory of size 256K bytes?
A
8
B
4
C
32
D
64
Question 2 Explanation: 
Question 3
If each address space represents one byte of storage space, how many address lines are needed to access RAM chips arranged in a 4 x 6 array, where each chip is 8K x 4 bits ?
A
13
B
15
C
16
D
17
Question 3 Explanation: 
From the given data
Each chip size is = 8K x 4 bits = 23 x 210 x 22 == 215 bits = 212 bits
Given chip array = 6 x 4 = 24 ( 24=16 and 25=32)
So the number bits required for the total chips are 5 bits.
So, total number of bits required = 12 + 5 = 17 bits
There are 3 questions to complete.

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