Electrical Engineering Answers

A computer employs RAM chips of 128 x 8 and ROM chips of 512 x 8. The computer system needs 

1K bytes of RAM, 2K bytes of ROM, and two interface units, each with two registers. A memory-mapped 

1/0 configuration is used. The two highest-order bits of the 16 bit address bus are assigned 11 for RAM, 

10 for ROM, and 01 for interface registers.

a. How many RAM and ROM chips are needed?

b. Draw a memory-address map for the system.

c. Give the address range in hexadecimal for RAM, ROM, and interface.

Explain the Comparison of 3 mapping techniques between main memory to cache memory in the 

tabular form. show how and from where CPU will access the word from the cache memory in each 

mapping technique with the help of diagram. Take the word number as per your roll no. for example if 

your roll no is 35 than you have to show how and from where CPU will access W35 from the cache 

memory in case of each mapping technique with the help of diagram. Assume the main memory size as 

16 KB, line size 128 bytes, cache size 1K bytes and k value is 4 .

 In the population, there are three major classes. People are classified into either class A (10% of the population), class B (60% of the population) or class C (30% of the population). When we pick samples from the population, we can apply (a) random sampling or (b) stratified sampling. Explain both sampling techniques using this scenario. (10%)

a. Design a sequential circuit with T flip-flops A and B and one input X. When X=0, the

state of the circuit remains the same. When X=1, the circuit goes through the state transitions

from 00 to 10 to 01 to 11, back to 00 and then repeats.

Design a sequential circuit with T flip-flops A and B and one input X. When X=0, the

state of the circuit remains the same. When X=1, the circuit goes through the state transitions

from 00 to 10 to 01 to 11, back to 00 and then repeats.

Explain the Comparison of 3 mapping techniques between main memory to cache memory in the

tabular form. show how and from where CPU will access the word from the cache memory in each

mapping technique with the help of diagram. Take the word number as per your roll no. for example if

your roll no is 35 than you have to show how and from where CPU will access W35 from the cache

memory in case of each mapping technique with the help of diagram. Assume the main memory size as

16 KB, line size 128 bytes, cache size 1K bytes and k value is 4 .

) Assume data in A= 0110. Give the operand in B and logic micro-operation for manipulating the

bits in A as follows:

a) selective set of two most significant bits of A.

b) selective complement of two least significant bits of A.

c) mask the two most significant bits of A.

Q3. Explain the Secondary Memory and its signification in computer system in detail with help of well

labeled diagrams?

(10 Marks)