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 CS501 2010

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PostSubject: CS501 2010   Tue Jun 01, 2010 4:37 pm

MIDTERM EXAMINATION
Spring 2010
CS501- Advance Computer Architecture (Session - 5)

Time: 60 min
Marks: 38

Question No: 1 ( Marks: 1 ) - Please choose one
What is the instruction length of the SRC processor?

► 8 bits

► 16 bits

► 32 bits

► 64 bits


Question No: 2 ( Marks: 1 ) - Please choose one
Which one of the following is the memory organization of FALCON-E processor?

► 28 * 8 bits

► 216 * 8 bits

► 232 * 8 bits

► 264 * 8 bits


Question No: 3 ( Marks: 1 ) - Please choose one
“If P = 1, then load the contents of register R1 into register R2”.
This statement can be written in RTL as:

► R1 ¬ R2

► P: R1 ¬ R2

► P: R2 ¬ R1

► P: R2 ¬ R1, P: R1 ¬ R2


Question No: 4 ( Marks: 1 ) - Please choose one
The instruction ---------------will load the register R3 with the contents of the memory location M [PC+56]

►Add R3, 56
►lar R3, 56

►ldr R3, 56

►str R3, 56


Question No: 5 ( Marks: 1 ) - Please choose one
----------are faster than cache memory
►Accumulator register

►CPU registers

►I/O devices

►ROM



Question No: 6 ( Marks: 1 ) - Please choose one
P: R3 ¬ R5
MAR ¬ IR
These two are instructions written using RTL .If these two operations is to occur simultaneously then which symbol will we use to separate them so that it becomes a correct statement with the condition that two operations occur simultaneously?

► Arrow ¬

► Colon :

► Comma ,

► Parentheses ()


Question No: 7 ( Marks: 1 ) - Please choose one
Prefetching can be considered a primitive form of-------------
►Pipelining

►Multi-processing

►Self-execution

►Exception


Question No: 8 ( Marks: 1 ) - Please choose one
The processor must have a way of saving information about its state or context so that it can be restored upon return from the -------------
►Exception

►Function

►Stack

►Thread


Question No: 9 ( Marks: 1 ) - Please choose one

Which one of the following circuit design levels is called the gate level?

►Logic Design Level

►Circuit Level

►Mask Level

►None of the given


Question No: 10 ( Marks: 1 ) - Please choose one
__________ enable the input to the PC for receiving a value that is currently on the internal processor bus.
► LPC
► INC4
► LC
► Cout

Question No: 11 ( Marks: 1 ) - Please choose one
________ operation is required to change the processor’s state to a known, defined value.
► Change
► Reset
► Update
► None of the given

Question No: 12 ( Marks: 1 ) - Please choose one
There are _________ types of reset operations in SRC
► Two
► Three
► Four
► Five

Question No: 13 ( Marks: 1 ) - Please choose one
_____________ controller controls the sequence of the flow of microinstructions.
► Multiplexer
► Microprogram
► ALU
► None of the given

Question No: 14 ( Marks: 1 ) - Please choose one
FALCON-A processor bus has 16 lines or is 16-bits wide while that of SRC is __________ wide.

► 8-bits
► 24-bits
► 32-bits
► 64-bits

Question No: 15 ( Marks: 1 ) - Please choose one
Which of the following statement(s) is/are correct about Reduced Instruction Set Computer (RISC) architectures.
(i) The typical RISC machine instruction set is small, and is usually a subject of a CISC instruction set.
(ii) No arithmetic or logical instruction can refer to the memory directly.
(iii) A comparatively large number of user registers are available.
(iv) Instructions can be easily decoded through hard-wired control units.

► (i) and (iii) only
► (i), (iii) and (iv)
► (i), (ii) and (iii) only

► (i),(ii),(iii) and (iv)


Question No: 16 ( Marks: 1 ) - Please choose one
Which one of the following register holds the instruction that is being executed?







► Accumulator
► Address Mask
► Instruction Register
► Program Counter

Question No: 17 ( Marks: 2 )
Write the following statement of an Arithmetic Instruction using RTL.
If op-code is 0, the instruction is ‘add’. The values in register rb and rc are added and the result is stored in register rc


Question No: 18 ( Marks: 2 )
Given below are the various fields of an SRC instruction register.
a) operation code field : op<4..0>
b) target register field : ra<4..0>
c) operand, address index, or branch target register : rb<4..0>
d) second operand, conditional test, or shift count register: rc<4..0>

Rewrite these various fields of an SRC instruction, using the RTL.


Question No: 19 ( Marks: 2 )
How can you define microprogram?


Question No: 20 ( Marks: 3 )

What is the role of timing step generator in a processor?




Question No: 21 ( Marks: 3 )
What is the utility of reset operation and when it is required?


Question No: 22 ( Marks: 5 )
Write the Structural RTL description for un-conditional jump instruction for uni-bus data path implementation.

jump [ra+c2]
Question No: 23 ( Marks: 5 )
What function is performed by the reset operation of a processor? What are the two types of reset operations?
****************************************************************
CS501 SPRING MID-TERM PAPER REMEMBERANCE
There were 23 questions 1-14 are mcqs others are questions
Q : DEFINE HARD RESET AND SOFT RESET OPERATIONS IN SRC
Q : Write two pipelining problem and define them briefly.
Q : What information is provided by the addressing modes of some processors?
Q : eLEBORATE PRE-FATCHING CONCEPT?
Q : Write RTL functions and there was a rb +rc instruction.
Q : how we speed-up a computer?
Q : Write execution time of an instruction(there was a description too)
Q : Types of instructions
Q : How you represent register data field?


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