Compilers

Symbol Table Organization

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The addressing mode used in an instruction of the form ADD X Y is ________
Absolute
Indirect
Index
None of the mentioned
Explanation:
This addressing mode is indexed.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
If memory access takes 20 ns with cache and 110 ns without it, then the ratio (cache uses a 10 ns memory) is __________
93%
90%
88%
87%
Explanation:
The answer is 90%.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
If the main memory is of 8K bytes and the cache memory is of 2K words. It uses associative mapping. Then each word of cache memory shall be __________
11 bits
21 bits
16 bits
20 bits
Explanation:
Each should be 8*2=16 bits.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
A Stack-organised Computer uses instruction of __________
Indirect addressing
Two-addressing
Zero addressing
Index addressing
Explanation:
Zero addressing modes are used in stack organised computer.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
When CPU is executing a Program that is part of the Operating System, it is said to be in __________
Interrupt mode
System mode
Half mode
Simplex mode
Explanation:
It is in System Mode.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
In signed-magnitude binary division, if the dividend is (11100)2 and divisor is (10011)2 then the result is _________
(00100)2
(10100)2
(11001)2
(01100)2
Explanation:
After division we get 20 which is 10100.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Cache memory works on the principle of _________
Locality of data .
Locality of memory
Locality of reference
Locality of reference & memory
Explanation:
Cache works on Locality of reference.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
In a program using subroutine call instruction, it is necessary ___________
Initialize program counter
Clear the accumulator
Reset the microprocessor
Clear the instruction register
Explanation:
It is mandatory to clear the instruction register.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Virtual memory consists of _________
Static RAM
Dynamic RAM
Magnetic memory
None of the mentioned
Explanation:
It does consist of static RAM.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
In a memory-mapped I/O system, which of the following will not be there?
LDA
IN
ADD
OUT
Explanation:
There is no LDA.