Compilers

Symbol Table Organization

Question 1
Marks : +2 | -2
Pass Ratio : 100%
_________ register keeps track of the instructions stored in program stored in memory.
AR (Address Register)
XR (Index Register)
PC (Program Counter)
AC (Accumulator)
Explanation:
Program Counter keeps track of the next instruction.
Question 2
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 3
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 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%
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 6
Marks : +2 | -2
Pass Ratio : 100%
Cache memory acts between __________
CPU and RAM
RAM and ROM
CPU and Hard Disk
None of the mentioned
Explanation:
It acts between CPU and RAM.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Generally Dynamic RAM is used as main memory in a computer system as it ____________
Consumes less power
Has higher speed
Has lower cell density
Needs refreshing circuitry
Explanation:
Because of higher speed it is Dynamic.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
In a vectored interrupt ____________
The branch address is assigned to a fixed location in memory
The interrupting source supplies the branch information to the processor through an interrupt vector
The branch address is obtained from a register in the processor
None of the mentioned
Explanation:
It branches to process the interrupt.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Write Through technique is used in which memory for updating the data ___________
Virtual memory
Main memory
Auxiliary memory
Cache memory
Explanation:
The answer is cache memory.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Logic X-OR operation of (4ACO) H & (B53F) H results __________
AACB
0000
FFFF
ABCD
Explanation:
Xoring the two operands we get FFFF.