Compilers

Symbol Table Organization

Question 1
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 2
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 3
Marks : +2 | -2
Pass Ratio : 100%
The circuit used to store one bit of data is known as __________
Encoder
OR gate
Flip Flop
Decoder
Explanation:
Flip flop is 1 bit circuit.
Question 4
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 5
Marks : +2 | -2
Pass Ratio : 100%
An n-bit microprocessor has __________
n-bit program counter
n-bit address register
n-bit ALU
n-bit instruction register
Explanation:
N bit microprocessor has bit instruction register.
Question 6
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.
Question 7
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 8
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 9
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 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.