cs401 solved mcq's and quiz fall 2010

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500 Solved mcq's of Cs401 can be downloaded from the attachment.
The execution of the instruction "mov word [ES : 160], 0x1230" will print a character on the screen at:
First column of second row
Second column of first row
Second column of second row
First column of third row

Which type of shif operation it is "The zero bit is inserted from the right and every bit moves one position to its left with the most significant bit dropping into the carry flag"
shl
sal
sar
both shl and sal


In XOR operation the output is 1 if
both inputs are same
both inputs are different
I and II
none of the above


Far jump is position relative.
true
false

After the execution of STOSWB, the CX will be:
Incremented by 1
Decremented by 1
Incremented by 2
Decremented by 2

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In And the out put only one if
Both inputs are 0
One is 0 and other is 1
Both are 1
None of the given

__________ transfers the word at the current top of stack (pointed to by SP) to the destination operand and then increments SP by two to point to the new top of stack.
push
pop
call
none of given


When the operand of DIV instruction is of 16-bits then implied dividend will be stored in
AX register
The concatenation of DX and AX
The concatenation of ES and AX
The concatenation of DS and BX

In near jump we jump any where within a segment.
true
false



In string instructions, the mode is called auto-increment mode when:
CX is set
ZF is cleared
DF is set
DF is cleared

How many characters standard ASCII has?

512
256
128
64
Which of the following is the pair of register used to access memory in string instructions?
DI and BP
SI and BP
DI and SI
DS and SI


RET do not pops the word at the top of the stack (pointed to by register SP) into the instruction pointer but increments SP by two.
true
false

The operations of placing items on the stack and removing them from there are called push and ret.
true
false

In a video memory, each screen location corresponds to:
8 byte
4 byte
2 byte
1 byte

The Operation of Push is if "we push ax" then SP<-- SP+2 [SP]<-- AX
true
false


The purpose of MOVS instruction is:
Move register to register
Move register to a memory location
Move a memory location to register
Move memory to memory



When the operand of DIV instruction is of 16 bits then implied dividend will be of
32 bit
64 bit
16 bit
8 bit

Parameters clears from the stack by the
caller
callee
caller and callee
none of given