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CS401 Quiz No.2 Shared by Naaz Ahmad

Question # 1 of 10 ( Start time: 02:38:43 AM ) Total Marks: 1
In ___________, a zero is inserted from the right and every bit moves one position to its left with the most significant bit dropping into the carry flag.
Select correct option:
SHL
SAL
SAR
Both SHL and SAL


Question # 2 of 10 ( Start time: 02:42:06 AM ) Total Marks: 1
In string instructions, the mode is called auto-increment mode when:
Select correct option:
CX is set
ZF is cleared
DF is set
DF is cleared

Question # 3 of 10 ( Start time: 02:43:23 AM ) Total Marks: 1
Which bit of attribute byte represents the blue component of foreground color?
Select correct option:
0
1
2
3
 
Question # 4 of 10 ( Start time: 02:44:08 AM ) Total Marks: 1
REPE and REPNE prefixes are only meaningful with _____________.
Select correct option:
MOV
LODS
CMPS
STOS

Question # 5 of 10 ( Start time: 02:45:10 AM ) Total Marks: 1
After the execution of STOSWB, the CX will be:
Select correct option:
Incremented by 1
Decremented by 1
Incremented by 2
Decremented by 2

Question # 6 of 10 ( Start time: 02:46:19 AM ) Total Marks: 1
The reduction in code size and the improvement in speed are the two reasons why block processing instructions were introduced in the _______________ processor.
Select correct option:
8088
8085
8080
iAPX386

Question # 7 of 10 ( Start time: 02:47:24 AM ) Total Marks: 1
Conditional jumps can only ___________.
Select correct option:
far
short
near
long

Question # 8 of 10 ( Start time: 02:48:38 AM ) Total Marks: 1
_________ function decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack now pointed to by SP.
Select correct option:
POP
PUSH
RET
ADD
 
Question # 9 of 10 ( Start time: 02:49:45 AM ) Total Marks: 1
The execution of the instruction "mov word [ES : 160], 0x1230" will print a character on the screen at:
Select correct option:
First column of second row
Second column of first row
Second column of second row
First column of third row

Question # 10 of 10 ( Start time: 02:50:58 AM ) Total Marks: 1
SCAS compares a source byte or word in register AL or AX with the _____________ string element addressed by ES: DI and updates the flags.
Select correct option:
Source
Destination
Flag
Register


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