Q. Match the following:

a) DB 1) used to direct the assembler to reserve only 10-bytes
b) DT 2) used to direct the assembler to reserve only 4 words
c) DW 3) used to direct the assembler to reserve byte or bytes
d) DQ 4) used to direct the assembler to reserve words

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Q. The directive used to inform the assembler, the names of the logical segments to be assumed for different segments used in the program is

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Q. The assembler directives which are the hints using some predefined alphabetical strings are given to

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Q. Which of the following is not a machine controlled instruction?

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Q. NOP instruction introduces

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Q. Which instruction cannot force the 8086 processor out of ‘halt’ state?

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Q. The instruction that unconditionally transfers the control of execution to the specified address is

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Q. The instructions that are used to call a subroutine from the main program and return to the main program after execution of called function are

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Q. Match the following:

A) MOvSB/SW 1) loads AL/AX register by content of a string

B) CMPS 2) moves a string of bytes stored in source to destination

C) SCAS 3) compares two strings of bytes or words whose length is stored in CX register

D) LODS 4) scans a string of bytes or words

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Q. The instruction that is used as prefix to an instruction to execute it repeatedly until the CX register becomes zero is

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Q. In the RCL instruction, the contents of the destination operand undergo function as

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Q. The instruction that performs logical AND operation and the result of the operation is not available is

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Q. The Carry flag is undefined after performing the operation

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Q. The mnemonic that is placed before the arithmetic operation is performed is

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Q. The ROR instruction rotates the contents of the destination operand to

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Q. The instruction that is used to convert the result of the addition of two packed BCD numbers to a valid BCD number is

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Q. The expansion of DAA is

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Q. The instruction in which adjustment is made before performing the operation is

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Q. Which of the following is a mnemonic?

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Q. In general, the destination operand of an instruction can be

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