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Which is not a typical program control instruction ?

  • A.BR
  • B.JMP
  • C.SHL
  • D.TST

Answer: C

SHL (shift left) is not a typical program control instruction: it is a data manipulation instruction of the shift group. The answer is (C).

BR (branch) and JMP (jump) are the unconditional transfers of control, and TST (test) is used to set the status bits on which a conditional branch depends. These belong to the program control group, so (A), (B) and (D) are wrong.

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