4-66.
4-67.
4-68.
4-69.
4-70.
Used for temporary storage of data or memory
addresses.
1. A
2. B
3. C
4. D
These registers are used with branching condition
instructions to change the sequence of instruction
execution.
1. A
2. B
3. D
4. E
Enables a single instruction to be used to specify a
large number of operands indirectly.
1. A
2. B
3. C
4. D
In the general process of executing a machine
instruction, what are the major steps?
1.
2.
3.
4.
Write the instruction to memory, update the
program counter, translate the instruction, and
execute the instruction
Encode the instruction, execute the
instruction, update the program counter, and
read the instruction from memory
Increment the instruction register, update the
program counter, decode the instruction, and
execute the instruction
Read the instruction from memory, update the
program counter, translate the instruction, and
execute the instruction
Which of the following methods can be used to
change the sequence of program execution?
1. Stop and jump switches only
2. Program instructions only
3. Stop and jump switches and program
instructions
4-71 Command enables are generated by which of the
following parts of the general process of machine
instruction execution?
1. Fetch the instruction
2. Update the program counter
3. Translate the instruction
4. Execute the instruction
4-72. The computer executes instructions at two levels
or states. Data bits in what register are used to
select the instruction operating levels?
1. The index register
2. The program counter
3. The instruction register
4. The status indicating register
4-73. Interrupt processing instructions can be included
in which of the following types of programs?
1. Executive function programs
2. Application programs to solve a fire control
solution
3. Application programs to compute a sonobuoy
pattern
4. Both 2 and 3 above
4-74. Which of the following instructions can only be
performed in the executive state?
1. Add instructions
2. Subtract instructions
3. Privileged instructions that are part of
interrupts
4. Read instructions
4-75. What is the purpose of instruction operand
addressing?
1. To specify the location of the operand
2. To tell when to perform the instruction
3. To tell whereto obtain the instruction
4. To tell how to obtain the memory address of
the instruction
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