$1.$ How many binary patterns can you create with $7$ bits?

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A$.128$

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B$.256$

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C$.512$

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D$.1024$

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E$.$ None of the above.

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$2.$ Which register keeps track of where the next instruction fetch comes from?

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A$.$ R$12$

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B$.$ R$13$

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C$.$ R$14$

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D$.$ R$15$

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E$.$ R$16$

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F$.$ None of the above.

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$3.$ If you are using a microprocessor with a $20-$bit address bus, and your memory chips are $256$k deep, which decoder would you use to completely decode the address space?

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A$.1$ of $8$

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B$.1$ of $4$

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C$.1$ of $2$

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D$.1$ of $16$

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E$.$ None of the above.

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$4.$ Which ARM instruction reads a byte$-$wide $(8-$bit$)$ value from memory?

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A$.$ STR

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B$.$ STRB

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C$.$ LDR

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D$.$ LDRB

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E$.$ None of the above.

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$5.$ Assume R$7$ contains $0$x$20000008.$ Which instruction would you use to load register R$4$ with the byte at $0$x$20000008?$

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A$.$ LDR R$4,$ #$20000008$

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B$.$ LDR R$4,[$R$7]$

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C$.$ MOVB R$4,$ R$7$

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D$.$ LDRB R$4,[$R$7]$

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E$.$ STRB R$4,[$R$7]$

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F$.$ None of the above

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$6.$ A while loop is a $\_\_\_\_$ loop.

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A$.$ pretest

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B$.$ post$-$test

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C$.$ midtest

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D$.$ None of the above.