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What should you put in register $a0 when using read string syscall?

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שאלה #134943

		The number of words you want to read from the user
		The maximum number of characters to read
		Code 8
done		An address to a buffer to store the result

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TRUE or FALSE: When using the read string syscall, you must allocate a buffer on the heap to store the read characters.

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שאלה #134944

done		FALSE
		TRUE

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What is the purpose of using the Stack in MIPS procedures?

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שאלה #134945

		To store global variables.
		To perform arithmetic operations.
		For dynamic memory allocation.
done		For storing and managing information related to procedure calls and returns.

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Review the following MIPS Assembly code snippet and choose the correct option regarding the number of instructions created by the assembler, considering pseudo-instructions: main: li $t0, 10 # load immediate move $t1, $t0 # move data blt $t1, $t0, label # branch on less than label: #

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שאלה #134946

		7
		4
		6
		3
done		5

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Which of the following best describes a leaf procedure in MIPS?

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שאלה #134947

done		A procedure that does not call any other procedure.
		A procedure that calls other procedures.
		A procedure that deallocates memory.
		The main procedure in the program.

נערך לפני חודש Sahar Eitam

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Which register convention is used to pass arguments to procedures in MIPS Assembly?

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שאלה #134948

done		$a0 to $a3
		$v0 to $v1
		$s0 to $s7
		$t0 to $t9

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TRUE or FALSE: The bne and beq instructions are the only branch instructions that are part of the MIPS ISA.

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שאלה #134949

		TRUEAll other branch instructions (blt, bge,
done		TRUE
		FALSE

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Why is memory management (memory allocation and deallocation) in the heap important?

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שאלה #134950

		To prevent unstable programs
		To utilize all avalaible space (minimize the number of small holes)
		To prevent memory leaks (running out of space)
done		All of the answers are correct

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In MIPS, what is the $sp register used for?

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שאלה #134951

done		To hold the stack pointer.
		To point to the heap.
		To point to the global variables.
		To store temporary data.
		To store return addresses.

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Below is a MIPS procedure with a mistake in spilling and restoring registers. Following the code is the multiple-choice question. .data array: .word 10, 20, 30, 40, 50 .text main: addi $sp, $sp, -12 # create space on the stack for three words sw $s0, 0($sp) # spill $s0 sw $s1, 4($sp) # spill $s1 jal proc # call the procedure lw $s0, 0($sp) # restore $s0 lw $s1, 4($sp) # restore $s1 addi $sp, $sp, 12 # restore the stack pointer li $v0, 10 # exit program syscall proc: li $s0, 0 # using $s0 la $s1, array # load base address of array into $s1 lw $t0, 0($s1) # load first element of array into $t0 add $s0, $s0, $t0 # add first element to sum jr $ra # return from procedure In the MIPS code snippet above, where is the mistake made in spilling and restoring registers?

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שאלה #134952

		$s0 and $s1 are spilled to incorrect addresses.
done		There is no mistake in spilling and restoring registers.
		$t0 register should have been spilled since it is being used in the proc procedure.
		The $sp register isn’t adjusted correctly after restoring $s0 and $s1.

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