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Memory management Analysis MCQ

1. Dynamic memory allocation occurs ________.

Assigns an address to the variable named ptr

A memory address

When a new variable is created at runtime

Created with the new operator

Answer

Correct Answer: When a new variable is created at runtime

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2. What is one of the advantages of Paging?

It does not suffer from external fragmentation.

Paper cuts.

It does not suffer from internal fragmentation.

Answer

Correct Answer: It does not suffer from external fragmentation.

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3. In CPP, dynamic memory allocation is done using ______________ operator.

Calloc()

Malloc()

New

Allocate

Answer

Correct Answer: New

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4. Which of the following is not a false statement about new operator?

All

It returns garbage value when memory allocation fails

It can’t be overloaded

It automatically computes the size of the data object

Answer

Correct Answer: It automatically computes the size of the data object

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5. What is the Process Input Queue?

A collection of processes on the disk that are waiting to be brought into memory for execution.

A collection of processes.

A collection of processes on the disk that have already executed.

Answer

Correct Answer: A collection of processes on the disk that are waiting to be brought into memory for execution.

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6. Can we allocate memory for the objects dynamically in CPP?

Yes

Answer

Correct Answer: Yes

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7. Which of the following is/are valid ways to allocate memory for an integer by dynamic memory allocation in CPP?

int *p = new int(100);

Int *p; p = new int; *p = 100;

Only 1,2

Int *p = NULL; p = new int; *p=100;

All

Answer

Correct Answer: All

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8. What is Swapping?

The process of moving a process within memory to backing store.

The process of moving a process to memory.

The process of moving a process within memory to and from the backing store.

Answer

Correct Answer: The process of moving a process within memory to and from the backing store.

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9. During dynamic memory allocation in CPP, new operator returns__________ value if memory allocation is unsuccessful.

Zero

False

None

NULL

Answer

Correct Answer: NULL

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10. Which of the following operators is used to release the dynamically allocated memory in CPP?

Free

Free And remove

Delete

Remove

Answer

Correct Answer: Delete

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11. What does Contiguous Memory Allocation suffer from?

Only External or Internal memory fragmentation.

The Bird Flu.

External and/or Internal memory fragmentation.

Answer

Correct Answer: External and/or Internal memory fragmentation.

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