09.Mock_Code_Optimization_Technique_v1.0

What statement is INCORRECT about memory management?

• Memory management is a form of human resource management
• Provide ways to dynamically allocate portions of memory to programs at their request, and free it for reuse when no longer needed​
• Optimize memory usage so the CPU can efficiently access the instructions and data it needs to execute the various processes
• Ensure blocks of memory space are properly managed and allocated so applications have the memory they need to carry out their operations​

What statement is correct about virtual memory systems​?

• The size of virtual address space must be less than cache memory
• The size of virtual address space must be less than random access memory (RAM)
• Allow the size of virtual address space beyond random access memory (RAM)
• None of the above

What levels do memory management operates at?

• Hardware
• Operating system​
• Program/Application
• All of the above

What statement is correct about memory management at application level​?

• Be controlled by hardware
• Be controlled by operating system
• When program requests memory for an object or data structure, the memory is only allocated if availability of adequate memory
• None of the above

What statement is correct about manual memory management​?

• Programmers use manual instructions to identify and deallocate unused objects, or garbage
• Application automatically manages the allocation and deallocation of memory​
• Programmers do not have to write code to perform memory management tasks when developing an application
• All of the above

What statement is correct about automatic memory management​?

• Application automatically manages the allocation and deallocation of memory​
• Programmers do not have to write code to perform memory management tasks when developing an application
• Automatic memory management​ can cause memory leaks
• All of the above

What are the possible causes of memory safety violations?

• Invalid memory access​
• Use uninitialized variable
• Destroy an object more than once
• All of the above

What statement is INCORRECT about memory leaks?

• An unused object is never released back to the free store​
• An object is stored in memory but cannot be accessed by the running code
• Memory leak does not effect to performance of computer
• None of the above

What techniques are used for manual memory management​?

• Garbage Collection​
• Caching strategy​
• Load balancing​
• None of the above

What techniques are used for automatic memory management​?

• Garbage Collection​
• RAII
• Reference Counting
• All of the above