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Welcome to the Low Level Software MCQs Page

Dive deep into the fascinating world of Low Level Software with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Low Level Software, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Low Level Software, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Reverse Engineering.

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Check out the MCQs below to embark on an enriching journey through Low Level Software. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Reverse Engineering.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Low Level Software. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Low Level Software MCQs | Page 25 of 30

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Q241.
What is a benefit of programs that run on virtual machines?

a.

They have better performance compared to native programs

b.

They can only be executed on a specific platform

c.

They are not affected by platform-specific issues

d.

They can theoretically be executed on any computer platform for which a compatible execution environment exists

Discuss
Answer: (d).They can theoretically be executed on any computer platform for which a compatible execution environment exists Explanation:Programs that run on virtual machines have the benefit of platform isolation, which means that because the program reaches the end user in a generic representation that is not machine-specific, it can theoretically be executed on any computer platform for which a compatible execution environment exists.
Q242.
What is a benefit of running a program on a virtual machine?

a.

Increased platform compatibility

b.

Decreased program speed

c.

Limited access to memory resources

d.

Reduced functionality

Discuss
Answer: (a).Increased platform compatibility Explanation:Running a program on a virtual machine allows for increased platform compatibility, as the program reaches the end user in a generic representation that is not machine-specific. This theoretically allows the program to be executed on any computer platform for which a compatible execution environment exists.
Q243.
What is garbage collection?

a.

An automated system that tracks resource usage and releases memory objects

b.

A type of virtual machine

c.

A feature found only on real silicon processors

d.

A program that verifies data type information

Discuss
Answer: (a).An automated system that tracks resource usage and releases memory objects Explanation:Garbage collection is an automated system that tracks resource usage and automatically releases memory objects once they are no longer in use. This is a feature commonly found on virtual machines that run programs.
Q244.
What is runtime type safety?

a.

A feature found only on real silicon processors

b.

A program that verifies data type information

c.

A type of virtual machine

d.

An automated system that tracks resource usage and releases memory objects

Discuss
Answer: (b).A program that verifies data type information Explanation:Runtime type safety is a feature of virtual machines that verifies data type information at runtime to ensure type safety is maintained throughout the program.
Q245.
What can virtual machines track to ensure memory safety?

a.

The exact length of each memory block and its usage throughout the application

b.

The type of processor being used

c.

The amount of memory available on the system

d.

The version of the operating system being used

Discuss
Answer: (a).The exact length of each memory block and its usage throughout the application Explanation:Virtual machines can track the exact length of each memory block and its usage throughout the application to ensure memory safety. This is because the virtual machine has access to accurate data type information and can verify that type safety is maintained throughout the program. In addition, some virtual machines can track memory accesses to ensure that they are legal, making sure that the program does not attempt to read or write beyond the end of a memory block.
Q246.
How do virtual machines differ from conventional binary programs?

a.

Each instruction in conventional binary programs is decoded and executed by hardware, while virtual machines perform their own decoding of program binaries.

b.

Virtual machines and conventional binary programs use the same decoding mechanism.

c.

Virtual machines only execute high-level languages, while conventional binary programs only execute low-level languages.

d.

Virtual machines cannot monitor or control the operations performed by a program.

Discuss
Answer: (a).Each instruction in conventional binary programs is decoded and executed by hardware, while virtual machines perform their own decoding of program binaries. Explanation:In conventional binary programs, each instruction is decoded and executed by hardware, while virtual machines perform their own decoding of program binaries.
Q247.
What enables virtual machines to have tight control over everything a program does?

a.

Virtual machines have their own bytecode format.

b.

Each instruction that is executed must pass through the virtual machine.

c.

Virtual machines perform their own decoding of the program binaries.

d.

Virtual machines can monitor and control any operations performed by the program.

Discuss
Answer: (b).Each instruction that is executed must pass through the virtual machine. Explanation:Each instruction that is executed by a program running on a virtual machine must pass through the virtual machine, enabling it to have tight control over everything the program does.
Q248.
What is the difference between bytecode and regular processor binary code?

a.

Bytecode is executed by virtual machines, while regular processor binary code is executed directly by hardware.

b.

Bytecode is a high-level language, while regular processor binary code is a low-level language.

c.

Bytecode is used only for web development, while regular processor binary code is used for all types of programming.

d.

There is no difference between bytecode and regular processor binary code.

Discuss
Answer: (a).Bytecode is executed by virtual machines, while regular processor binary code is executed directly by hardware. Explanation:Bytecode is executed by virtual machines, while regular processor binary code is executed directly by hardware.
Q249.
What are "direct execution processors"?

a.

Processors that can execute high-level programming languages without the use of a virtual machine.

b.

Processors that can execute low-level programming languages without the use of a virtual machine.

c.

Processors that can execute virtual machine bytecode without the use of a hardware processor.

d.

Processors that can execute both virtual machine bytecode and conventional binary programs.

Discuss
Answer: (a).Processors that can execute high-level programming languages without the use of a virtual machine. Explanation:"Direct execution processors" are processors that can execute high-level programming languages, such as Java bytecode, without the use of a virtual machine.
Q250.
What is the drawback of using interpreters for virtual machines?

a.

Limited compatibility with different operating systems

b.

Limited memory resources available for the program

c.

Reduced functionality of the program

d.

Reduced program speed

Discuss
Answer: (d).Reduced program speed Explanation:The major drawback of using interpreters for virtual machines is their performance. Interpreted programs run significantly slower than compiled programs since each bytecode instruction is separately decoded and executed by a program running under the real CPU, resulting in each bytecode instruction being translated into dozens of instructions on the physical CPU.
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