Suppose we change the Tiger language to use Ada's copy-in-copy-out parameter passingmechanism. If a parameter is declared with the keywords 'in out', it uses copy-in-copy-out. Otherwise, we use call-by-value as before. With copy-in-copy-out, the argument is copied into the parameter variable on entering the function. On function exit, the parameter is copied back out into the argument variable. Describe in detail which changes (if any) are necessaryto semantic analysis, escape analysis, activation records, and the intermediate representation.

Answers

Answer 1

If we change the Tiger language to use Ada's copy-in-copy-out parameter passing mechanism, there will be several changes that need to be made to the different aspects of the language.

Semantic Analysis:
Semantic analysis is the process of analyzing a program's meaning and checking for any semantic errors. In this case, the changes to parameter passing will require the semantic analyzer to check whether a parameter is declared with the keywords 'in out' and if so, apply the copy-in-copy-out mechanism. This will require a change in the semantic analyzer's rules for parameter passing.
Escape Analysis:
Escape analysis is the process of determining whether a variable can be accessed outside of its scope. With copy-in-copy-out, there is a potential for variables to escape their scope since the argument variable is being modified. Therefore, the escape analysis algorithm will need to be updated to handle the copy-in-copy-out mechanism.
Activation Records:
Activation records are used to keep track of the state of a function during its execution. With copy-in-copy-out, there will be additional steps involved in copying the argument variable to the parameter variable and then copying the parameter variable back to the argument variable on function exit. This will require an update to the activation record layout to include space for the parameter variable and a copy-in-copy-out flag.


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Related Questions

A model of living systems as whole entities which maintain themselves through continuous input and output from the environment, developed by ludwig von bertalanffy is known as?

Answers

A model of living systems as whole entities which maintain themselves through continuous input and output from the environment, developed by ludwig von bertalanffy is known as Systems theory.

what are the application of systems theory?

It is a theoretical framework to understand the working mechanism of an organization.

It is an entity where all the elements necessary to carry out its functions.

A computer is the best  example of showing the mechanism of system theory.

computer is a system which has many smaller sub-systems that have to work in coordinated manner.

These sub-systems are the processor, RAM, motherboard, hard drive and power supply.

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Tech A says that radial ply tires have much more flexible sidewalls than bias-ply tires because of their construction. Tech B says that bias-ply tires have a more durable construction than radial tires. Who is correct?

Answers

Answer:

Tech A and Tech B are correct

Explanation:

Tech A is correct because radial ply tires have more flexible sidewalls than radial tires due to the fact that radial tires make use of two or more layers of casing piles and are thus not much flexible.

Also, tech B is correct because bias-ply tires typically have more durable construction than radial tires

Which component in the alternator controls the strength of the magnetic field of the rotating magnet?
A- voltage regulator
B-diode assembly
C-rectifier assembly
D-a cooling fan

Answers

Answer:

A Voltage regulator

That force which is generated to cause current to flow in an electrical circuit. It is also referred to as electromotive force or electrical potential. Voltage is measured in volts. VOLTAGE REGULATOR - A device that controls the strength of a magnetic field produced by a generator or alternator

What are the three parts to the moonshot blueprint?

Answers

Answer:

Rather than just defining a vision or mission statement, we ask entrepreneurs to create a vision model, which combines three things: your core values, organizational purpose, and a big, hairy audacious goal (BHAG).

the bellman-ford shortest path algorithm works ____O on graphs with negative edge weights, but not negative edge weight cycles O only on graphs without cycles O on any graph O only on graphs with non-negative edge weights

Answers

The bellman-ford shortest path algorithm works on graphs with negative edge weights, but not negative edge weight cycles.

Define an algorithm.

A finite sequence of exact instructions is known as an algorithm in mathematics and computer science. Algorithms are frequently used to solve a class of particular problems or to carry out computations. For carrying out calculations and data processing, algorithms are used as specifications.

A method used to solve a problem or carry out a command is known as an algorithm. Algorithms are precise lists of instructions that, in either software or hardware-based routines, carry out predetermined actions step by step.

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You are getting ready to transport troops in an M1152 configured with cargo cover and troops seats. Which of the following should you do before starting out?

Answers

Answer:

I believe it would be to lower the troop seats.

Explanation:

Explain why a project team would choose to prepare a low-fidelity version of a Web site design using sticky notes

Answers

A project team may choose to prepare a low-fidelity version of a website design using sticky notes for several reasons:

Sticky notes allow for quick and easy changes. Since they are easy to move around and modify, the team can iterate on the design quickly, making adjustments and improvements without investing significant time or resources. This promotes an iterative design process, enabling the team to refine and enhance the design rapidly.Collaboration and Communication: Sticky notes facilitate collaboration and communication among team members. They can be easily placed on a whiteboard or a wall, allowing everyone to visualize and discuss the design together. Team members can share their ideas, suggestions, and feedback by directly manipulating the sticky notes, fostering effective communication and collaboration within the team.Low Cost and Accessibility: Sticky notes are affordable and readily available, making them a cost-effective option for creating prototypes. Compared to digital design tools or high-fidelity prototypes, sticky notes are inexpensive and accessible to all team members, regardless of their technical expertise. This inclusivity encourages participation from different stakeholders and promotes a diverse range of perspectives during the design process.Focus on Conceptual Design: Low-fidelity designs with sticky notes primarily focus on the conceptual aspects of the website, such as layout, content organization, and user flow. By avoiding intricate details or visual aesthetics, the team can concentrate on the fundamental structure and functionality of the design. This allows for early validation and testing of design concepts before investing significant time and resources in higher-fidelity prototypes.Emphasis on User Experience: Sticky notes enable the team to simulate user interactions and test the usability of the design. By physically moving and rearranging the sticky notes, the team can simulate user flows and assess the user experience. This hands-on approach allows for early identification of potential usability issues, leading to design improvements and a better user experience.

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The moisture content of a saturated clay is 160 %. The specific gravity of the soil solids Gs is 2.40. What are the wet and dry densities of the saturated clay? hints: what is the degree of saturation of a saturated soil?)​

Answers

Answer: 162.4

Sorry if you get it wrong :(

Explanation:

What is not a condition under which the malfunction indicator light or service engine light is turned off ?

Answers

The malfunction indicator light or service engine light is not switched off when the Powertrain Control Module Link is grounded.

A power-train control module (PCM), sometimes known as a control unit, is a motor vehicle component. The engine control unit (ECU) and transmission control unit are typically combined into one controller (TCU). On some vehicles, including many Chryslers, there are three different computers: the PCM, the TCU, and the Body Control Module (BCM). In general, these car computers are very dependable. In a car or truck, the PCM frequently regulates more than 100 variables. There are hundreds of different error codes that may appear and signify that a specific component of the car isn't working properly. The "check engine" light on the dashboard typically illuminates when one of these errors occurs.

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will mark brainliest if correct
When a tractor is driving on a road, it must have a SMV sign prominently displayed.

True
False

Answers

Answer: true

Explanation:

On a negatively grounded system, the
Jump Pack negative clamp should be
attached to the when engine starting.

Answers

Answer:

Explanation:

The positive (red) cable should be attached to the positive terminals on each battery. The negative (black) cable should have one end attached to the negative terminal of the dead battery, and one end grounded.

Start by connecting the positive (often red) clamps of the jumper cables to the positive terminals of your battery. These are often marked, but they can be hard to see. Be sure to look closely to ensure that you are connecting to the right portion of the battery.

What do we need in order for us to solve the customs duties?

Answers

Answer:

The purpose of Customs Duty is to protect each country's economy, residents, jobs, environment, etc., by controlling the flow of goods, especially restrictive and prohibited goods, into and out of the country.

For a 4-pole, 2-layer, d.c, lap-winding with 20 slots and one conductor per layer, the number of commutator bars is​

Answers

The number of commutator bars for a 4-pole, 2-layer, DC lap winding with 20 slots and one conductor per layer exists 20

What is lap winding in dc machine?

Lap Winding is one kind of winding with two layers, and it is used in electric machines. Every coil in the engine is allied in series with the one nearby coil to it. The applications of lap winding mainly contain low voltage as well as high current devices.

What are the benefits of lap winding?

Advantages of Lap Winding

The advantages of lap windings contain: This winding is necessarily needed for large current applications because it has more parallel paths. It is suited for low voltage and high current generators.

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The best way to check the efficiency of individual cylinders is:________.

Answers

Answer:

To run. The machine one at a time

Explanation:

1. The term lefty loosey, righty tighty is used to prevent what?

Answers

Answer:

Used to recall the direction a standard screw

IN general, a high-powered processor is not necessary for a computer that will be used primarily to check email and brwose the weba. trueb. false

Answers

a. True. Because these activities require very little processing power. A basic processor such as an Intel Celeron or AMD Athlon will be more than sufficient for most web browsing and email-checking tasks.

What is a processor?

A processor is a part of a computer that carries out operations and carries out instructions. It is in charge of carrying out the calculations and data manipulation necessary for a computer to work. It is the most crucial part of a computer system and is frequently referred to as the "brain" of the computer.

The processor contains an Arithmetic Logic Unit (ALU) which is responsible for carrying out arithmetic and logical operations. It also contains a Control Unit (CU) which is responsible for managing the flow of instructions and data to and from the various components of the computer.

The processor also contains a number of registers which are used to store intermediate results during calculations. The processor also contains several cache levels, which are used to store frequently accessed data and instructions in order to speed up the execution of programs.

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the p = 590 kn force acts through the centroid of the cross section.

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The P = 590 kN force acts through the centroid of the cross-section. This means that the force is applied at the geometric center of the cross-sectional area, resulting in a uniform distribution of stress throughout the section.

When a force acts through the centroid of a cross-section, it means that the force is evenly distributed throughout the entire section. In your case, the p = 590 kn force is acting through the centroid of the cross-section, which means that it is evenly distributed and not concentrated at any one point. This information is important in engineering and mechanics, as it can help determine the overall stability and strength of a structure or material.

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how do you dry items after a wash instawork

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Glassware should not be dried with a paper towel or compressed air since this can introduce fibres or other contaminants that can contaminate the solution. Glassware can typically be left on a shelf to air dry.

Microfiber is a synthetic material created by humans via a chemical technique. Materials like polyester, nylon polymers, or wood pulp are used to make it. Microfiber-made textiles are less likely to shrink and wrinkle than their natural fibre equivalents while yet feeling soft and enduring.

As a more affordable and easily mass-produced substitute for natural fibres, microfiber manufacture got its start. Although originally intended as a less expensive alternative to natural fibres, microfibre has transformed into a highly valued material because of its silky, streamlined appearance.

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All of these are part of the seat belt assembly EXCEPT the:
O latch plate
O D-ring
O retractor.
O cushion

Answers

Answer: Cushion
Explanation: All parts going together to form a seat belt except the cushion
The answer is the last one: cushion

What lives at layer 3 (the network layer) of the OSI model?

Answers

Layer 3 of the OSI (Open Systems Interconnection) model, known as the network layer, is responsible for providing end-to-end communication between hosts in different networks.

The network layer is responsible for routing and forwarding data packets across different networks, as well as handling addressing and logical connectivity.

The main entities that live at layer 3 (the network layer) of the OSI model include:

Routers: Routers are network devices that operate at the network layer and are responsible for forwarding data packets between different networks. They use routing tables and protocols to determine the best path for data packets to reach their destination across multiple networks.

IP (Internet Protocol): IP is a network layer protocol that provides logical addressing and routing functionality. It is responsible for assigning unique IP addresses to devices on a network, and for routing data packets based on those IP addresses.

ICMP (Internet Control Message Protocol): ICMP is a network layer protocol that is used for sending error messages and operational information about network conditions. It is often used for diagnostic purposes, such as ping and traceroute, to check the connectivity and status of network devices.

Network Addressing: Layer 3 is also responsible for assigning and managing IP addresses, which are used to uniquely identify devices on a network.

Subnetting and VLANs: Layer 3 may also involve subnetting and VLANs (Virtual Local Area Networks), which are used for network segmentation and management to improve efficiency and security.

In summary, layer 3 of the OSI model includes routers, IP, ICMP, network addressing, and other protocols and technologies that are responsible for routing, addressing, and logical connectivity in a network.

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You observe a car parked on the side of the road. If the car started to move, Which conclusion could you make?

Answers

Answer:

there is someone inside the car

Harry is using a backpack to carry all of his interior design supplies. He has his sketchbook, measuring tape, level, colored pencils, and water bottle placed in the main compartment of the bag. What risk is Harry taking by carrying his supplies like this?

A.
His level or sketchbook may mark or destroy his other items

B.
His measuring tape may leak ink on his sketchbook and other items

C.
His water bottle may leak or his colored pencils may mark items

D.
Harry isn’t taking any risk

Answers

I have a feeling it would be C.
The risk that Harry is taking by carrying his supplies in the main compartment of his backpack is that his water bottle may leak or his colored pencils may mark his other items. Therefore, option C is the correct answer.

which headphones should i get? which ones do u think looks good and which do u think has high quality? OFF TOPIC

Answers

The second one seems more high quality also there’s a bonus to it has noise cancelation so you won’t hear if there’s a fire in your house or if someone’s breaking in.

Early Christians in Rome and the Puritans in Elizabethan England are two examples of religious groups that were opposed to theatre on moral grounds. Group of answer choices True False

Answers

True. Both early Christians in Rome and the Puritans in Elizabethan England held moral objections to theatre and were known for their opposition to it.

They believed that theatre promoted immorality, idolatry, or sinful behavior, leading to a negative influence on society Both early Christians in Rome and Puritans in Elizabethan England held negative views towards theater due to their religious beliefs and moral objections. Early Christians viewed theater as promoting immoral behavior and idolatry, while Puritans considered it sinful and a form of entertainment that could lead to moral corruption. These religious groups saw theater as conflicting with their values and sought to discourage or ban its practice. Their opposition to theater demonstrates the historical existence of religious groups that condemned it on moral grounds.

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explain five problems faced by communities in kenya​

Answers

Answer:

1) Corruption and weak governance

2) pandemic related economic slowdown 3) Weakened consumer spending (leading to rising unemployment and poverty)

4) Lower public investment and fiscal austerity

5) Security

unemployment,
child labor,
HIV/AIDS epidemic,
and an education system in failure

A company that produces footballs uses a proprietary mixture of ideal gases to inflate their footballs. If the temperature of 230 grams [g] of gas mixture in a 15-liter [L] tank is maintained at 465 degrees Rankine [°R] and the tank is pressurized to 135 pound-force per square inch [psi], what is the molecular weight of the gas mixture in units of grams per mole

Answers

Answer:

The molecular weight of the gas mixture is 35.38 g/mol.

Explanation:

The molecular weight of the gas can be found using the following equation:

\( M = \frac{m}{n} \)

Where:

m: is the mass = 230 g

n: is the number of moles

First, we need to find the number of moles using Ideal Gas Law:

\( PV = nRT \)

Where:

P: is the pressure = 135 psi

V: is the volume = 15 L

R: is the gas constant = 0.082 L*atm/(K*mol)

T: is the temperature = 465 °R (K = R*5/9)

\(n = \frac{PV}{RT} = \frac{135 psi*\frac{1 atm}{14.6959 psi}*15 L}{0.082 L*atm/(K*mol)*465*(5/9) K} = 6.50 moles\)                

Finally, the molecular weight of the gas is:

\( M = \frac{m}{n} = \frac{230 g}{6.50 moles} = 35.38 g/mol \)

Therefore, the molecular weight of the gas mixture is 35.38 g/mol.

I hope it helps you!

What are baselines in geodetic control networks?

Answers

Baselines in geodetic control networks are a critical component of modern surveying and mapping. Baselines are defined as the straight-line distance between two points in a geodetic survey, which is used to create a reference system for all other measurements.

The baseline is then used to calculate distances and angles between other points, which can be used to create maps and survey data. Baselines are typically measured using a variety of methods, including satellite-based Global Positioning Systems (GPS), which provide highly accurate measurements. Geodetic control networks are used for a wide range of applications, including construction, mining, land management, and environmental studies.

By providing accurate, reliable data about the earth's surface, these networks are essential for effective management of natural resources and development projects. In summary, baselines in geodetic control networks are the fundamental building blocks that allow surveyors and mapping professionals to create accurate and reliable data about the earth's surface.

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Pls answer and I will give a like!

Pls answer and I will give a like!

Answers

Answer:

a

Explanation:

3. (20 marks) Assume the linear model for velocity, v(rho)=v
max

(1−rho/rho
max

). Consider a main road that is connected to an on-ramp. Cars can merge from the on-ramp onto the main road anywhere in the "merger zone" 0 max

/2, and the traffic on the main road has uniform density rho
max

/2. No other cars merge onto the main road in the future. Derive and solve the initial value problem for this situation. Sketch the solution for positive t. Give a brief physical explanation of what occurs after the merger. Hint: Consider the step up in density and the step down in density as separate problems. (b) Now suppose that traffic is continuously merging from the merger zone at a constant rate a>0, i.e., the flux from each point of the merger zone to the main road is a (and the total flux from the merger zone to the main road is ∫
0
100

adx=100a ). Derive, but do not solve, the partial differential equation for the traffic density rho(x,t) that describes this situation. Hint: Consider the change in the number of cars on segments of road N

(t) similar to the derivation of the Conservation Law in Lecture 2. You will need to consider road segments [x
1

,x
2

] that are (i) away from the merging zone, and (ii) within the merging zone.

Answers

To solve the initial value problem for the linear model for velocity v(rho) = v max (1 - rho / rho max), where cars can merge from the on-ramp onto the main road anywhere in the merger zone 0 <= x <= rho max / 2, and the traffic on the main road has uniform density rho max / 2 and no other cars merge onto the main road in the future, we can use the conservation law.

The conservation law states that if we consider a road segment [x1, x2], then the change in the number of cars on the segment is equal to the difference between the number of cars entering the segment and the number of cars leaving the segment. Therefore, d N/d t = a(x, t) - a(x + delta x, t) - v(rho)(rho(x, t)) + v(rho)(rho(x + delta x, t)), where delta x is the length of the road segment [x, x + delta x].

We will consider two cases,  (i) x1 and x2 are away from the merging zone, and (ii) x1 and x2 are within the merging zone. In case (i), a(x, t) = a(x + delta x, t) = 0, since no cars are merging onto the main road in the future and all cars are already on the main road. Therefore, we get d N/d t = - v(rho)(rho(x, t)) + v(rho)(rho(x + delta x, t)).

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Identify the branch of study each student should pursue.

Answers

Answer:

Explanation:

i took the test and screenshot it

Identify the branch of study each student should pursue.
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