Define static chain, static_depth, nesting_depth, and chain_offset. Approaches used to implement dynamic scope is/are? Dynamic Scoping. Conceptually, dynamic scope results if access links point to the same activation records that control links do. Deep Access. . 17. There are two ways to implement access to non-locals under dynamic scope: "deep access" and "shallow access", described below. . Shallow access: c. Non-local access: d. Both a and b: View Answer Report Discuss Too Difficult! Describe the shallow-access method of implementing dynamic scoping. Dynamic scope is fairly easy to implement. In case of shallow access names and values are stored in a global table. The following two approaches to implementing dynamic scope bear some resemblance to the use of access links and displays, respectively in the implementation of lexical scope. Answer: (d). Problem Set Questions : 6. Describe the shallow-access method of implementing dynamic scoping. Approaches used to implement dynamic scope is/are? Describe the shallow access method of implementing dynamic scoping? Approaches used to implement dynamic scope is/are? 4. Implementing Dynamic Scoping •Deep Access: non-local references are . Both a and b. This is a property of the program text and is unrelated to the run-time call stack. Deep access Shallow access Non-local access Both a and b. Compiler Design Objective type Questions and Answers. Static scoping also makes it much easier to make a modular code as a programmer can figure out the scope . One variation of shallow access is to have a separate stack for each variable name in a complete program. Dynamic Scoping. Another option for implementing shallow access is to use a central table that has a location for each different variable name in a program. Shallow access is an alternative implementation method, not an alternative semantics. Answer: Shallow access is an alternative implementation method. Answer: Shallow access is an alternative implementation method. of the chain cannot be statically determined - Every activation record instance must have variable names. Problem Set. Describe the deep-access method of implementing dynamic scoping. Shallow access is an alternative implementation method, not an alternative semantics. One variation of shallow access is to have a separate stack for each variable name in a complete program. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. 17. What is the definition used in this chapter for "simple subprograms"? Problem Set Questions : 6. 7. The term deep access comes from the fact . In this scoping, a variable always refers to its top-level environment. What is the definition used in this chapter for "simple subprograms"? Using this approach, given a use of a non-local variable, control links are used to search back in the stack for the most recent AR that contains space for that variable. Deep Access Nonlocal references are found by searching the activation record instances on the dynamic chain Length of chain cannot be statically determined Every activation record instance must have variable names Shallow Access Put locals in a central place Methods: One stack for each variable name Describe the shallow-access method of implementing dynamic scoping. Describe the shallow-access method of implementing dynamic scoping. A directory of Objective Type Questions covering all the Computer Science subjects. Describe the shallow access method of implementing dynamic scoping? Describe the deep-access method of implementing dynamic scoping. In case of shallow access names and values are stored in a global table. Implementing Dynamic Scoping • Two possible ways to implement dynamic scoping are called deep access and shallow access • These are different from deep and shallow binding (different semantics) in that the semantics of dynamic scoping are unaltered by the access method Implementing Dynamic Scoping • Deep Access: non-local references are . 17. In the shallow-access method, variables declared in subprograms are not stored in the activation . Full text of publication follows: Decommissioning and remediation activities are subject to some common driving forces that influence the ability of decommissioning and remediation programs to achieve end-states that } Assume main calls sub2 which calls sub1 which calls sub2 which calls sub3 The run-time stack using deep access is shown to the right whereas the shallow access is shown below at the point where sub3 is active We see that v is from sub1 (the most recent sub1) and w is from sub2 * * * * Why does the FORTRAN approach not permit recursion? Implementing Dynamic Scoping. Implementing Dynamic Scoping • Deep Access: non-local references are found by searching the activation record instances on the dynamic chain - Length of the chain cannot be statically determined - Every activation record instance must have variable names • Shallow Access: put locals in a central place Describe the shallow-access method of implementing dynamic scoping. They bear resemblance to the use of access links and displays, respectively, in the implementation of the lexical scope. . Conceptually, dynamic scope results if access links point to the same activation records that control links do. Approaches used to implement dynamic scope is/are? It can only be determined at run-time. Conceptually, dynamic scope results if access links point to the same activation records that control links do. Describe the shallow-access method of implementing dynamic scoping. The semantics of deep access and shallow access are identical. To find an name's value, the program could traverse the runtime stack, checking each activation record (each function's stack frame) for a value for the name. (In fact, if you use Perl, you can test both ways almost at once, since it supports both; just use my for lexical scope, then do a find-and-replace to change it to local for dynamic scope. -Every activation record instance must have variable names •Shallow Access: put locals in a central place - One stack for each variable name - Central table with an . 16. There are two ways to implement access to non-locals under dynamic scope: "deep access" and "shallow access", described below. Answer: (d). Students also viewed these Computer science questions. Shallow Access • In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. Describe basic managerial approaches to implementing controls and how these are implemented. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. Deep Access. 17 Describe the shallow-access method of implementing dynamic scoping. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. How would this approach affect the time required for . Describe the shallow-access method of implementing dynamic scoping. 17. Deep reinforcement learning (RL) is an optimization-driven framework for producing control strategies for general dynamical systems without explicit reliance on process models. The semantics of deep access and shallow access are identical. Shallow access: c. Non-local access: d. Both a and b: View Answer Report Discuss Too Difficult! Using this approach, given a use of a non-local variable, control links are used to search back in the stack for the most recent AR that contains space for that variable. The semantics of deep access and shallow access are identical. What the task of a linker? Describe the shallow-access method of implementing dynamic scoping. Describe the shallow-access method of implementing dynamic scoping. Deep Access. 17. In case of shallow access names and values are stored in a global table. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. Deep Access Nonlocal references are found by searching the activation record instances on the dynamic chain Length of chain cannot be statically determined Every activation record instance must have variable names Shallow Access Put locals in a central place Methods: One stack for each variable name The following 2 approaches to implementing dynamic scope : 1. 17. A directory of Objective Type Questions covering all the Computer Science subjects. Static Scoping: Static scoping is also called lexical scoping. 17. Static Scoping: Static scoping is also called lexical scoping. What are two possible approaches to implementing shallow access methods? a. Deep access: b. Describe the deep-access method of implementing dynamic scoping. the problems with that approach •Static links are stored in a single array called a display . Shallow Access: put locals in a central place . Shallow access is an alternative implementation method, not an alternative semantics. 2. There are two ways to implement access to non-locals under dynamic scope: "deep access" and "shallow access", described below. 17 Describe the shallow-access method of implementing dynamic scoping. Using this method, space is allocated for every variable name that is in the program (one space for variable temp though there might be several declarations of temp in the different methods). Shallow access is an alternative implementation method, not an alternative semantics. Because with dynamic scoping there is at most one visible version of a variable of any specific name at a given time, a very different approach can . 10. What the task of a linker? It can only be determined at run-time. 7. Describe the shallow-access method of implementing dynamic scoping. Likewise dynamic scope with shallow binding. 17. In this scoping, a variable always refers to its top-level environment. Define static chain, static_depth, nesting_depth, and chain_offset. of the chain cannot be statically determined - Every activation record instance must have variable names. Describe the deep-access method of implementing dynamic scoping. Implementing Dynamic Scope 74 We will discuss two approaches to implement dynamic scope. The dynamic chain is exactly what is needed to reference nonlocal variables in a dynamic-scoped language. Implementing Dynamic Scoping • Two possible ways to implement dynamic scoping are called deep access and shallow access • These are different from deep and shallow binding (different semantics) in that the semantics of dynamic scoping are unaltered by the access method Implementing Dynamic Scoping • Deep Access: non-local references are . In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. . 16. Therefore, the dynamic chain is exactly what is needed to reference nonlocal variables in a dynamic-scoped language. 17. The methods used are necessarily different: the pursuit of human-like intelligence must be in part an empirical science related to psychology, involving observations and hypotheses about actual human behavior and thought processes; a rationalist approach, on the other hand, involves a combination of mathematics and engineering, and connects to . -Every activation record instance must have variable names •Shallow Access: put locals in a central place - One stack for each variable name - Central table with an . 10. Therefore, the dynamic chain is exactly what is needed to reference nonlocal variables in a dynamic-scoped language. . It can only be determined at run-time. Describe the deep-access method of implementing dynamic scoping. • Because with dynamic scoping there is at most one visible version of a variable of any specific name at a given time, a very different approach can be taken. Because with dynamic scoping there is at most one visible version of a variable of any specific name at a given time, a very different approach can be taken. Using this method, space is allocated for every variable name that is in the program (one space for variable temp though there might be several declarations of temp in the different methods). Answer: Shallow access is an alternative implementation method. The following 2 approaches to implementing dynamic scope : 1. Static scoping also makes it much easier to make a modular code as a programmer can figure out the scope . Shallow access is an alternative implementation method, not an alternative semantics. The semantics of deep access and shallow access are identical. - If local variables are stack dynamic and are part of the activation records in a dynamic-scoped language, references to nonlocal variables can be resolved by searching through the activation record instances of the other subprograms that are currently active, beginning with the . Describe the shallow-access method of implementing dynamic scoping. Using this method, space is allocated for every variable name that is in the program (one space for variable temp though there might be several declarations of temp in the different methods). Deep access Shallow access Non-local access Both a and b. Compiler Design Objective type Questions and Answers. Describe the shallow access method of implementing dynamic scoping? Implementing Dynamic Scoping •Deep Access: non-local references are . Shallow Access: put locals in a central place . The semantics of deep access and shallow access are identical. Describe the shallow-access method of implementing dynamic scoping. Deep Access. The semantic of shallow and deep access are indentical. But even if you use, say, JavaScript for lexical scope and Bash for dynamic scope, it should be quick to test both.) 2. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. View Answer. 17. The semantics of deep access and shallow access are identical. 4. Problem Set. Describe the shallow-access method of implementing dynamic scoping. of the chain cannot be statically determined - Every activation record instance must have variable names. Problem Set. Available in abstract form only. Both a and b. 17. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. This is a property of the program text and is unrelated to the run-time call stack. Therefore, the dynamic chain is exactly what is needed to reference nonlocal variables in a dynamic-scoped language. Describe the shallow-access method of implementing dynamic scoping An alternative implementation method, not an alternative semantics. 1. In the shallow-access method, variables declared in subprograms are not stored in the activation records of those subprograms. Describe the deep-access method of implementing dynamic scoping. the problems with that approach •Static links are stored in a single array called a display . The semantic of shallow and deep access are indentical. Shallow access is an alternative implementation method, not an alternative semantics. An alternative implementation method, not an alternative semantics. Deep Access : Dynamic scope results if access links point to the same activation records that control links do. 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