1. Consider the following structure of a procedure in a certain programming language procedure Big is X: Integer; - declaration 1 procedure Subl is begin - of Sub1 ...X... end; - of Subl procedure Sub2 is X: Integer; - declaration 2 begin - of Sub2 end - of Sub2 begin - of Big end - of Big a. (Sample Item) Assume that dynamic scoping applies to nonlocal variables. (ie. X referenced in Subl is dynamic). Suppose Big calls Sub2 which in turn calls Subl, which reference to X in Subl applies? Answer: X of Sub2 b. Assume that dynamic scoping applies to nonlocal variables. (i.e. X referenced in Subl is dynamic). Suppose Subl is directly called by Big, which reference to X in Subl applies? Answer: ? c. Assume that static scoping applies to nonlocal variables. Suppose Subl is directly called by Big, which reference to X in Subl applies? Answer: ?
1. Consider the following structure of a procedure in a certain programming language procedure Big is X: Integer; - declaration 1 procedure Subl is begin - of Sub1 ...X... end; - of Subl procedure Sub2 is X: Integer; - declaration 2 begin - of Sub2 end - of Sub2 begin - of Big end - of Big a. (Sample Item) Assume that dynamic scoping applies to nonlocal variables. (ie. X referenced in Subl is dynamic). Suppose Big calls Sub2 which in turn calls Subl, which reference to X in Subl applies? Answer: X of Sub2 b. Assume that dynamic scoping applies to nonlocal variables. (i.e. X referenced in Subl is dynamic). Suppose Subl is directly called by Big, which reference to X in Subl applies? Answer: ? c. Assume that static scoping applies to nonlocal variables. Suppose Subl is directly called by Big, which reference to X in Subl applies? Answer: ?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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