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6. Consider the following JavaScript skeletal program: // The main program var X; function sub1() { var x; function sub2 () { function sub3 () { Assume that the execution of this program is in the following unit order: main calls subl subl calls sub2 sub2 calls sub3 a. Assuming static scoping, in the following, which declaration of x is the correct one for a reference to x? i. subl ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic scoping.

6. Consider the following JavaScript skeletal program: // The main program var X; function sub1() { var x; function sub2 () { function sub3 () { Assume that the execution of this program is in the following unit order: main calls subl subl calls sub2 sub2 calls sub3 a. Assuming static scoping, in the following, which declaration of x is the correct one for a reference to x? i. subl ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic scoping.

Database System Concepts
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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6. Consider the following JavaScript skeletal program: // The main program var X; function subl() { var X; function sub2() { } } function sub3() { } Assume that the execution of this program is in the following unit order: main calls subl subl calls sub2 sub2 calls sub3 a. Assuming static scoping, in the following, which declaration of x is the correct one for a reference to x? i. subl ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic scoping.
Transcribed Image Text:6. Consider the following JavaScript skeletal program: // The main program var X; function subl() { var X; function sub2() { } } function sub3() { } Assume that the execution of this program is in the following unit order: main calls subl subl calls sub2 sub2 calls sub3 a. Assuming static scoping, in the following, which declaration of x is the correct one for a reference to x? i. subl ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic scoping.
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