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Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:
P → D* E*
D → int ID {record that ID.lexeme is of type int}
D → bool ID { record that ID.lexeme is of type bool}
E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}
E → !E1 {check that E1.type = bool; set E.type := bool}
E → ID {set E.type := int}
With respect to the above grammar; which one of the following choices is correct?
P → D* E*
D → int ID {record that ID.lexeme is of type int}
D → bool ID { record that ID.lexeme is of type bool}
E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}
E → !E1 {check that E1.type = bool; set E.type := bool}
E → ID {set E.type := int}
With respect to the above grammar; which one of the following choices is correct?
- a)The actions will lead to infinite loop.
- b)The actions can be used to correctly type-check any syntactically correct program.
- c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.
- d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Consider the following grammar (that admits a series of declarations, ...
Understanding the Grammar and Actions
The provided grammar allows for a series of variable declarations followed by expressions, specifically for integer and boolean types. Each production rule is coupled with syntax-directed translation (SDT) actions which help in type-checking.
Type Declarations
- The rules for declarations are:
- D → int ID: Records that ID is of type int.
- D → bool ID: Records that ID is of type bool.
These rules imply that the grammar can handle both integer and boolean variable declarations.
Type Checking for Expressions
- The expression rules are:
- E → E1 + E2: Requires both operands to be of type int.
- E → !E1: Requires E1 to be of type bool.
- E → ID: For integers, it sets the type based on the ID's declaration.
The actions effectively enforce type correctness for integer expressions but have no provisions for handling boolean expressions.
Analysis of the Options
- Option A: Infinite Loop
- The grammar and actions are well-defined, and there is no recursion that could lead to an infinite loop.
- Option B: Correct Type-Check for Any Program
- The grammar does not support the type-checking of boolean expressions, so this option is incorrect.
- Option C: Type-Check Boolean Declarations and Expressions
- While boolean declarations are supported, boolean expressions are not adequately handled in the rules provided, making this option incorrect.
- Option D: Type-Check Integer Declarations and Expressions
- This is correct. The grammar and actions effectively handle integer declarations and ensure type consistency for integer expressions, making it the most suitable choice.
Conclusion
The correct answer is option D, as the grammar and SDT actions successfully manage integer type declarations and expressions, ensuring type safety in those contexts.
The provided grammar allows for a series of variable declarations followed by expressions, specifically for integer and boolean types. Each production rule is coupled with syntax-directed translation (SDT) actions which help in type-checking.
Type Declarations
- The rules for declarations are:
- D → int ID: Records that ID is of type int.
- D → bool ID: Records that ID is of type bool.
These rules imply that the grammar can handle both integer and boolean variable declarations.
Type Checking for Expressions
- The expression rules are:
- E → E1 + E2: Requires both operands to be of type int.
- E → !E1: Requires E1 to be of type bool.
- E → ID: For integers, it sets the type based on the ID's declaration.
The actions effectively enforce type correctness for integer expressions but have no provisions for handling boolean expressions.
Analysis of the Options
- Option A: Infinite Loop
- The grammar and actions are well-defined, and there is no recursion that could lead to an infinite loop.
- Option B: Correct Type-Check for Any Program
- The grammar does not support the type-checking of boolean expressions, so this option is incorrect.
- Option C: Type-Check Boolean Declarations and Expressions
- While boolean declarations are supported, boolean expressions are not adequately handled in the rules provided, making this option incorrect.
- Option D: Type-Check Integer Declarations and Expressions
- This is correct. The grammar and actions effectively handle integer declarations and ensure type consistency for integer expressions, making it the most suitable choice.
Conclusion
The correct answer is option D, as the grammar and SDT actions successfully manage integer type declarations and expressions, ensuring type safety in those contexts.
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Community Answer
Consider the following grammar (that admits a series of declarations, ...
Option 1: The actions will lead to an infinite loop.
This statement is not correct.
This statement is not correct.
Option 2: The actions can be used to correctly type-check any syntactically correct program.
This statement is not correct. Because These SDT actions can not type-check boolean expressions or float expressions.
for example :
float a=3.46;
bool b = 0,c;
c = a+b;
This statement is not correct. Because These SDT actions can not type-check boolean expressions or float expressions.
for example :
float a=3.46;
bool b = 0,c;
c = a+b;
Option 3: The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.
This statement is not correct. Because the SDT actions can not be used to correctly type check boolean expressions.
for example :
bool a = 0;
bool b = 1;
bool c = a+b;
This statement is not correct. Because the SDT actions can not be used to correctly type check boolean expressions.
for example :
bool a = 0;
bool b = 1;
bool c = a+b;
Option 4: The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.
This statement is Correct. Because These SDT actions can be used to correctly type check both integer variables and integer expressions as well.
This statement is Correct. Because These SDT actions can be used to correctly type check both integer variables and integer expressions as well.
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Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer?
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Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer?.
Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
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Here you can find the meaning of Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:P → D* E*D → int ID {record that ID.lexeme is of type int}D → bool ID { record that ID.lexeme is of type bool}E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}E → !E1 {check that E1.type = bool; set E.type := bool}E → ID {set E.type := int}With respect to the above grammar; which one of the following choices is correct?a)The actions will lead to infinite loop.b)The actions can be used to correctly type-check any syntactically correct program.c)The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.d)The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
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