Translator

What is usually defined using a context-free language?

• Syntax

• Semantics

The smallest elements used in any programming language are usually called:

• Syntax

• Expressions

• Tokens

• Identifiers

What are the three types of programming language translators?

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Which type of translator produces an equivalent program in a form suitable for execution?

• Pseudo-Interpreter

• Interpreter

• Compiler

Which type of translator executes a program directly in a one step process?

• Pseudo-Interpreter

• Interpreter

• Compiler

What is a pseudo-interpreter? Give an example of a programming language that uses a pseudo-interpreter.

Answer explanation

A pseudo-interpreter is intermediate between interpreters and compilers.

A source program is compiled into an intermediate language.

The intermediate language is then interpreted.

Example: Java

Which operation determines the structure of the sequence of tokens?

• Scanning

• Semantic analysis

• Parsing

• Compiling

Which operation converts the textual representation of the program into tokens representing keywords, identifiers, constants etc.?

• Scanning

• Semantic analysis

• Parsing

• Compiling

What type of properties are the lexical and syntactic structures of a programming language? Justify.

a) Static b) Dynamic

Answer explanation

Static, The lexical and syntactic structures of a programming language can be determined prior to execution and hence they are static.

Classify each of the following errors:

• Static Semantic Error

• Syntax Error

• Dynamic Semantic Error

• Logic Error