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Dynamic Type Checking in Programming

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Questions and Answers

Which of the following languages is an example of a language that uses dynamic type checking?

Java

Python

JavaScript (correct)

What happens if the value of a * b is out of the acceptable range of ints?

The operation is performed without any checks

The program terminates with a syntax error

The compiler checks for type compatibility at compile time

A type error occurs at runtime (correct)

What is dynamic type checking?

Checking the type of a variable at runtime (correct)

Declaring the type of a variable before its use

Implicitly converting a variable to a compatible type

Checking the type of a variable at compile time

What is the disadvantage of dynamic type checking?

It comes with a runtime performance penalty (D) Signup and view all the answers

What is implicit type conversion?

Automatically changing the type of a variable to a compatible type (B) Signup and view all the answers

In which language does implicit type conversion occur?

C (C) Signup and view all the answers

What is the primary requirement for the % operation to be applied?

Both operands must be of the same type of integer (A) Signup and view all the answers

What type of language is considered strongly typed if it detects each and every type error during compilation?

Statically typed (B) Signup and view all the answers

Where is the information needed for static type checking obtained from?

Via declarations and stored in a master symbol table (A) Signup and view all the answers

What is the primary goal of type checking?

To detect and prevent type errors (D) Signup and view all the answers

What type of type checking is done at compile time?

Static type checking (A) Signup and view all the answers

Which type of static type checking is used to prevent errors in branching statements?

Flow of control checking (A) Signup and view all the answers

What type of error occurs when a language does not detect type errors during compilation?

Runtime type error (D) Signup and view all the answers

What is one of the benefits of type coersion?

It can free a programmer from worrying about type details (D) Signup and view all the answers

What happens when an operator is applied to incompatible operands?

The compiler will report an error (A) Signup and view all the answers

Which languages are stricter about type coercion?

Ada and Pascal (B) Signup and view all the answers

What is the purpose of type checks in static type checking?

To ensure the operator is applied to compatible operands (C) Signup and view all the answers

What is a potential drawback of implicit type promotion?

It can hide serious type errors that might otherwise have popped up during compilation (C) Signup and view all the answers