Type Casting and Operators in Programming
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Questions and Answers

What is the result of combining the string literal 'Total amount is ' with the integer literal 1000?

  • A floating-point numeric literal 1000.0
  • An integer value 1000
  • An error due to incompatible types
  • A string with the value 'Total amount is 1000' (correct)

    • Which term describes the process of combining different data types like adding a numeric literal with a string literal?

  • Arithmetic operation
  • Syntax error
  • Type conversion (correct)
  • Variable declaration

    • What is the term used for an operator that requires two operands?

  • Binary operator (correct)
  • Unary operator
  • Ternary operator
  • Arithmetic operator

    • How are expressions evaluated to determine their value?

    <p>By applying operators to operands</p> Signup and view all the answers

    What happens when an operator requires three operands?

    <p>It is called a ternary operator</p> Signup and view all the answers

    What do arithmetic operators mainly operate on according to the provided text?

    <p>Math calculations</p> Signup and view all the answers

    What two main tools are needed to create web pages?

    <p>A text editor and a web browser</p> Signup and view all the answers

    Where are the majority of web pages containing JavaScript usually stored?

    <p>On the hard drive and loaded directly into the browser</p> Signup and view all the answers

    What is the main function of a web server?

    <p>To hold lots of web pages on its hard drive</p> Signup and view all the answers

    How does a web server pass a requested web page back to the client computer?

    <p>Via a special communications protocol called HTTP</p> Signup and view all the answers

    In the client/server relationship, what role does the client play?

    <p>It requests web pages from the server</p> Signup and view all the answers

    What analogy is used to explain the client/server relationship?

    <p>Customer/shopkeeper relationship</p> Signup and view all the answers

    What happens if you try to use a JavaScript variable before it is defined?

    <p>It results in an error</p> Signup and view all the answers

    Where should scripts that need to run as the page loads be placed in an HTML document?

    <p>Before the closing body tag</p> Signup and view all the answers

    How does JavaScript handle data types when a variable is created?

    <p>It allows the same variable to hold different data types</p> Signup and view all the answers

    Which of the following is NOT a primitive type of data in JavaScript?

    <p>Object</p> Signup and view all the answers

    In JavaScript, literals are used for what purpose?

    <p>Storing fixed values directly in programs</p> Signup and view all the answers

    When should scripts that are event-driven be written in an HTML document?

    <p>After the closing body tag</p> Signup and view all the answers

    What is a key advantage of writing JavaScript embedded within HTML?

    <p>It can be written in any text editor like Notepad.</p> Signup and view all the answers

    Why is JavaScript considered easy to learn?

    <p>Only involves learning a few commands and simple syntax rules.</p> Signup and view all the answers

    What feature contributes to the quick development of scripts in JavaScript?

    <p>Use of alerts, prompts, and confirm boxes.</p> Signup and view all the answers

    Why is JavaScript well suited for simple, small programs?

    <p>Simple programs can be written and executed easily at an acceptable speed.</p> Signup and view all the answers

    What procedural capabilities does JavaScript provide?

    <p>Allows adding procedural capabilities like condition checking, looping, and branching.</p> Signup and view all the answers

    How does the interpretative nature of JavaScript improve debugging and testing?

    <p>Scripts are tested line by line with errors listed as they are encountered.</p> Signup and view all the answers

    What is a key characteristic of variable names in JavaScript?

    <p>They cannot contain spaces</p> Signup and view all the answers

    Which of the following is a valid variable name in JavaScript?

    <p>roll_no</p> Signup and view all the answers

    What is the purpose of the 'var' keyword in JavaScript?

    <p>To declare variables</p> Signup and view all the answers

    Which of the following is an example of initializing a variable in JavaScript?

    <p>var x=10;</p> Signup and view all the answers

    What are literals in JavaScript?

    <p>Fixed or constant values</p> Signup and view all the answers

    How are variables handled in terms of type casting in JavaScript?

    <p>Variables are loosely cast based on assigned values</p> Signup and view all the answers

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