Launchpad programming - day 5 morning (JS)

console.log(examResults.steve[0]);

• [ 99, 98, 95 ]

• [ ]

• 99

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What does the trim() method do in JavaScript?

• It extracts a substring from a string.

• It converts a string to title case.

• It removes all characters from a string.

• It trims whitespace from the beginning and end of a string.

How can you convert a string to lowercase in JavaScript?

• toLower()

• toLowerCase()

• makeLowerCase()

• convertLower()

Which method can be used to split a string into an array of substrings based on a specified delimiter?

• join()

• split()

• slice()

• concat()

What is a code smell in software development?

• A pleasant fragrance added to the code to make it more appealing.

• A warning or error message generated by the compiler or interpreter.

• An indication of potential issues or areas for improvement in the codebase.

• A type of code comment used to provide explanations and documentation.

Answer explanation

Option C accurately defines a code smell in software development. Code smells are patterns or characteristics in code that may indicate underlying problems, such as poor design, inefficiency, or maintainability issues. Identifying and addressing code smells is an important part of code quality and refactoring.

What is refactoring in the context of software development?

• The process of adding new features and functionality to an existing software system.

• The practice of optimising code for execution speed and resource usage.

• The systematic process of restructuring existing code to improve its readability, maintainability, and efficiency without changing its external behaviour.

• The act of fixing bugs and errors in code after it has been deployed to production.

Which is the convention in JS for variables?

• snake_case

• camelCase

• PascalCase

• kebab-case

Can a variable name (identier) in JS start with a number?

• Yes

• No

What does "open source" mean in the context of software and technology?

• Software that is in the public domain and can be used without any restrictions.

• Software that is closed off to the public and not available for use or modification.

• Software that is developed by a single company and can only be used for commercial purposes.

• Software that is made available to the public with its source code, allowing anyone to view, use, modify, and distribute it under certain licenses.

What does "proprietary software" mean in the context of software and technology?

• Software that is freely available for anyone to use, modify, and distribute.

• Software that is developed and owned by a specific individual or organisation, and its source code is typically not publicly available.

• Software that is in the public domain and can be used without any restrictions.

• Software that is open source and allows for community-driven development.