Knowledge check

Check your knowledge

When is it appropriate to use a switch-case construct rather than a if-elseif-else construct?

A switch-case construct is appropriate when more than 2-3 else if code blocks are required.

A switch-case construct is appropriate when the number of case patterns is small.

A switch-case construct is appropriate when the selection statement is inside a loop.

Why should a developer choose a for statement rather than a foreach statement when processing the contents of a multidimensional array?

for statements do a better job of examining each array item separately.

foreach statements do a better job of examining each array item separately.

for statements enable a developer to treat array dimensions separately.

Why is it important to scope a variable at its lowest necessary level?

It ensures that a variable that's declared outside of a code block, can be accessed inside the code block before it's been assigned a value.

It ensures that application resources and the security footprint are kept small.

It ensures that a variable can be accessed within the lowest level code branches of an application.

You must answer all questions before checking your work.