Choose the correct spelling of the words

Which phase of the compiler ensures that identifiers are declared before they are used?

A grammar that produces multiple parse trees for the same input string is called:

Which of the following grammars is suitable for top-down parsing?

Which of the following is the first phase of a compiler?

If an expression `x = a + b` is computed, and later in the same basic block, `y = a + b` is computed, a compiler can apply which optimization?

Which LR parser is often preferred in practice because it offers a good balance between power and table size, resolving most conflicts that SLR(1) cannot?

Which of the following parsers is the most powerful (can parse the largest class of grammars)?

Which of the following tools is commonly used to generate a lexical analyzer (scanner) from a set of regular expressions?

What is a primary advantage of generating intermediate code during compilation?

Which parsing method uses a stack and an input buffer?