BSCS Programming Languages and Compilers

Question 1

What is the first phase of a typical compiler?

Accepted Answer

Lexical analysis

Answer

Parsing

Answer

Code generation

Answer

Semantic analysis

Question 2

What does a context-free grammar (CFG) describe?

Accepted Answer

The syntactic structure of a programming language

Answer

The runtime behavior of a program

Answer

The memory layout of variables

Answer

The type system of a language

Question 3

What is the difference between a compiled language and an interpreted language?

Accepted Answer

Compiled code is translated to machine code ahead of time; interpreted code is executed line by line at runtime

Answer

Compiled languages are slower; interpreted languages are faster

Answer

Compiled languages use more memory; interpreted languages do not

Answer

Interpreted languages require an OS; compiled languages do not

Question 4

What is dynamic typing in a programming language?

Accepted Answer

Types are determined and checked at runtime

Answer

Types are checked at compile time

Answer

All variables must be declared as integers

Answer

The language uses only one data type

Question 5

What is a closure in programming?

Accepted Answer

A function that captures variables from its enclosing scope

Answer

A function that terminates the program

Answer

A class with private methods only

Answer

A loop that runs a fixed number of times

Question 6

What does the symbol table store during compilation?

Accepted Answer

Information about identifiers such as type, scope, and memory location

Answer

Machine instructions

Answer

Runtime stack frames

Answer

Intermediate code representations