Match all items in Group 1 with correct options from those given in Group 2. GROUP 1 GROUP 2 P. Intermediate representation 1. Activation records Q. Top-down parsing 2. Code generation R. Runtime environments 3. Leftmost derivation S. Register allocation 4. Graph colou…

Match all items in Group 1 with correct options from those given in Group 2. ...

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Question Id : 12047 | Context : NIMCET 2025

Match all items in Group 1 with correct options from those given in Group 2.

GROUP 1	GROUP 2
P. Intermediate representation	1. Activation records
Q. Top-down parsing	2. Code generation
R. Runtime environments	3. Leftmost derivation
S. Register allocation	4. Graph colouring

Group 1	Group 2 (Match)	Explanation
P. Intermediate representation	→ 2. Code generation	Intermediate representation (IR) is the form of code produced by the front end of a compiler and used as input to the code generation phase.
Q. Top-down parsing	→ 3. Leftmost derivation	Top-down parsers construct a parse tree from the root using leftmost derivations.
R. Runtime environments	→ 1. Activation records	Activation records (stack frames) are part of the runtime environment used to manage function calls and local variables.
S. Register allocation	→ 4. Graph colouring	Register allocation is commonly implemented using graph-colouring algorithms to assign variables to CPU registers efficiently.

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