Which of the following is the full form of CISC?

Concept

An acronym is expanded by matching its letters to the established technical term used in that field. In computer architecture, an instruction-set architecture defines the operations a processor can execute.

CISC names a processor-design family whose instruction set contains comparatively complex instructions; one instruction may combine several lower-level operations.

Application

Matching the letters C-I-S-C with the standard architecture term gives Complex Instruction Set Computer.

Contrast

• “Complex Instruction Sequential Compilation” uses compilation terminology and is not the established architecture expansion.

• “Complex Instruction Set Computer” uses the standard architecture terms Complex, Instruction, Set, and Computer.

• “Computer Integrated Sequential Compiler” describes a compiler-oriented phrase rather than an instruction-set architecture.

• “More than one of the listed options” would require at least two listed phrases to be established expansions, which the list does not provide.

• “None of the listed options” would apply only if the established expansion were absent, but it is present in the list.

Cross-check

The initials of Complex, Instruction, Set, and Computer are C-I-S-C, and the phrase identifies the processor-architecture family described by the acronym.

Result

Therefore, CISC stands for Complex Instruction Set Computer.