The Cedar, BBN Butterfly, Cosmic Cube and Hypercube machine can be characterized as A. SISD B. MIMD C. SIMD D. MISD E. None of the above

The correct answer is B. MIMD.

SISD (Single Instruction, Single Data) machines have a single processor that executes a single instruction stream on a single data stream. SIMD (Single Instruction, Multiple Data) machines have a single processor that executes a single instruction stream on multiple data streams. MISD (Multiple Instruction, Single Data) machines have multiple processors that execute multiple instruction streams on a single data stream. MIMD (Multiple Instruction, Multiple Data) machines have multiple processors that execute multiple instruction streams on multiple data streams.

The Cedar, BBN Butterfly, Cosmic Cube and Hypercube machine are all MIMD machines. They have multiple processors that can execute multiple instructions at the same time on different data streams. This makes them well-suited for parallel processing applications.

SISD machines are not well-suited for parallel processing applications because they can only execute one instruction