Viruses attempt to spread through programs/files on a single computer system. However, worms spread via network connections.

Viruses attempt to spread through programs/files on a single computer system however worms spread via network connections.

Viruses attempt to spread through programs/files on a single computer system. However worms spread via network connections.

This sentence is ok.

This sentence contains comma splice.

This sentence is ok.

This sentence contains comma splice.

This is a complete sentence.

This a fragment.

This sentence is ok.

This sentence is fused.

This is a complete sentence.

This is a fragment.

According to [1], experiential learning consists of having an experience, reflecting on that experience, learning from it, and plan changes for the future.

Both sentences have problems.

According to [1], experiential learning consists of having an experience, reflecting on that experience, learning from it, and planning changes for the future.

None of the sentences has problems.

This sentence is ok.

This sentence contains a comma splice.

The manager ordered not only a full report but also some background research.

Both sentences have problems.

None of the sentences has problems.

Wagner and Dean [50] propose a technique, that analyzes the source code of a program.

Wagner and Dean [50] propose a technique that analyzes the source code of a program.

Wagner and Dean [50] propose a technique, which analyzes the source code of a program.