Two threads, T1 and

T2, are executing in parallel. Can a deadlock occur? Justify your answer.

void thread1() {

    lock(A);

    ...

    lock(B);

    ...

unlock(B);

    unlock(A);

}

void thread2() {

    lock(B);

    ...

    lock(A);

    ...

    unlock(A);

    unlock(B);

}