A.Compilation fails.
B.The file system has a new empty directory named dir.
C.The file system has a new empty directory named newDir.
D.The file system has a directory named dir, containing a file f1.txt.
E.The file system has a directory named newDir, containing a file f1.txt.
第1题:
A. read
B. read-write
C. read-only
D. write
第2题:
第3题:
3、下列两个事务的指令是冲突指令的是
A.T1:Read(M), T2:Write(N)
B.T1:Write(M),T2:Write(N)
C.T1:Write(N),T2:Read(N)
D.T1:Read(N), T2:Read(N)
第4题:
第5题:
第6题:
下列两个事务的指令是冲突指令的是
A.T1:Read(M), T2:Write(N)
B.T1:Write(M),T2:Write(N)
C.T1:Write(N),T2:Read(N)
D.T1:Read(N), T2:Read(N)