有一矩阵“int a[50][50]”以行为序进行存储，有一个虚拟存储系统，物理内存共有 3页，其中1页用来存放程序，其余2页用于存放数据。假设程序已在内存中占1页，其余 2页空闲。
程序A：
for(i=0; i＜=49；i++)
for(j=0; j＜=49；j++)
A[i][j]=0;
程序B：
for(i=0; i＜=49; i++)
for(j=0; j＜=49; j++)
A[i][j]=0;
若每页可存放50个整数，执行程序A会发生 (52) 次缺页，执行程序B会发生 (53) 次缺页。
（52）处填（）。
A．50
B．100
C．1000
D．2500
参考答案：A
| 完形填空。 |
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