Long description

Four vertical blocks are labeled process table, program, data 1 and data 2 from left to right. The blocks except the first one are together labeled page tables. The first table is placed at the upper left of the other three tables and consists of three rows. The second table consists of ten rows out of which last three bottom rows are shaded. The third and fourth block consists of ten rows in which the rows four to ten are shaded. Two arrows from the second row of the process block point to the program and data 2 block. Another two arrows from the third row of the process table block point to the program and data 1 block.