Explain the relation between allocation blocks and logical block on a Mac OS file system.
What will be an ideal response?
ANSWER: Volumes have allocation blocks and logical blocks. A logical block is a collection of data that cannot exceed 512 bytes. When you save a file, it is assigned to an allocation block, which is a group of consecutive logical blocks. As volumes increase in size, one allocation block might be composed of three or more logical blocks. If a file contains information, it always occupies one allocation block. For example, if a data fork contains only 11 bytes of data, it occupies one allocation block (512 bytes) on a disk, which leaves more than 500 bytes empty in the data fork.
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Answer the following statements true (T) or false (F)
1. Arrays that are capable of holding the contents of a table with several rows and columns, are known as two-dimensional arrays or double subscripted variables. 2. The statement Dim nextVar(3, 5) As Double declares a two-dimensional array that can store a table containing 4 columns and 6 rows of numeric data. 3. The statement Dim nextVar(7, 8) As Double declares a two-dimensional array that can store a table containing 7 rows and 8 columns of numeric data. 4. A two-dimensional array can be declared and initialized at the same time. 5. If the two-dimensional array nums has three rows and six columns, then the value of nums.GetUpperBound(0) is 3 and the value of nums.GetUpperBound(1) is 6.
When a user is entering input for a parameter query, the text they input is case sensitive
Indicate whether the statement is true or false
________ in relationships requires that only values that have a corresponding value in the primary table can be entered for a foreign key
Fill in the blank(s) with correct word
Match the following terms to their meanings:
I. criterion II. filter III. normalization IV. comparison operator V. foreign key A. process of grouping data into correct tables B. display of a subset of records C. evaluates the relationship between two quantities D. number, text phrase, or expression used to select records from a table E. a field in one table that is the primary key in another table