Which operation cannot be completed with the use of sequential files?
a. inserting a record in the middle of a file
b. deleting a record in the middle of a file
c. changing the value of one field in one record in a file
d. all of the above are possible
D
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What is a variable’s scope?
A. The length of time the variable is in existence. B. Determines who can see and access the variable. C. Both A & B D. None of these.
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Indicate whether the statement is true or false
Which of the following ciphers substitutes the first letter of the alphabet with the last letter of the alphabet?
a. Caesar cipher b. ROT13 c. Atbash cipher d. Vigenere
A(n) __________ expression evaluates as either True or False.
Fill in the blank(s) with the appropriate word(s).